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The bony fishes (Teleostei) caught by industrial trawlers off the Brazilian North coast, with insights into its conservation

ABSTRACT

The Brazilian North coast is one of the world’s most important shrimp fishery grounds, with a total area of approximately 223,000 km2. However, the available data on the diversity of fish caught by the region’s industrial trawler fleet are limited to the commercially-valuable species. This lacuna in the data on the region’s marine fish fauna is worrying, both for the management of stocks and the conservation of the local biodiversity. The present study was based on a comprehensive inventory of the teleost fishes captured by the industrial outrigger trawling operations off the North coast of Brazil. This inventory recorded 201 species belonging to 64 families and 20 orders, and revealed a unique fauna, characterized by 17 endemic species, and a mixture of estuarine-dependent and marine species, mainly associated with coral reefs. The Kernel density analysis indicated that the industrial trawling fleet operates within an important ecotone, which encompasses the transition zones of different fish communities found off the Brazilian North coast.

Keywords:
Biodiversity; Bycatch; Fishes discarded; Inventory; Marine fish; Outrigger trawling

RESUMO

A costa Norte do Brasil é um dos pesqueiros de camarão mais importantes do mundo, com uma área total de aproximadamente 223.000 km2. No entanto, dados disponíveis sobre a diversidade de peixes capturados pela frota industrial de arrasto de portas na região são limitados às espécies com valor comercial. Essa lacuna no conhecimento sobre a fauna de peixes marinhos da região é preocupante, tanto para o manejo dos estoques quanto para a conservação da biodiversidade local. O presente estudo é baseado num inventário abrangente dos peixes teleósteos capturados por operações de arrasto de portas da frota industrial que opera na costa Norte do Brasil. Este inventário registrou 201 espécies pertencentes a 64 famílias e 20 ordens, e revelou uma fauna única, caracterizada por 17 espécies endêmicas, e uma mistura de espécies estuarino-dependentes e espécies marinhas, principalmente associadas a recifes de corais. A análise da densidade Kernel indicou que a frota industrial de arrasto de portas opera dentro de um importante ecótono, que abrange uma zona de transição de diferentes comunidades de peixes encontrados na costa Norte do Brasil.

Palavras-chave:
Biodiversidade; Fauna acompanhante; Inventário; Peixes descartados; Peixes marinhos; Pesca de arrasto de portas

Introduction

Different fishery techniques are used to target determined species, although all types of industrial fishery operation result in the harvesting of bycatch, that is, species captured unintentionally (Eayrs, 2007Eayrs SA. Guide to bycatch reduction in tropical shrimp-trawl fisheries. Rome: Food and Agriculture Organization of the United Nations; 2007.; Davies et al., 2009Davies RWD, Cripps SJ, Nickson A, Porter G. Defining and estimating global marine fisheries bycatch. Mar Pol, Cardiff. 2009; 33(4):661-72.). The amount and diversity of this bycatch may vary significantly among different fishery operation (Clucas, 1997Clucas I. A study of the options for utilization of bycath and discards from marine capture fisheries. Rome: Food and Agriculture Organization of the United Nations, Fisheries circular; No.; 1997.), and among fishing grounds and seasons (Paiva et al., 2009Paiva KS, Aragão JAN, Silva KCA, Cintra IHA. Fauna acompanhante da pesca industrial do camarão-rosa na plataforma continental norte brasileira. Bol Téc Cient Cepnor. 2009; 9(1):25-42.; Maia et al., 2016Maia BP, Nunes ZMP, Holanda FCAF, Silva VHS, Silva BB. Gradiente latitudinal da beta diversidade da fauna acompanhante das pescarias industriais de camarões marinhos da costa norte do Brasil. Biota Amazonica. 2016; 6(1):31-39.). Outrigger trawling, in particular, is known for its reduced selectivity and high proportion of incidental catch (Perez, Pezzuto, 1998Perez JAA, Pezzuto PR. A pesca de arrasto de talude do sudeste e sul do Brasil: Tendências da frota nacional entre 2001-2003. Bol Inst Pesca. 2006; 32(2):127-50.; Diamond et al., 2000Diamond SL, Cowell LG, Crowder LB. Population effects of shrimp trawl bycatch on Atlantic croaker. Can J Fish Aquat Sci. 2000; 57(100):2010-21.). The bycatch generated by outrigger trawling operations is typically made up of both commercially-valuable species and other species that are discarded, either because they have a low market value or because of the lack of adequate technology for the processing of the catch (Saila, 1983Saila SB. Importance and assessment of discards in commercial fisheries. Rome: Food and Agriculture Organization of the United Nations (FAO) ; 1983 (Fisheries Circular, No 765).; Alverson et al., 1994Alverson DL, Freeberg MH, Pope JG, Murawski JA. A global assessment of fisheries bycatch and discards. FAO Fish Tech Pap. 1994; 339:1-233.; Clucas, 1998Clucas I. Bycatch - is it a bonus from the sea? Infofish Intern. 1998; 3:24-28.).

In addition to the large volume of bycatch, which may often exceed the amount of shrimp harvested (Paiva et al., 2009Paiva KS, Aragão JAN, Silva KCA, Cintra IHA. Fauna acompanhante da pesca industrial do camarão-rosa na plataforma continental norte brasileira. Bol Téc Cient Cepnor. 2009; 9(1):25-42.; Aragão et al., 2015Aragão JAN, Silva KC, Cintra IH. Situação da pesca de camarões na plataforma continental Amazônica. Acta Fish Aquatic Res. 2015; 3(2):61-76.), industrial shrimp outrigger trawling operations cause profound impacts on the environment (Stobutzki et al., 2001Stobutzki I, Miller M, Brewer D. Sustainability of fishery by-catch: a process for assessing highly diverse and numerous by-catch. Environ Conserv. 2001; 28(2):167-81.) through the destruction of bottom substrates and the elimination of benthic organisms such as coral reefs. The discarding of low-value species may have a significant impact on the local biodiversity (Clucas, 1997Clucas I. A study of the options for utilization of bycath and discards from marine capture fisheries. Rome: Food and Agriculture Organization of the United Nations, Fisheries circular; No.; 1997.), altering the structure of fish assemblages (Wassenberg, Hill, 1989Wassenberg TJ, Hill BJ. The effect of trawling and subsequent handling on the surviral rates of the bycatch of prawn trawlers in Moreton Bay, Australia. Fish Res. 1989; 7:99-110.; Anderson et al., 2013Anderson MJ, Tolimieri N, Millar RB. Beta diversity of demersal fish assemblages in the North-Eastern Pacific: Interactions of latitude and depth. PLoS ONE 2013; 8(3): e57918. doi:10.1371/journal.pone.0057918.
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), and vanishing species that may significantly impairthe the trophic web. This makes the effective management of outrigger trawling operations a major challenge (Davies et al., 2009Davies RWD, Cripps SJ, Nickson A, Porter G. Defining and estimating global marine fisheries bycatch. Mar Pol, Cardiff. 2009; 33(4):661-72.).

The North coast of Brazil is one of the world’s most important shrimp fishery grounds, which extends from the border with French Guiana to the state line between the Brazilian states of Maranhão and Piauí, with a total area of approximately 223,000 km2 (Corrêa, Martinelli, 2009Corrêa AB, Martinelli JM. Composição da população do camarão rosa Farfantepenaeus subtilis (Pérez-Farfante 1967) no estuário do rio Curuçá, Pará, Brasil. Ver Cient UFPA 2009; 7:1-18.). This area is characterized primarily by the enormous input of nutrients and sediment from the Amazon River and coastal drainage basins, which contribute to the region’s abundance of fish and crustaceans (Isaac et al., 1992Isaac VJ, Dias Neto J, Damasceno FG. Biologia, dinâmica de populações e administração pesqueira do camarão rosa Penaeus subtilis da região norte do Brasil. Brasília: IBAMA ; 1992. (Coleção Meio Ambiente, Série de Estudos de Pesca).), being that, the hydrological regime has a great influence on the life cycle of the species found in the region (Aragão et al., 2015Aragão JAN, Silva KC, Cintra IH. Situação da pesca de camarões na plataforma continental Amazônica. Acta Fish Aquatic Res. 2015; 3(2):61-76.; Isaac, Braga, 1999Isaac VJ, Braga TMP. Rejeição de pescado nas pescarias da região norte do Brasil. Ar Ciên Mar. 1999; 21:39-54.). However, the influence of the region’s coral reefs on the fauna exploited by the industrial fisheries of the north coast of Brazil is still unclear (Moura et al., 2016Moura RL, Amado-Filho GM, Moraes FC, Brasileiro PS, Salomon PS, Mahiques MM et al. An extensive reef system at the Amazon River mouth. Sci Adv, 2016; 2(4):e1501252.; Francini-Filho et al., 2018Francini-Filho RB, Asp NE, Siegle E, Hocevar J, Lowyck K, D’Avila N et al. Perspectives on the great Amazon reef: Extension, biodiversity, and threats. Front Mar Sci. 2018; 5(142):1-5.). Some species from this coral reef guild are considerable valuable in fisheries, as groupers and snappers, but the real impact of fisheries on these specific populations along north coast of Brazil is not clear.

A number of recent studies have described the region’s industrial fishing fleet (Silva et al., 2014Silva LEO, Silva KCA, Contra IHA. Sobre a pesca industrial para peixes diversos na plataforma continental amazônica. Rev Bras Eng Pesc. 2014; 7(2):34-53.; Aragão et al., 2015Aragão JAN, Silva KC, Cintra IH. Situação da pesca de camarões na plataforma continental Amazônica. Acta Fish Aquatic Res. 2015; 3(2):61-76.), its productivity, fishery statistics, and marketing network (Pinheiro, Frédou, 2004Pinheiro LA, Frédou FL. Caracterização geral da pesca industrial desembarcada no estado do Pará. Revista virtual de Iniciação Científica da Universidade Federal do Pará. 2004; Available from http://www.ufpa.br/revistaic. http://www.cultura.ufpa.br/rcientifica/ed_anteriores/pdf/ed_04_lap.pdf
http://www.ufpa.br/revistaic...
; Isaac et al., 2008Isaac VJ, Santo RVE, Nunes JLG. A estatística pesqueira no litoral do Pará: resultados divergentes. Panam J Aquat Sci. 2008; 3:205-13.; Frédou et al., 2009Frédou FL, Mourão KM, Barbosa C, Magalhães O, Rivero S, Thompson R. Caracterização das pescarias industriais da costa norte do Brasil. Papers of NAEA (UFPA), 2009; 237:1-33.; Pinheiro et al., 2013Pinheiro MLS, Loureiro JPB, Borges FQ, Nascimeno RF. Cadeia produtiva do pescado no estado do Pará: estudo do segmento de distribuição em um empreendimento de captura. RAMA. 2013, 7(2):315-36.). Other studies, such as those of Isaac, Braga (1999Isaac VJ, Braga TMP. Rejeição de pescado nas pescarias da região norte do Brasil. Ar Ciên Mar. 1999; 21:39-54.), Pinheiro, Frédou (2004Pinheiro LA, Frédou FL. Caracterização geral da pesca industrial desembarcada no estado do Pará. Revista virtual de Iniciação Científica da Universidade Federal do Pará. 2004; Available from http://www.ufpa.br/revistaic. http://www.cultura.ufpa.br/rcientifica/ed_anteriores/pdf/ed_04_lap.pdf
http://www.ufpa.br/revistaic...
), Paiva et al. (2009Paiva KS, Aragão JAN, Silva KCA, Cintra IHA. Fauna acompanhante da pesca industrial do camarão-rosa na plataforma continental norte brasileira. Bol Téc Cient Cepnor. 2009; 9(1):25-42.), and Aragão et al. (2015Aragão JAN, Silva KC, Cintra IH. Situação da pesca de camarões na plataforma continental Amazônica. Acta Fish Aquatic Res. 2015; 3(2):61-76.) have attempted to determine the volume of the bycatch harvested by industrial fisheries off the North coast of Brazil, although the data available on the composition of the bycatch is limited to the commercially-valuable species (Paiva et al., 2009Paiva KS, Aragão JAN, Silva KCA, Cintra IHA. Fauna acompanhante da pesca industrial do camarão-rosa na plataforma continental norte brasileira. Bol Téc Cient Cepnor. 2009; 9(1):25-42.; Aragão et al., 2015Aragão JAN, Silva KC, Cintra IH. Situação da pesca de camarões na plataforma continental Amazônica. Acta Fish Aquatic Res. 2015; 3(2):61-76.; Maia et al., 2016Maia BP, Nunes ZMP, Holanda FCAF, Silva VHS, Silva BB. Gradiente latitudinal da beta diversidade da fauna acompanhante das pescarias industriais de camarões marinhos da costa norte do Brasil. Biota Amazonica. 2016; 6(1):31-39.). This situation is a major cause for concern given the considerable lacuna in the understanding of the diversity of the teleost fish fauna of the Brazilian North coast (Marceniuk et al., 2013Marceniuk AP, Caires RA, Wosiacki WB, Di Dario F. Conhecimento e conservação dos peixes marinhos e estuarinos (Chondrichthyes e Teleostei) da Costa Norte do Brasil. Biota Neotrop. 2013; 13:251-59., 2017Marceniuk AP, Caires RA, Rotundo MM, Alcantara RAK, Wosiacki WB. The icthyofauna (Teleostei) of the rio Caeté estuary, northeast Pará, Brazil, with a species identification key from northern Brazilian coast. Panam J Aquat Sci . 2017; 12(1):31-79.).

The reliable identifications of this fauna is fundamentally important for studies of the quality of the environment, and the establishment of criteria for the zoning of fishing grounds, which must be based not only on the number of species, but also the diversity of the environments and communities affected by fisheries (sensuManthey, Fridley, 2009Manthey M, Fridley JD. Beta diversity metrics and the estimation of niche width via species co-occurrence data: reply to Zeleny. J Ecol. 2009; 97:18-22.). In this sense, the incomplete knowledge, or the absence of data on the bony fish species captured by outrigger trawlers represent potential limitations for the development of effective measures for the protection of this fauna, and the management of the ecosystems exploited by the fisheries (Thrush et al., 1998Thrush S, Hewitt J, Cummings V, Dayton P, Cryer M, Turner S et al. Disturbance of the marine benthic habitat by commercial fishing: impacts at the scale of the fishery. Ecol Appl. 1998; 8:866-79.; Greenstreet, Rogers, 2004Greenstreet SP, Rogers S. Indicators of the health of the North Sea fish community: identifying reference levels for an ecosystem approach to management. ICES J Mar Sci 2004; 67:573-93.; Juan, Demestres, 2012Juan S, Demestre M. A trawl disturbance Indicator to quantify large scale fishing impact on benthic ecosystems. Ecol Indic. 2012; 18:183-90.).

In this context, the present study is based on a comprehensive inventory of the teleost fishes harvested by the industrial trawling operations of the North coast of Brazil, including outriggers that target pink-shrimp, Penaeus spp., and pair trawlers that target number of fish species, with additional data obtained from published studies. Based on data obtained from the industrial trawling operations in coast of the Pará and Amapá states, we try to characterize the diversity of the teleost fish harvested by the region’s industrial outrigger trawling operations, defining distinct communities of fish, according to the habitats they occupy, and determine which areas are occupied more intensively occupied by these communities, using a Kernel Density Estimation (KDE) approach. The zones with the greatest species richness are identified as a baseline for the implementation of effective conservation policies.

Material and Methods

Study area. The North coast of Brazil refers to the region between the mouth of the rio Oiapoque (04o23’ N), which forms the border between Brazil and French Guiana, and the mouth of the rio Parnaíba (02o53’ S), which forms the state line between Maranhão and Piauí (Fig. 1). This area forms part of a vast shrimping ground, which extends north to the area adjacent to the mouth of the rio Orinoco, in Venezuela (IBAMA, 1997Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis (IBAMA). Camarão norte e piramutaba: Relatórios das reuniões dos grupos permanentes de estudos. Brasília: IBAMA; 1997 (Coleção Meio Ambiente; Série Estudos Pesca; 9).). The Brazilian North coast is divided into three sectors (Studart-Gomes, 1988Studart-Gomes PR. A pesca industrial de camarão rosa no Norte do Brasil. In: V Congresso Brasileiro de Engenharia de Pesca, 1987. Fortaleza: Associação dos Engenheiros de Pesca do Estado do Ceará, 1988. p.419-34.): (i) the coast of Maranhão, between the rio Parnaíba (02o53’ S) and Cape Gurupi (00o53’ S), where the bottom substrates are a mixture of mud and sand, and the fishing grounds are close to the coast, (ii) the coast of Pará, between 02o30’ N and 00o50’ S, with predominantly muddy bottoms, and (iii) the coast of Amapá, between 04o23’ N and 02o30’ N (Cape Orange), which is dominated by hard and rocky substrates. The present study focused on the continental shelf of this region, in the two northern most sectors (Pará and Amapá), where the industrial outrigger trawling fleet based in Belém (Pará) concentrates its operations (Fig. 1).

Fig. 1
(A) Industrial trawling zone off the North coast of Brazil (modified from Aragão et al., 2001Aragão JAN, Cintra IHA, Silva KCA, Vieira IJA. A exploração camaroeira na costa Norte do Brasil. Bol. Tec. Cient. CEPNOR 2001; 1(1):11-44. and Brasil, 2011). Outriggers that target pink-shrimp (red outline) and pair trawlers that target a number of fish species (black dots in the main image and green shading in C-E). The Amazon River plume is shaded gray. The Great Amazon Reef System, as defined by Moura et al. (2016Moura RL, Amado-Filho GM, Moraes FC, Brasileiro PS, Salomon PS, Mahiques MM et al. An extensive reef system at the Amazon River mouth. Sci Adv, 2016; 2(4):e1501252.), is shaded orange in all images (A-E), while the system defined by Francini-Filho et al. (2018Francini-Filho RB, Asp NE, Siegle E, Hocevar J, Lowyck K, D’Avila N et al. Perspectives on the great Amazon reef: Extension, biodiversity, and threats. Front Mar Sci. 2018; 5(142):1-5.) is shaded green here, and red in all other images (B-E); (B-E) Kernel density plots of (B) estuarine species; (C) estuarine species also associated with coral reefs; (D) species associated with coral reefs or rock bottom; (E) marine species, not associated with coral reefs.

Material examined. The inventory of the teleost fishes harvested by trawlers off the Brazilian states of Amapá and Pará, was based on the observations conducted by observers of the Centro Nacional de Pesquisa e Conservação da Biodiversidade Marinha da Costa Norte do Brasil at Belém, Pará State (CEPNOR), embarked on trawlers in 2016 and 2018, when they monitored 29 trawling operations off Amapá and Pará, between 03°37’32.7” N and 00°11’75.4” S (Fig. 1). A total of 517 trawls were monitored during the study period, corresponding to 1.644 operational hours and 273 days at sea, including 160 days during the shrimping season and 103 during the off season (Fig. 2A). Complementary data were obtained through a literature search (Pinheiro, Frédou, 2004Pinheiro LA, Frédou FL. Caracterização geral da pesca industrial desembarcada no estado do Pará. Revista virtual de Iniciação Científica da Universidade Federal do Pará. 2004; Available from http://www.ufpa.br/revistaic. http://www.cultura.ufpa.br/rcientifica/ed_anteriores/pdf/ed_04_lap.pdf
http://www.ufpa.br/revistaic...
; Oliveira et al., 2004Oliveira GB, Negreiro JA, Santos FJ. Prospecção pesqueira de recursos demersais utilizando rede de arrasto para peixes na zona econômica exclusiva da costa norte do Brasil, Report Revizee Program. Brasília: Ministério do Meio Ambiente ; 2004.; Maia et al., 2016Maia BP, Nunes ZMP, Holanda FCAF, Silva VHS, Silva BB. Gradiente latitudinal da beta diversidade da fauna acompanhante das pescarias industriais de camarões marinhos da costa norte do Brasil. Biota Amazonica. 2016; 6(1):31-39.).

Fig. 2
Collection conducted by observers of the Centro de Pesquisa e Gestão de Recursos Pesqueiros do Litoral Norte do Brasil (CEPNOR), embarked on trawlers.

The specimens collected during this monitoring were processed at sea and specimens deposited in the ichthyological collection of the Museu Paraense Emílio Goeldi at Belém, Pará State (MPEG), the zoological collection of the Universidade Santa Cecília at Santos, São Paulo State (AZUSC), and the Laboratório de Biologia e Genética de Peixes (LBP) of the Universidade Estadual Paulista Júlio de Mesquita at Botucatu, São Paulo State. Published papers on the teleost fish species harvested as bycatch by the industrial outrigger trawling fleet of the North coast do Brazil (Oliveira et al., 2004Oliveira GB, Negreiro JA, Santos FJ. Prospecção pesqueira de recursos demersais utilizando rede de arrasto para peixes na zona econômica exclusiva da costa norte do Brasil, Report Revizee Program. Brasília: Ministério do Meio Ambiente ; 2004.; Pinheiro, Frédou, 2004Pinheiro LA, Frédou FL. Caracterização geral da pesca industrial desembarcada no estado do Pará. Revista virtual de Iniciação Científica da Universidade Federal do Pará. 2004; Available from http://www.ufpa.br/revistaic. http://www.cultura.ufpa.br/rcientifica/ed_anteriores/pdf/ed_04_lap.pdf
http://www.ufpa.br/revistaic...
; Maia et al., 2016Maia BP, Nunes ZMP, Holanda FCAF, Silva VHS, Silva BB. Gradiente latitudinal da beta diversidade da fauna acompanhante das pescarias industriais de camarões marinhos da costa norte do Brasil. Biota Amazonica. 2016; 6(1):31-39.) were used as a secondary source of data. Additional data were obtained from publications on the bycatch of the industrial outrigger trawling fleet operating off the southeastern coast of Brazil (Graça-Lopes et al., 2002Graça-Lopes R, Tomás ARG, Tutui SLS, Severino-Rodrigues E, Puzzi A. Fauna acompanhante da pesca camaroneira no litoral do Estado de São Paulo, Brasil. Bol Inst Pesca, São Paulo. 2002; 28(2):173-88; Vianna, Almeida, 2005Vianna M, Almeida T. Bony fish bycatch in the Southern Brazil pink shrimp (Farfantepenaeus brasiliensis and F. paulensis) Fishery. Braz Arch Biol Technol. 2005; 48(4):611-23.; Severino-Rodrigues, 2007Severino-Rodrigues E, Hebling NJ, Graça-Lopes R. Biodiversidade no produto da pesca de arrasto-de-fundo dirigida ao lagostim Metanephrops rubellus (Moreira, 1903) desembarcado no litoral do Estado de São Paulo, Brasil. B Inst Pesca . 2007; 33(2):171-82.; Quirino-Duarte et al., 2009Quirino-Duarte G, Souza MR, Carneiro MH, Servo GJM. Composição quali-quantitativa da categoria “mistura” na pesca de arrasto duplo de portas médio desembarcada nos municípios de Santos e Guarujá, São Paulo, Brasil. B Inst Pesca . 2009; 35(3):461-74.).

Species were identified using the descriptions and collection keys provided by Figueiredo, Menezes (1978Figueiredo JL, Menezes NA. Manual de peixes marinhos do sudeste do Brasil, II. Teleostei (1). São Paulo: Museu de Zoologia da USP; 1978., 1980Figueiredo JL, Menezes NA. Manual de peixes marinhos do sudeste do Brasil, III. Teleostei (2). São Paulo: Museu de Zoologia da USP ; 1980., 2000Figueiredo JL, Menezes NA. Manual de peixes marinhos do sudeste do Brasil, VI. Teleostei (5). São Paulo: Museu de Zoologia da USP ; 2000.), Menezes, Figueiredo (1980Menezes NA, Figueiredo JL. Manual de peixes marinhos do sudeste do Brasil, IV. Teleostei (3). São Paulo: Museu de Zoologia da Universidade de São Paulo; 1980., 1985Menezes NA, Figueiredo JL. Manual de peixes marinhos do sudeste do Brasil, V. Teleostei (4). São Paulo: Museu de Zoologia da Universidade de São Paulo ; 1985.), Cervigón et al. (1992Cervigón F, Cipriani R, Fischer W, Garibaldi L, Hendrickx M, Lemus AJ, Márquez R, Poutiers JM, Robaina G, Rodriguez B. Guia de campo de las especies comerciales marinas y de aguas salobres de la costa septentrional de Sur America. Roma: Organización de las Naciones Unidas para la Agricultura y la Alimentación; 1992.) Carpenter (2003aCarpenter KE. Introduction, molluscs, crustaceans, hagfishes, batoid fishes, and chimaeras. Rome: Food and Agriculture Organization of the United Nations (FAO); 2003a. (FAO species identification guide for fishery purposes and American Society of Ichthyologists and Hepertologists. The living marine resources of the western Atlantic; vol. 1). Available from: http://www.fao.org/3/y4160e/y4160e00.htm
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,bCarpenter KE. Bony fishes part 1 (Acipenseridae to Grammatidae). Rome: Food and Agriculture Organization of the United Nations (FAO) ; 2003b. (FAO species identification guide for fishery purposes and American Society of Ichthyologists and Hepertologists. The living marine resources of the western Atlantic, vol. 2). Available from: http://www.fao.org/3/y4161e/y4161e00.htm
http://www.fao.org/3/y4161e/y4161e00.htm...
,cCarpenter KE. Bony fishes part 2 (Opistognathidae to Molidae), sea turtles and marine mammals. Rome: Food and Agriculture Organization of the United Nations (FAO) ; 2003c. (FAO species identification guide for fishery purposes and American Society of Ichthyologists and Herpertologists. The living marine resources of the western Atlantic; vol. 3). Available from: http://www.fao.org/3/y4162e/y4162e00.htm
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), Marceniuk (2005Marceniuk AP. Chave para identificação das espécies de bagres marinhos (Siluriformes, Ariidae) da costa brasileira. B Inst Pesca. 2005; 31(2):89-101.), Menezes et al. (2015Menezes NA, Nirchio M, Oliveira C, Siccharamirez R. Taxonomic review of the species of Mugil (Teleostei: Perciformes: Mugilidae) from the Atlantic South Caribbean and South America, with integration of morphological, cytogenetic and molecular data. Zootaxa. 2015; 3918(1):1-38.), Marceniuk et al. (2017Marceniuk AP, Caires RA, Rotundo MM, Alcantara RAK, Wosiacki WB. The icthyofauna (Teleostei) of the rio Caeté estuary, northeast Pará, Brazil, with a species identification key from northern Brazilian coast. Panam J Aquat Sci . 2017; 12(1):31-79.), as well as by comparison with specimens deposited in the ichthyological collections of the Museu de Zoologia da Universidade de São Paulo at São Paulo (MZUSP), AZUSC and LBP, and through consultations with specialists.

Taxonomic procedures. The species recorded in the inventory were grouped by order and family, following Eschmeyer’s Catalog of Fishes (Fricke et al., 2019Fricke R, Eschmeyer WN, van der Laan R, editors. Catalog of fishes: Genera, species, references [Eletronic version]. San Francisco: California Academy of Science; 2019 [cited 2018 Feb 23]. Available from: Available from: http://researcharchive.calacademy.org/research/Ichthyology/catalog/fishcatmain.asp
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), with the genera and species of each family being presented in alphabetical order. The table is annotated with a range of information on each species, including the source of the record, its regional status (endemic, first report), habitat preferences and use (pelagic, demersal, benthic), shoaling behavior, IUCN conservation status, fishery value, and abundance. The data on endemism and the existence of specimens in scientific collections were obtained from the Neodat (http://www.mnrj.ufrj.br/search.htm), SpeciesLink (http://www.splink.org.br/), and FishNet2 (http://www.fishnet2.net) online databases.

The species labelled as “sp.” are new species currently being described by our research team: Bairdiella goeldi (Marceniuk et al., 2019Marceniuk AP, Molina EG, Caires R, Rotundo MM, Wosiacki WB, Oliveira C. Revision of Bairdiella (Sciaenidae, Perciformes) from the western South Atlantic, with insights into its diversity and biogeographical patterns. Neotrop Ichthyol. 2019; 17(1):e180024.), Haemulon sp. (Oliveira et al., in preparation), and Neoconger sp. (Marceniuk et al., in preparation).

Life history traits and conservation status. Habitat categorization was adapted from Gaither et al. (2016Gaither MR, Bowen BW, Rocha LA, Briggs JC. Fishes that rule the world: circumtropical distributions revisited. Fish Fish. 2016; 17(3):664-79.) and we employed herein four basic habitat categories: (i) estuarine, including species found in areas influenced by freshwater; (ii) marine, species found in over coral reefs or rocky bottoms; (iii) marine, not associated with reefs or rocky bottoms (for most of their lives), and (iv) species associated with rocky reefs, but found in estuaries during some life stage. The data on habitat preferences were obtained from recent literature of each species, cited in the Eschmeyer’s Catalog of Fishes (Fricke et al., 2019Fricke R, Eschmeyer WN, van der Laan R, editors. Catalog of fishes: Genera, species, references [Eletronic version]. San Francisco: California Academy of Science; 2019 [cited 2018 Feb 23]. Available from: Available from: http://researcharchive.calacademy.org/research/Ichthyology/catalog/fishcatmain.asp
http://researcharchive.calacademy.org/re...
).

Habitat use was classified as (i) pelagic (upper portion of the water column), (ii) benthic (on the sea floor), and (iii) demersal (lower portion of the water column). This classification and the shoaling habits of the species were derived from the information available in the FishBase (http://www.fishbase.org/search.php) online database. The conservation status of each species was obtained from the IUCN Red List of Threatened Species (http://www.iucnredlist.org), and the inclusion of each species in the Red Book of the Brazilian Fauna Threatened with Extinction (http://www.icmbio.gov.br) was also confirmed.

Distribution and density. The distribution of the different fish species off the northern coast of Brazil was evaluated based on the species life-habitat as defined above. The occurrence of the species in the four categories was mapped, and an exploratory interpolation statistical technique, based on Kernel Density Estimation (KDE), was used to generate a density plot from the distribution points, which permitted the visualization of the areas with more intense occurrence. We estimate bandwidth (influence radius) and K (Kernel) functions for each species community (Hart, Zandbergen, 2013Hart TC, Zandbergen PA. Kernel density estimation and hotspot mapping: Examining the influence of interpolation method, grid cell size, and bandwidth on crime forecasting. Policing. 2014; 37(2):305-23.). The KDE analyses included only the species that had specimens in zoological collection with the coordinates of the catch locality.

Results

Based on the specimens observed (photographed and measured) on board the fishing vessels, and the 2.323 specimens examined in the laboratory, a total of 201 species were identified (Tab. 1, column A), and a further 15 species recorded in previous studies (Oliveira et al., 2004Oliveira GB, Negreiro JA, Santos FJ. Prospecção pesqueira de recursos demersais utilizando rede de arrasto para peixes na zona econômica exclusiva da costa norte do Brasil, Report Revizee Program. Brasília: Ministério do Meio Ambiente ; 2004.; Pinheiro, Frédou, 2004Pinheiro LA, Frédou FL. Caracterização geral da pesca industrial desembarcada no estado do Pará. Revista virtual de Iniciação Científica da Universidade Federal do Pará. 2004; Available from http://www.ufpa.br/revistaic. http://www.cultura.ufpa.br/rcientifica/ed_anteriores/pdf/ed_04_lap.pdf
http://www.ufpa.br/revistaic...
; Maia et al., 2016Maia BP, Nunes ZMP, Holanda FCAF, Silva VHS, Silva BB. Gradiente latitudinal da beta diversidade da fauna acompanhante das pescarias industriais de camarões marinhos da costa norte do Brasil. Biota Amazonica. 2016; 6(1):31-39.), not observed during the present study (Tab. 1, column A). So, the total number of species, based on the present inventory of the fish harvested by the industrial trawling operations and the published data was 216 species. These species represent 64 fish families and 20 orders (Tab. 1). Voucher specimens were deposited in zoological collections, with the exception of the species that were only examined on board the fishing vessels (Tab. 1, column A).

Tab. 1
The bone fishes of the Brazilian North coast. Asterisk corresponds to figures presented in Marceniuk et al. (2017Marceniuk AP, Caires RA, Rotundo MM, Alcantara RAK, Wosiacki WB. The icthyofauna (Teleostei) of the rio Caeté estuary, northeast Pará, Brazil, with a species identification key from northern Brazilian coast. Panam J Aquat Sci . 2017; 12(1):31-79.). A. Source of information: Z = Zoological Collections (present study); O = onboard observers; L = literature. B. Endemic species. C. First record for the Brazilian North coast. D. Occurs in estuaries and areas influenced by freshwater. E. Life habits: P = pelagic, D = demersal, B = benthonic. F. Marine species not associated with coral reefs. G. Occurs in reefs or over rocky bottoms. H. Formation of shoals: (0) does not form shoals, (1) may form shoals, (2) forms major shoals. I. IUCN conservation status (IUCN, 2018International Union for Conservation of Nature (IUCN). The IUCN red list of threatened species. 2018. Available from: http://www.iucnredlist.org
http://www.iucnredlist.org...
) and species included in the Brazilian List of Endangered Fauna (ICMBio, 2018) are marked with an asterisk. CR = Critically Endangered; VU = Vulnerable; NT = Near Threatened; LC = Least Concern; DD = Data Deficient; X = not evaluated. J. Market value: (0) no value, (1) edible, (2) high commercial value. K. Abundance: (0) rare, (1) common, (2) very common.

Fig. 3
Species of the order Elopiformes, family Albulidae, Albula vulpes, MPEG 35222, 308 mm TL.

Fig. 4
Species of the order Anguilliformes, family Heterenchelyidae, (A) Pythonichthys sanguineus, MPEG 35269, 493 mm TL, family Moringuidae, (B) Neoconger sp., AZUSC 4931, 254 mm TL, family Muraenidae, (C) Enchelycore nigricans, AZUSC 5432, 298 mm TL, (D) Gymnothorax conspersus AZUSC 5059, 326 mm TL, (E) Gymnothorax ocellatus AZUSC 5069, 464 mm TL, family Ophichthidae, (F) Aplatophis chauliodus not calaloged, 520 mm TL, (G) Echiophis punctifer MPEG 35510, 932 mm TL, (H) Ophichthus cylindroideus MPEG 35152, 645 mm TL, (I) Ophichthus ophis AZUSC 5179, 1052 mm TL.

Fig. 5
Species of the order Anguilliformes, family Muraenesocidae, (A) Cynoponticus savanna MPEG 35777, 566 mm TL, family Congridae, (B) Paraconger guianensis MPEG 35216, 195 mm TL, (C) Rhynchoconger flavus MPEG 35746, 365 mm TL, family Nettastomatidae, (D) Hoplunnis macrura AZUSC 5670, 320 mm TL.

Fig. 6
Species of the order Clupeiformes, family Clupeidae, (A) Lile piquitinga MPEG 35023, 95 mm TL, family Engraulidae, (B) Anchoa filifera MPEG 35122, 31 mm TL, (C) Anchoa pectoralis not cataloged, 100 mm TL, (D) Anchovia clupeoides not cataloged, 94 mm TL, (E) Anchoviella lepidentostole MPEG 35240, 118 mm TL, family Pristigasteridae, (F) Chirocentrodon bleekerianus MPEG 35674, 108 mm TL, (G) Odontognathus mucronatus MPEG 35048, 142 mm TL, (H) Pellona harroweri MPEG 35700, 136 mm TL, ordem Siluriformes, family Ariidae, (I) Amphiarius phrygiatus MPEG 35077, 345 mm TL, (J) Notarius grandicassis MPEG 35204, 410 mm TL, (K) Sciades couma not cataloged, 423 mm TL.

Fig. 7
Species of the order Aulopiformes, family Synodontidae, (A) Saurida caribbaea MPEG 35598, 94 mm TL, (B) Synodus bondi MPEG 35202, 262 mm TL, (C) Synodus poeyi not cataloged, 160 mm TL, order Holocentriformes, family Holocentridae, (D) Holocentrus adscensionis AZUSC 5180, 210 mm TL, (E) Myripristis jacobus AZUSC 5181, 128 mm TL, order Ophidiiformes, family Ophidiidae, (F) Brotula barbata AZUSC 5141, 202 mm TL, (G) Lepophidium brevibarbe MPEG 35849, 234 mm TL, order Lophiiformes, family Antennariidae, (H) Antennarius striatus MPEG 35201, 114 mm TL, family Ogcocephalidae, (I) Halieutichthys aculeatus MPEG 35851, 36 mm TL, (J) Ogcocephalus nasutus MPEG 35167, 131 TL, (K) Ogcocephalus notatus AZUSC 5068, 120 mm TL, (L) Ogcocephalus pumilus MPEG 34615, 157 mm TL, order Beloniformes, family Exocoetidae, (M) Parexocoetus hillianus not cataloged, 150 mm TL, order Gasterosteiformes, family Fistulariidae, (N) Fistularia petimba AZUSC 5182, 560 mm TL, (O) Fistularia tabacaria AZUSC 5669, 590 mm TL, (O) Scorpaena brasiliensis MPEG 35141, 119 mm TL, (Q) Scorpaena isthmensis AZUSC 5644, 97 mm TL.

Fig. 8
Species of the ordem Perciformes, family Centropomidae, (A) Centropomus ensiferus MPEG 35060, 352 mm TL, family Serranidae, (B) Alphestes afer MPEG 35142, 174 mm TL, (C) Cephalopholis fulva not cataloged, 240 mm TL, (D) Diplectrum radiale MPEG 35149, 221 mm TL, (E) Epinephelus morio AZUSC 5428, 368 mm TL, (F) Hyporthodus nigritus not cataloged, 140 mm TL, (G) Hyporthodus niveatus MPEG 35841, 113 mm TL, (H) Mycteroperca bonaci not cataloged, 420 mm TL, (I) Paralabrax dewegeri AZUSC 5183, 70 mm TL, (J) Paranthias furcifer not cataloged, 270 mm TL, (K) Serranus flaviventris AZUSC 5103, 71 mm TL, (L) Serranus phoebe, AZUSC 5526, 116 mm TL, family Opistognathidae, (M) Lonchopisthus higmani, not cataloged, 80 mm TL, family Priacanthidae, (N) Priacanthus arenatus MPEG 35707 323 TL, family Malacanthidae, (O) Caulolatilus guppyi AZUSC 5668, 180 mm TL, (P) Malacanthus plumieri not cataloged, 420 mm TL, family Pomatomidae, (Q) Pomatomus saltatrix not cataloged, 380 mm TL, family Echeneidae, (R) Echeneis naucrates MPEG 35159, 296 mm TL.

Fig. 9
Species of the order Perciformes, family Carangidae, (A) Alectis ciliaris MPEG 35701, 221 mm TL, (B) Caranx bartholomaei MPEG 35181, 323 mm TL, (C) Caranx crysos MPEG 35183, 350 mm TL, (D) Decapterus macarellus not cataloged, 220 mm TL, (E) Decapterus punctatus AZUSC 5551, 176 mm TL, (F) Decapterus tabi not cataloged, 240 mm TL, (G) Oligoplites saliens AZUSC 4660, 280 mm TL, (H) Selar crumenophthalmus MPEG 35137, 266 mm TL, (I) Selene setapinnis MPEG 35190, 243 mm TL, (J) Seriola dumerili not cataloged, 200 mm TL, (K) Trachinotus cayennensis MPEG 34410, 265 mm TL.

Fig. 10
Species of the order Perciformes, family Chaetodontidae, (A) Chaetodon ocellatus MPEG 35121, 91 mm TL, (B) Chaetodon sedentarius not cataloged, 150 mm TL, order Perciformes, family Lutjanidae, (C) Lutjanus apodus MPEG 34520, 272 mm TL, (D) Lutjanus campechanus, AZUSC 5483, 330 mm TL, (E) Lutjanus cyanopterus not cataloged, 490 mm TL, (F) Lutjanus vivanus MPEG 35576, 283 mm TL, (G) Ocyurus chrysurus not cataloged, 260 mm TL, (H) Pristipomoides aquilonaris AZUSC 5186, 200 mm TL, (I) Rhomboplites aurorubens not cataloged, 330 mm TL, family Gerreidae, (J) Diapterus rhombeus MPEG 35191, 192 mm TL, family Haemulidae, (K) Haemulon aurolineatum not cataloged, 170 mm TL, (L) Haemulon carbonarium not cataloged, 260 mm TL, (M) Haemulon sp. MPEG 35708, 189 mm TL, (N) Orthopristis scapularis MPEG 35647, 185 mm TL.

Fig. 11
Species of the order Perciformes, family Pomacanthidae, (A) Holacanthus ciliaris not cataloged, 350 mmm TL, family Polynemidae, (B) Polydactylus virginicus MPEG 35182 306 mm TL, family Scaridae, (C) Sparisoma axillare not cataloged, 170 mm TL, family Sparidae, (D) Sparisoma frondosum AZUSC 5446, 120 mm TL, (E) Calamus penna MPEG 35709, 226 mm TL, (F) Calamus pennatula not cataloged, 230 mm TL.

Fig. 12
Species of the order Perciformes, family Sciaenidae, (A) Ctenosciaena gracilicirrhus MPEG 35609, 145 mm TL, (B) Cynoscion acoupa not cataloged, 310 mm TL, (C) Cynoscion jamaicensis MPEG 35588 173 mm TL, (D) Cynoscion leiarchus MPEG 35229 183 mm TL, (E) Cynoscion microlepidotus not cataloged, 320 mm TL, (F) Cynoscion similis MPEG 35042 254 mm TL, (G) Cynoscion steindachneri not cataloged, 250 mm TL, (H) Cynoscion virescens not cataloged, 340 mm TL, (I) Isopisthus parvipinnis MPEG 35051, 175 mm TL, (J) Larimus breviceps MPEG s/n, 150 mm TL, (K) Macrodon ancylodon MPEG 35059, 230 mm TL, (L) Ophioscion punctatissimus AZUSC 5178, 160 mm TL.

Fig. 13
Species of the order Perciformes, family Mullidae, (A) Upeneus parvus AZUSC 5445, 167 mm TL, family Kyphosidae, (B) Kyphosus vaigiensis MPEG 35156, 524 mm TL, family Gobiidae, (C) Priolepis dawsoni not cataloged, AZUSC 5667, 80 mm TL, family Acanthuridae, (D) Acanthurus chirurgus MPEG 35178, 85 mm TL, family Sphyraenidae, (E) Sphyraena guachancho MPEG 35063, 297 mm TL.

Fig. 14
Species of the order Pleuronectiformes, family Paralichthyidae, (A) Citharichthys arenaceus MPEG 35148, 109 mm TL, (B) Citharichthys macrops AZUSC 5119, 77 mm TL, (C) Cyclopsetta chittendeni MPEG 35119, 293 mm TL, (D) Etropus crossotus MPEG xxx mm TL, (E) Syacium papillosum MPEG 35559, 179 mm TL, family Achiridae, (F) Achirus declivis AZUSC 5461, 150 mm TL, (G) Achirus lineatus MPEG 35113, 173 mm TL, (H) Gymnachirus nudus not cataloged, 150 mm TL, (I) Trinectes paulistanus MPEG 35762, 190 mm TL, family Cynoglossidae, (J) Symphurus oculellus AZUSC 4935 4935, 119 mm TL, (K) Symphurus tesselatus MPEG 35503, 202 mm TL.

Fig. 15
Species of the Ordem Batrachoidiformes, family Batrachoididae, (A) Amphichthys cryptocentrus not cataloged, 240 mm TL, (B) Porichthys plectrodon MPEG 35664, 43 mm TL, (C) Thalassophryne nattereri not cataloged, 140 mm TL, Ordem Scombriformes, family Scombridae, (D) Acanthocybium solandri not cataloged, 450 mm TL, (E) Euthynnus alletteratus not cataloged, 390 mm TL, (F) Scomberomorus brasiliensis MPEG 35108, 509 mm TL, (G) Scomberomorus cavalla not cataloged, 420 mm TL, (H) Thunnus atlanticus not cataloged, 480 mm TL, Ordem Syngnathiformes, family Syngnathidae, (I) Hippocampus reidi, AZUSC 5388, 98 mm TL.

Fig. 16
Species of the order Tetraodontiformes, family Balistidae, (A) Balistes capriscus MPEG 33692, 259 mm TL, (B) Balistes vetula not cataloged, 180 mm TL, family Monacanthidae, (C) Aluterus heudelotii, AZUSC 5494, 350 mm TL, (D) Aluterus monoceros MPEG 35756, 481 mm TL, (E) Aluterus scriptus not cataloged, 360 mm TL, (F) Cantherrines macrocerus not cataloged, 220 mm TL, family Ostraciidae, (G) Acanthostracion polygonius MPEG 35154, 161 mm TL, (H) Acanthostracion quadricornis MPEG 35174, 276 mm TL, (I) Lactophrys trigonus AZUSC 5188, 180 mm TL, family Tetraodontidae, (J) Lagocephalus laevigatus MPEG 35175, 340 mm TL, (K) Sphoeroides dorsalis not cataloged, 60 mm TL, family Diodontidae, (L) Chilomycterus reticulatus MPEG 35614, 206 mm TL, (M) Chilomycterus spinosus MPEG 35562, 138 mm TL, (N) Chilomycterus antillarum MPEG 35185, 182 mm TL.

Considering the complete data set (present study plus published data), the most diverse families are the Sciaenidae (21 spp.), Carangidae (21 spp.), Engraulidae (10 spp.), Serranidae (12 spp.), Haemulidae (10 spp.), and Lutjanidae with nine species (Tab. 1). Overall, 17 (7.9%) of the 216 species are endemic to the Orinoco-Amazon plume (Tab. 1, column B), 64 (29.6%) are found throughout the entire Atlantic coast of the Americas, 65 (30.1%) are distributed between the Caribbean and the Atlantic South America (not found in Golf of Mexico), and 111 species (51.4%) range between the Caribbean and Brazilian southeast coast (not found in Argentina Province). Overall, 42 (19.4%) of the 216 species were recorded from the North coast of Brazil (in zoological collections) for the first time (Tab. 1, column C), and five species (Pythonichthys sanguineus, Aplatophis chauliodus, Lonchopisthus higmani, Caulolatilus guppyi, and Ogcocephalus pumilus) had not previously been recorded in Brazil (Menezes et al., 2003Menezes NA, Buckup PA, Figueiredo JL, Moura RL. Catálogo das espécies de peixes marinhos do Brasil. São Paulo: Universidade de São Paulo. 2003.).

Just over half (n = 114, 52.8%) of the species recorded here are found exclusively in marine habitats (Tab. 1, column F and G), of which, 72 (33.3%) are associated with coral reefs or rocky bottoms (Tab. 1, column G). The remaining 102 species (47.2%) have some association with estuaries or freshwater habitats (Tab. 1, column D), although 21 are also found on coral reefs during at least one stage of their life history (Tab. 1, column D and G). Over half (n = 117, 54.2%) of the species are also demersal and just under a third (n = 63, 29.2%) are pelagic, while the remaining 38 species (17.6%) are benthic (Tab. 1, column E). Most (143 species, 66.2%) species form shoals, and 49 of form major shoals (Tab. 1, column H).

Nineteen species (8.3%) are listed as threatened or endangered (Tab. 1, column I). With the exception of three species, Epinephelus itajara (Lichtenstein, 1822) (CR), which is very common in the estuaries of the North coast (Marceniuk et al., 2017Marceniuk AP, Caires RA, Rotundo MM, Alcantara RAK, Wosiacki WB. The icthyofauna (Teleostei) of the rio Caeté estuary, northeast Pará, Brazil, with a species identification key from northern Brazilian coast. Panam J Aquat Sci . 2017; 12(1):31-79.), Lutjanus synagris (Linnaeus, 1758) (NT) and Pomatomus saltatrix (Linnaeus, 1766) (VU), all these listed taxa were few common in the trawls (Tab. 1, column K).

Density estimates. Kernel density maps were generated for 68 estuarine species (Fig. 1B), 39 marine species not associated with coral reef (Fig. 1E), 49 species associated with reefs and/or rocky bottoms (Fig. 1D), and 20 estuarine species that are also found in coral reefs (Fig. 1C). The Kernel density map of the estuarine species shows three areas of high species concentration south of the shrimp fishery zone, primarily on the coast of Pará, with no overlap with the area of coral reef. The marine species also presented three focal areas, distributed in a north-south orientation, off the coasts of both Amapá and Pará, and overlapping the area of coral reef. The species associated with reefs and/or rocky bottoms also had three focal points, one off Amapá and two off Pará, with the latter being more concentrated and overlapping more with the coral reef. The estuarine species associated with reefs had the smallest bandwidth, with only one area of high concentration, off the coast of Pará, but with no overlap with the coral reef.

Discussion

The bony fish diversity and bycatch caught by industrial trawlers off the Brazilian North coast. The present study revealed the presence of a unique fish fauna that is caught by bottom trawlers off the northern coast of Brazil, which includes 17 endemic species (7.9%) to the Orinoco-Amazon plume, and a mixture of estuarine (102 spp., 47.2%) and exclusively marine species (114 spp., 52.8%), of which 72 are associated with coral reefs. The greater species richness recorded in northern Brazil is likely related to the environmental characteristics of this region, in particular, the enormous input of nutrients and sediment from the Amazon River and coastal drainage basins, which favor the occurrence in the region of estuarine fish. The region’s diversity may be further reinforced by the local mangroves, including the world’s largest continuous tract of mangrove forest (Schaffer-Novelli et al., 2000Schaeffer-Novelli Y, Cintrón-Molero G, Soares MLG, de Rosa T. Brazilian mangroves. Aquat Ecosyst Health Manag. 2000; 3:561-70.), and the Great Amazon Reef System (Moura et al., 2016Moura RL, Amado-Filho GM, Moraes FC, Brasileiro PS, Salomon PS, Mahiques MM et al. An extensive reef system at the Amazon River mouth. Sci Adv, 2016; 2(4):e1501252.; Francini-Filho et al., 2018Francini-Filho RB, Asp NE, Siegle E, Hocevar J, Lowyck K, D’Avila N et al. Perspectives on the great Amazon reef: Extension, biodiversity, and threats. Front Mar Sci. 2018; 5(142):1-5.), given that a third of the species recorded here are associated with reefs. Overall, the results of the Kernel density analysis indicate that the industrial trawling fleet off the North Coast of Brazil operates within an important ecotone, which encompasses the transition zones of different fish communities.

The biological diversity of the region is further reinforced when the findings are compared with the trawl bycatch data from southeastern Brazil, the most comprehensive of any Brazilian region (Graça-Lopes et al., 2002Graça-Lopes R, Tomás ARG, Tutui SLS, Severino-Rodrigues E, Puzzi A. Fauna acompanhante da pesca camaroneira no litoral do Estado de São Paulo, Brasil. Bol Inst Pesca, São Paulo. 2002; 28(2):173-88; Vianna, Almeida, 2005Vianna M, Almeida T. Bony fish bycatch in the Southern Brazil pink shrimp (Farfantepenaeus brasiliensis and F. paulensis) Fishery. Braz Arch Biol Technol. 2005; 48(4):611-23.; Severino-Rodrigues, 2007Severino-Rodrigues E, Hebling NJ, Graça-Lopes R. Biodiversidade no produto da pesca de arrasto-de-fundo dirigida ao lagostim Metanephrops rubellus (Moreira, 1903) desembarcado no litoral do Estado de São Paulo, Brasil. B Inst Pesca . 2007; 33(2):171-82.; Quirino-Duarte et al., 2009Quirino-Duarte G, Souza MR, Carneiro MH, Servo GJM. Composição quali-quantitativa da categoria “mistura” na pesca de arrasto duplo de portas médio desembarcada nos municípios de Santos e Guarujá, São Paulo, Brasil. B Inst Pesca . 2009; 35(3):461-74.), which include only 156 species, in comparison with the 216 recorded here. While on the North coast, for example, just under half (102 spp., 47.2%) of the species are tolerant of brackish waters, little more than a third (55 spp., 36.2%) of the species from the southeastern coast of Brazil fall into this category, while 63.8% are found exclusively in marine habitats (vs. 114 spp, 52.8% in Brazilian North coast). Species associated with reefs or rocky bottoms, including 72. (33.3%) from the North coast, and 50 (32.9%) on the southeastern coast. By contrast, pelagic fish were almost half as common again in northern Brazil (63 spp., 29.2%) as they are on the southeastern coast (32 spp., 20.5%). There was much less difference, however, in the proportions of demersal (60.9% southeast vs. 53.2% north) and benthic species (19.2% southeast vs. 17.6% north). Differences in the ecological diversity of the two fish faunas affected by trawler bycatch may be related to the variation in the characteristics of the continental shelf, the type of sediment, oceanographic conditions, historical events, and temperature (Lowe-McConnell, 1987Lowe-McConnel RH. Ecological studies in tropical fish communities. Cambridge University Press; 1987., Longhurst, Pauly, 2007Longhurst AR, Pauly D. Ecologia de oceanos tropicais. São Paulo, Edusp; 2007. 419p., Mora et al., 2007Mora C, Tittensor DP, Myers RA. The completeness of taxonomic inventories for describing the global diversity and distribution of marine fishes. Proc R Soc Lond B Biol Sci. 2007; 275(1631):149-55.).

The conservation of bycatch fish species in northern Brazil. The recognition of distinct communities affected by industrial trawling operations is fundamental to the effective management of local stocks and the biota impacted by the industrial fisheries of northern Brazil. One important aspect of these communities that requires further investigation is the possible temporal variation in the distribution of these communities are influenced differentially by the region’s marked seasonal fluctuations in precipitation levels. Breeding patterns in most coastal and estuarine species tend to be synchromized with the rainy season, for example, which lasts from December to May on the Amazon coast, whereas marine species associated with coral reefs typically reproduce during the dry season, when precipitation rates are lower, that is, between June and November.

One other important question is that, while most species have wide geographic distribution, a considerable proportion of the fishes recorded here are endemic to the Amazon-Orinoco plume. These species are thus restricted to an area that is trawled intensively, and in many cases, nothing is known of their life cycles.

The Brazilian national plan for the sustainable exploitation of marine shrimp (Neto, 2011Neto JD, organizer. Proposta de Plano Nacional de Gestão para o uso sustentável de camarões marinhos do Brasil. Brasília: Diretoria de Uso Sustentável da Biodiversidade e Floresta; 2011.) considers that the harvesting of pink-shrimp is responsible for the unintentional capture of more than 100 fish species. On the North coast alone, Isaac, Braga (1999Isaac VJ, Braga TMP. Rejeição de pescado nas pescarias da região norte do Brasil. Ar Ciên Mar. 1999; 21:39-54.) estimated that at least 150 species (which were not listed) of aquatic organisms are caught in trawls, of which 80% are teleost fish, that is, approximately 120 species (Damasceno, Evangelista, 1991Damasceno FG, Evangelista JEV. Composição estrutura e volume da fauna acompanhante da pesca industrial de camarão no litoral norte do Brasil. Belém: IBAMA; 1991.). While previous studies have referred to the enormous diversity of fish species found off the northern Brazilian coast (Maia et al., 2016Maia BP, Nunes ZMP, Holanda FCAF, Silva VHS, Silva BB. Gradiente latitudinal da beta diversidade da fauna acompanhante das pescarias industriais de camarões marinhos da costa norte do Brasil. Biota Amazonica. 2016; 6(1):31-39.), the diversity of the fish fauna harvested by trawlers off the North coast of Brazil, has never been systematically assessed, with most of the available data limited to commercially-valuable species, which are not discarded during the fishery operations (Oliveira et al., 2004Oliveira GB, Negreiro JA, Santos FJ. Prospecção pesqueira de recursos demersais utilizando rede de arrasto para peixes na zona econômica exclusiva da costa norte do Brasil, Report Revizee Program. Brasília: Ministério do Meio Ambiente ; 2004.; Pinheiro, Frédou, 2004Pinheiro LA, Frédou FL. Caracterização geral da pesca industrial desembarcada no estado do Pará. Revista virtual de Iniciação Científica da Universidade Federal do Pará. 2004; Available from http://www.ufpa.br/revistaic. http://www.cultura.ufpa.br/rcientifica/ed_anteriores/pdf/ed_04_lap.pdf
http://www.ufpa.br/revistaic...
; Maia et al., 2016Maia BP, Nunes ZMP, Holanda FCAF, Silva VHS, Silva BB. Gradiente latitudinal da beta diversidade da fauna acompanhante das pescarias industriais de camarões marinhos da costa norte do Brasil. Biota Amazonica. 2016; 6(1):31-39.). The results of the present study provide the most comprehensive inventory of the teleost fish fauna harvested by trawlers on the continental shelf of the North coast of Brazil, even including the data provided by the REVIZEE program (Lucena, Asano-Filho, 2006Lucena FM, Asano-Filho M. Recursos pesqueiros da região norte. In: Jablonski S, Rossi-Wongtschowski CLDB, Haimovici M, Lessa RP, Martins A, Ávila R, Frédou FL, organizers. Programa Revizee: Avaliação do Potencial Sustentável de Recursos Vivos na Zona Econômica Exclusiva (Relatório Executivo). Brasília: Ministério do Meio Ambiente; 2006. p. 127-155.), reinforcing the existence of a major lacuna in the scientific inventory of the marine-estuarine fishes of the North coast of Brazil (Marceniuk et al., 2013Marceniuk AP, Caires RA, Wosiacki WB, Di Dario F. Conhecimento e conservação dos peixes marinhos e estuarinos (Chondrichthyes e Teleostei) da Costa Norte do Brasil. Biota Neotrop. 2013; 13:251-59.; 2017Marceniuk AP, Caires RA, Rotundo MM, Alcantara RAK, Wosiacki WB. The icthyofauna (Teleostei) of the rio Caeté estuary, northeast Pará, Brazil, with a species identification key from northern Brazilian coast. Panam J Aquat Sci . 2017; 12(1):31-79.), given, in particular, that 42 (19.4%) of the species were recorded in zoological collections for the first time, including five species that had not been registered previously in Brazil (see Menezes et al., 2003Menezes NA, Buckup PA, Figueiredo JL, Moura RL. Catálogo das espécies de peixes marinhos do Brasil. São Paulo: Universidade de São Paulo. 2003.).

The definition of the composition of the different fish communities is fundamental to the decision-making necessary for the conservation of the environment and the biota impacted by trawling operations, given that these communities may be characterized by temporal or spatial transitions (Sepkoski, 1988Sepkoski Junior J. Alpha, beta, or gamma: where does all the diversity go? Paleobiology. 1988; 14(3):221-34.; Williams, 1996Williams PH. Mapping variations in the strength and breadth of biogeographic transition zones using species turnover. Proc R Soc Lond B Biol Sci . 1996; 263(1370):579-88.), mosaics of habitat partitioning, and edge effects (Harrison, 1997Harrison S. How natural habitat patchiness affects the diversity of Californian serpentine chaparral. Ecol. 1997; 78:898-906.; Fahr, Kalko, 2011Fahr J, Kalko EKV. Biome transitions as centres of diversity: Habitat heterogeneity and diversity patterns of West African bat assemblages across spatial scales. Ecography, 2011; 34:177-95.). The present study represents an important contribution to the understanding of this process, showing that a considerable proportion of the species harvested by the industrial trawling fleet of northern Brazil are associated with estuarine environments, reflecting the dominant conditions of Amazon-Orinoco plume (Camargo, Isaac, 2001Camargo M, Isaac VJ. Os estuarinos da região norte do Brasil: espécies e considerações sobre sua distribuição geográfica. Bol. Mus. Para. Emílio Goeldi 2001; 17(2):135-57.; Marceniuk et al., 2013Marceniuk AP, Caires RA, Wosiacki WB, Di Dario F. Conhecimento e conservação dos peixes marinhos e estuarinos (Chondrichthyes e Teleostei) da Costa Norte do Brasil. Biota Neotrop. 2013; 13:251-59.), while a second key group is composed of reef-dwelling species. In this sense, the results of the Kernel density analysis indicate that the industrial trawling fleet of the North Coast of Brazil operates within an important ecotone, which encompasses the transition zones of different fish communities.

It is important to note that the monitoring of fisheries is one of the most effective strategies for the sampling of aquatic communities for biological studies, providing data on population parameters and the impact of fishery operations (Shepherd, 1984Shepherd JG. The Availability and information content of fisheries data. In: May RM, editor. Exploitation of marine communities. Berlin: Springer-Verlag; 1984. p.95-109., 1988Shepherd JG. Fish stock assessments and their data requirements. In: Gulland JA, editor. Fish population dynamics: the implications for management. London: John Willey & Sons; 1988. p.35-62.). Samples obtained from fisheries also provide an important tool for the diagnosis of the biological diversity of areas that are poorly-sampled or where financial resources are insufficient for scientific cruises.

Acknowledgments

This study was supported by the National Science and Technology Council of the Brazilian Federal Government (CNPq grant no. 300462/2016-6 to APM), and the Pará State Research Foundation (FAPESPA grant no. ICAAF 017/2016 to APM). We wish to express our thanks to Projeto Areas Marinhas e Costeiras Protegidas - GEF Mar of the Federal Government, responsible for all material examined.

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Edited by

Francisco Araújo

Publication Dates

  • Publication in this collection
    19 June 2019
  • Date of issue
    2019

History

  • Received
    27 Mar 2018
  • Accepted
    31 Mar 2019
Sociedade Brasileira de Ictiologia Neotropical Ichthyology, Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura, Universidade Estadual de Maringá., Av. Colombo, 5790, 87020-900, Phone number: +55 44-3011-4632 - Maringá - PR - Brazil
E-mail: neoichth@nupelia.uem.br