Resumo
The reproductive cycle of the marine catfishes Genidens genidens Valenciennes, 1833 and Cathorops spixii Agassiz, 1839 in the Sepetiba Bay, was assessed by an annual period of sampling from October 1993 to September 1994. The fishes were caught by standardized otter trawl and environmental parameters of temperature, salinity and transparency of water were recorded at each sampling. Five gonadal phases were described, based in macroscopic observations. Changes in the gonadosomatic index (GSI) and in the percentual of stages of gonadal development showed that G. genidens spawns in Summer/early Autumn, coinciding with low salinity and high temperature and transparency. Cathorops spixii spawns in late Spring/early Summer, coinciding with rising temperature and transparency and low salinity. Total spawning are shown for both species, as indicated by length-frequency of oocytes per stages of maturation with two groups synchronic development of oocytes. Fecundity is low (10-23 oocytes, for G. genidens and 24-30 for C. spixii), when compared with other teleosteans, and was not strongly correlated to the total length (G. genidens, r=0.65, C. spixii, r=0.76). Strategy-k is developed by both species as indicated by high brood and enbrions protection and high body length.
Siluriformes; Ariidae; reproduction; Marine Catfish; Sepetiba Bay
Siluriformes; Ariidae; reproduction; Marine Catfish; Sepetiba Bay
Biologia reprodutiva dos bagres marinhos Genidens genidens (Valenciennes) e Cathorops spixii (Agassiz) (Siluriformes, Ariidae), na Baía de Sepetiba, Rio de Janeiro, Brasil
Reproductive biology of the marine catfish Genidens genidens Valenciennes and Cathorops spixii Agassiz (Siluriformes, Ariidae) in the Sepetiba Bay, Rio de Janeiro, Brazil
Iracema David Gomes; Francisco Gerson Araújo; Marcia Cristina Costa de Azevêdo; André Luiz Machado Pessanha
Laboratório de Ecologia de Peixes, Posto de Aquicultura, Universidade Federal Rural do Rio de Janeiro. Antiga Rodovia Rio-São Paulo, Km 47, 23851-970 Seropédica, Rio de Janeiro, Brasil. E-mail: gerson@ufrrj.br
ABSTRACT
The reproductive cycle of the marine catfishes Genidens genidens Valenciennes, 1833 and Cathorops spixii Agassiz, 1839 in the Sepetiba Bay, was assessed by an annual period of sampling from October 1993 to September 1994. The fishes were caught by standardized otter trawl and environmental parameters of temperature, salinity and transparency of water were recorded at each sampling. Five gonadal phases were described, based in macroscopic observations. Changes in the gonadosomatic index (GSI) and in the percentual of stages of gonadal development showed that G. genidens spawns in Summer/early Autumn, coinciding with low salinity and high temperature and transparency. Cathorops spixii spawns in late Spring/early Summer, coinciding with rising temperature and transparency and low salinity. Total spawning are shown for both species, as indicated by length-frequency of oocytes per stages of maturation with two groups synchronic development of oocytes. Fecundity is low (10-23 oocytes, for G. genidens and 24-30 for C. spixii), when compared with other teleosteans, and was not strongly correlated to the total length (G. genidens, r=0.65, C. spixii, r=0.76). Strategy-k is developed by both species as indicated by high brood and enbrions protection and high body length.
Key words: Siluriformes, Ariidae, reproduction, Marine Catfish, Sepetiba Bay.
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Recebido em 27.V.1998; aceito em 19.XI.1999.
Referências bibliográficas
- Andreata, J.V.; L.R. Barbieri; A.S.B. Sebilia; M.H.C. da Silva & R.P. dos Santos. 1989. A list of Marapendi Lagoon fishes, Rio de Janeiro, Brazil. Atlântica, Rio Grande, 11: 5-17.
- Araújo, F.G. 1988. Distribuição, abundância relativa e movimentos sazonais de bagres marinhos (Siluriformes, Ariidae) no estuário da Lagoa dos Patos (RS), Brasil. Revta bras. Zool. 5 (4): 509-543.
- ______ . 1998. Maturação e desova do bagre marinho Genidens genidens Valenciennes, 1833 (Siluriformes, Ariidae) na Baía de Sepetiba, RJ. Acta Biol. Leopoldensia 20(1): 109-122.
- Barbieri, L.R.; R.P.J. dos Santos & J.V. Andreata. 1992. Reproductive biology of the marine catfish, Genidens genidens (Siluriformes, Ariidae), in the Jacarepaguá lagoon system, Rio de Janeiro, Brazil. Environ. Biol. Fishes 35: 23-35.
- Chaves, P.T.C. 1994. A incubação de ovos e larvas em Genidens genidens (Valenciennes) (Siluriformes, Ariidae) da Baía de Guaratuba, Paraná, Brasil. Revta bras. Zool. 11 (4): 641-648.
- Coelho, V.M.B. & R.R. Carvalho. 1973. Levantamento sanitário da Baía de Sepetiba e suas possibilidades como corpo receptor de cargas poluidoras da região. Publ. Avuls. FEEMA, 87p.
- DHN. 1984. Baía de Sepetiba. Carta náutica. Rio de Janeiro, Diretoria de Hidrografia e Navegação, N. 1621.
- Figueiredo, J.L. & N.A. Menezes. 1978. Manual de peixes marinhos do sudeste do Brasil. II. Teleostei (1). São Paulo, Museu de Zoologia da Universidade de São Paulo, 110p.
- Gunter, G. 1947. Observations on breeding of the marine catfish, Galeichthysfelis (Linneaus). Copeia 1947: 217-223.
- Mishima, M. & S. Tanji. 1981. Distribuição geográfica dos bagres marinhos (Osteichthyes, Ariidae) no complexo lagunar de Cananéia (25ºS, 48ºW). Boletim Instituo de Pesca 9: 131-40.
- ______ . 1983. Maturação e desova dos bagres marinhos (Osteichthyes, Ariidae) do complexo lagunar de Cananéia (25ºS, 48ºW). Bol. Inst. Pesca 10: 129-141.
- Reis, E.G. 1986a. A pesca artesanal de bagres marinhos (Silurifornes, Ariidae) no estuário da Lagoa dos Patos (RS), Brasil. Rio Grande, FURG, Documentos técnicos 5, 22p.
- ______ . 1986b. Reproduction and feeding habits of the marine catfish Netuma barba (Siluriformes, Ariidae), in the estuary of Lagoa dos Patos, Brasil. Atlântica, Rio Grande, 8: 35-55.
- Vazzoler, A.M.A. de M. 1982. Manual e métodos para estudos biológicos de populações de peixes. Reprodução e crescimento. Brasília, CNPq/Programa Nacional de Zoologia, 108p.
- ______ . 1996. Biologia da reprodução de peixes teleósteos: teoria e prática. Maringá, Editora Universidade Estadual de Maringá e Sociedade Brasileira de Ictiologia, 169p.
- Yamamoto, K. 1970. Reproduction, p. 233-371. In. N. Kawamoto (Ed.). Gyorui seiri (Fish physiology). Tokyo, Koseisha-Koseikaku, 482p.
- Yañez-Arancibia, A. & P. Sànchez-Gil. 1988. Ecologia de los recursos demersales marinos. México, AGT Editor S.A., 228p.
Datas de Publicação
-
Publicação nesta coleção
04 Jun 2009 -
Data do Fascículo
1999
Histórico
-
Aceito
19 Nov 1999 -
Recebido
27 Maio 1998