Resumo
Emerita brasiliensis Schmitt, 1935 is a common mole crab called "tatuíra" in Brazil, with distribution from Espírito-Santo State (Brazil) to Buenos Aires Province (Argentina). Specimens were collected bimonthly from May/1992 through March/1993 with 4mm siffers mesh, in the intertidal region at Vermelha do Norte Beach, Ubatuba, São Paulo, Brazil. The animals were sexed and measured with a precision caliper of 0.1 mm (Cl = carapace length). Males presented cl amplitude from 3.4-17.3mm (13.2±2.1mm), and females from 13.8-26.3mm (20.5±1.8mm), showing a well-defined sexual dimorfism for this variable. The population presented a smaller incidence of males in relation to females (0.54:1.00), however in May/1992 an inverse pattern occurred (1.84:1.00). Ovigerous females were present in all samples with exception of May and September/1992 with greater frequencies in July/1992 and January/1993. It is probable that female maturity occurs is reached with 17mm CL, the smallest size in wich ovigerous females were found.
Hippidae; Emerita brasiliensis; population structure; sex-ratio
Hippidae; Emerita brasiliensis; population structure; sex-ratio
Biologia populacional de Emerita brasiliensis Schmitt (Crustacea, Hippidae) na Praia Vermelha do Norte, Ubatuba (São Paulo, Brasil)
Population biology of Emerita brasiliensis Schmitt (Crustacea, Hippidae) in Vermelha do Norte beach, Ubatuba (São Paulo, Brazil)
Jelly Makoto NakagakiI,III; Marcelo Antonio Amaro PinheiroII,III
IUnidade de Jardim, Universidade Estadual de Mato Grosso do Sul. Avenida 11 de dezembro, 79240-000 Jardim, Mato Grosso do Sul, Brasil
IIDepartamento de Biologia Aplicada, FCAVJ, Universidade Estadual Paulista. 14870-000 Jaboticabal, São Paulo, Brasil
IIINúcleo de Estudos em Biologia, Ecologia e Cultivo de Crustáceos (NEBECC)
ABSTRACT
Emerita brasiliensis Schmitt, 1935 is a common mole crab called "tatuíra" in Brazil, with distribution from Espírito-Santo State (Brazil) to Buenos Aires Province (Argentina). Specimens were collected bimonthly from May/1992 through March/1993 with 4mm siffers mesh, in the intertidal region at Vermelha do Norte Beach, Ubatuba, São Paulo, Brazil. The animals were sexed and measured with a precision caliper of 0.1 mm (Cl = carapace length). Males presented cl amplitude from 3.4-17.3mm (13.2±2.1mm), and females from 13.8-26.3mm (20.5±1.8mm), showing a well-defined sexual dimorfism for this variable. The population presented a smaller incidence of males in relation to females (0.54:1.00), however in May/1992 an inverse pattern occurred (1.84:1.00). Ovigerous females were present in all samples with exception of May and September/1992 with greater frequencies in July/1992 and January/1993. It is probable that female maturity occurs is reached with 17mm CL, the smallest size in wich ovigerous females were found.
Key words: Hippidae, Emerita brasiliensis, population structure, sex-ratio.
Texto completo disponível apenas em PDF.
Full text available only in PDF format.
Recebido em 22.I.1999; aceito em 16.XI.1999.
- Ansell, A.D.; P. SIVADAS; B. Narayanan & A. Trevallion. 1972. The ecology of two sandy beaches in South West India. II. Notes on Emerita holthuisi. Mar. Biol. 17: 311-317.
- Barnes, N.B. & A.M. Wenner. 1968. Seasonal variation in the sand crab Emerita analoga (Decapoda, Hippidae) in the Santa Barbara area of California. Limnol. Oceanog. 13: 465-475.
- Bowman, M.L. & R. Dolan. 1985. The relationship of Emerita talpoida to beach characteristics. Jour. Coastal Res. 1 (2): 151-163.
- Efford, I.E. 1967. Neoteny in sand crabs of the genus Emerita (Anomura, Hippidae). Crustaceana 13: 81-93.
- ______ . 1970. Recruitment to sedentary marine populations as exemplified by the sand crab, Emerita analoga (Decapoda, Hippidae). Crustaceana 18: 293-308.
- ______ . 1976. Distribution of the sand crabs in the genus Emerita (Decapoda, Hippidae). Crustaceana 30 (2): 169-183.
- Haley, S.R. 1982. Zonation by size of the pacific mole crab, Hippa pacifica Dana (Crustacea: Anomura: Hippidae), in Hawaii. Jour. Exp. Mar. Biol. Ecol. 58: 221-231.
- MacGinitie, G.E. 1938. Movements and mating habits of the sand crab, Emerita analoga. Amer. Midl. Nat. 19: 471-481.
- Penchaszadeh, P.E. 1971. Observaciones cuantitativas preliminares en playas arenosas de la Costa Central del Peru con especial referencia a las poblaciones de muy-muy (Emerita analoga) (Crustacea, Anomura, Hippidae). Inst. Biol. Mar. (Mar del Plata) Contrib. 177: 1-16.
- Pinheiro, M. A.A.; A. Fransozo & M.L. Negreiros-Fransozo. 1994. Estimativa da duração larval em função da temperatura para a Família Majidae (Crustacea, Decapoda, Brachyura). Bol. Inst. Pesca, São Paulo, 21: 75-81.
- Sastre, M.P. 1991. Sex specific growth and survival in the mole crab Emerita potoricensis (Schmitt). Jour. Crust. Biol. 11 (1): 103-112.
- Subramoniam, T. 1977. Aspects of sexual biology of the anomuran crab Emerita asiatica. Mar. Biol. 43: 369-377.
- ______ . 1981. Protandric hermaphroditism in a mole crab, Emerita asiatica (Decapoda, Anomura). Biol. Bull. 160 (1): 161-174.
- Veloso, V.G. & D.K. Calazans. 1992. Descrição dos estágios larvais de Emerita brasiliensis Schmitt, 1935 (Decapoda: Hippidae) através de plancton, Rio Grande - RS. Nerítica 7: 133-145.
- Veloso, V.G. & J.L. Valentin. 1993. Larval distribution and seasonal abundance of Emerita brasiliensis Schmitt, 1935 (Decapoda, Hippidae) in southern Brazil. Rev. Brasil. Biol. 53 (1): 131-141.
- Wenner, A.M. 1972. Sex ratio as a function of size in marine crustacea. Amer. Natur. 106: 321-350.
- Wenner, A.M. & S.R. Haley. 1981. On the question of sex reversal in mole crabs (Crustacea, Hippidae). Jour. Crust. Biol. 1 (4): 506-517.
Datas de Publicação
-
Publicação nesta coleção
04 Jun 2009 -
Data do Fascículo
1999
Histórico
-
Recebido
22 Jan 1999 -
Aceito
16 Nov 1999