A incubação de ovos e larvas em Genidens genidens (Valenciennes) (Siluriformes, Ariidae) da Baía de Guaratuba, Paraná, BrasilResumo
At Guaraluba bay, the catfish Genidens genidens shows incubating behavior during the summer months. The larvae are either less or heavier than the eggs, and their stomach analysis confirms the exogenous leeding during incubation. Embryos sizes can increase to 59mm in total lenght and 2,8g in total weight, including the yolksac. It was observed that the largest larvae are guarded by the largest adults, and that the embryo size is similar among individuals from the same adult.
Catfish; reproduction; fishes; larvae; Paraná
Catfish; reproduction; fishes; larvae; Paraná
A incubação de ovos e larvas em Genidens genidens (Valenciennes) (Siluriformes, Ariidae) da Baía de Guaratuba, Paraná, Brasil1
Eggs and larvae mouthbreeding in Genidens genidens (Valenciennes) (Siluriformes, Ariidae) from Guaratuba Bay, Paraná, Brazil
Paulo de Tarso da C. Chaves
Departamento de Zoologia, Universidade Federal do Paraná, Caixa Postal 19020, 81531-970 Curitiba, Paraná, Brasil, Pesquisador do CNPq
ABSTRACT
At Guaraluba bay, the catfish Genidens genidens shows incubating behavior during the summer months. The larvae are either less or heavier than the eggs, and their stomach analysis confirms the exogenous leeding during incubation. Embryos sizes can increase to 59mm in total lenght and 2,8g in total weight, including the yolksac. It was observed that the largest larvae are guarded by the largest adults, and that the embryo size is similar among individuals from the same adult.
Key words: Catfish, reproduction, fishes, larvae, Paraná
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AGRADECIMENTOS. Ao Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) e à Fundação da Universidade Federal do Paraná, pela concessão de auxílios. Ainda ao acadêmico Dalton T.R. dos Santos, pela arte final das ilustrações, e a dois Revisores anônimos.
Recebido em 10.V.1994; aceito em 08.VIII.1994.
Referências bibliográficas
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- Coates, D. 1988. Length-dependent changes in egg size fecundity in females, and brooded embryo size in males, of fork-tailed catfishes (Pisces: Ariidae) from the Sepik River, Papua New Guinea, with some implications for stock assessments. J. Fish Biol. 33: 455-464.
- Etchevers, S.L. 1978. Contribution to the biology of the sea catfish, Arius spixii (Agassiz) (Pisces, Ariidae), south of Margarita Island, Venezuela. Bull. mar. Sci.28 (2): 381-385.
- Gunter, G. 1947. Observation on breeding of the marine catfish, Galeichthys felis (Linnaeus). Copeia 4: 217-223.
- Mishima, M. & S. Tanji. 1985. Fecundidade e incubação dos bagres marinhos (Osteichthyes, Ariidae) do complexo estuarino lagunar de Cananéia (25ºS, 48ºW). Bolm Inst. Pesca, São Paulo, 12 (2): 77-85.
- Oppenheimer. J.R. 1970. Mouthbreeding in fishes. Anim. Behav. 18: 493-503.
- Peda, J.C; R.M. Sanchez & M.M. Jamett. 1988. Desarrollo embrionário. larval y del alevín de Cichlasoma dovii (Gunther, 1864) (Pisces: Cichlidae). Revta Biol. trop. 36 (2B): 417-422.
- Reis, E.G. 1986. Reproduction and feeding habits of the marine catfish Netuma barba (Siluriformes, Ariidae) in the estuary of Lagoa dos Patos, Brazil. Atlântica, Rio Grande, 8: 35-55.
Datas de Publicação
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Publicação nesta coleção
22 Jul 2009 -
Data do Fascículo
1994
Histórico
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Aceito
08 Ago 1994 -
Recebido
10 Maio 1994
