Keywords
spawning
fecundity
reproductive strategies
ariidae
How to Cite
Abstract
Marine catfish are abundant in the Sepetiba Bay, a 305 km2 area in Southeast Brazilian coast (Lat. 22o54’-23o04’S; Long. 43o44’-44o10’W), but the knowledge on their biology is still scanty. The reproductive biology of Sciadeichthys luniscutis (Valenciennes 1840) and Genidens genidens (Valenciennes 1839) was studied through monthly sampling, from October 1998 to September 1999. Fishes were caught with a standardized otter trawl, in the interior of Sepetiba Bay, and near to the confluence with a major freshwater contributor. Six gonadal stages were described, based on macroscopic observations of gonad form, size, weight, color and oocyte diameter, and microscopic observations of differences in size and staining in the nucleus and cytoplasm structures, as viewed through a light microscope. Changes in the gonadosomatic index (GSI) and in stages of gonadal development showed what S. luniscutis spawned in Spring, while G. genidens spawned in Summer. Total spawning was shown for both species as indicated by high concentration of post-ovulatory follicles in spent stages. Fecundity was low (14-38 vitellogenic oocytes for S. luniscutis and 6-24 for G. genidens), when compared with other teleosts. Low fecundity and separation in spawning period suggest that both species are k-strategist, able to avoid interspecific competition in early stages of life cycle to optimize the use of the available niche.References
Araújo, F.G, I.D. Gomes, M.C.C. Azevedo & A.L.M. Pessanha. 1998. Maturação e desova do bagre marinho Genidens genidens Valenciennes 1839 (Silururiformes, Ariidae) na Baía de Sepetiba, RJ. Acta Biol. Leopoldensia 20: 109-122.
Araújo, F.G. 1988. Distribuição, abundância relativa en movimentos sazonais de bagres marinhos (Siluriformes, Ariidae) no estuário da Lagoa dos Patos, RS, Brasil. Rev. Bras. Zool. 5: 509-543.
Azevedo, M.C.C., F. G. Araújo, A.G. Cruz-Filho, I.D. Gomes & A.L.M. Pessanha. 1999. Variações espaciais e temporais em bagres marinhos (Siluriformes, Ariidae) na Baía de Sepetiba, RJ. Rev. Bras. Biol. 59: 443-454.
Barbieri, L.R., R.P. Santos & J.V. Andreata. 1992. Reproductive biology of the marine catfish, Genidens genidens (Siluriformes, Ariidae), in the Jacarepagua Lagoon system, Rio de Janeiro, Brazil. Environ. Biol. Fish. 35: 23-35.
Chaves, P.T.C. 1991. Testículos: Estrutura e dinâmica de maturação. In: Chaves, P. T. C. Histologia de peixes – I Semana sobre histologia de peixes da FCAVJUNESP. Jaboticabal, Ed. FUNEP, 47-54 p.
Chaves, P.T.C. 1994. Incubação de ovos e larvas em Genidens genidens (Valenciennes) (Siluriformes, Ariidae) na Baía de Guaratuba, Paraná, Brasil. Rev. Bras. Zool. 11: 641-648.
DeMartini, E.E. & B.B. Lau, 1999. Morphometric criteria for estimating sexual maturity in two snappers, Etelis carbunculus and Pristipomoides sieboldii. Fish. Bull. 97: 449-458.
De Vlaming, V.L. 1972. The effects of temperature and photoperiod on reproductive cycling in the estuarine gobiid fish, Gillichthys mirabilis. Fish. Bull. 73: 1137-52.
Dmitrenko, E.M. 1970. Reproduction of the sea catfish (Arius thalassinus Ruppel) in the Arabian sea. J. Ichthyol. 10: 634-641.
Gomes, I.D., F.G. Araújo, M.C.C. Azevedo & A.L.M. Pessanha. 1999. Biologia reprodutiva do bagre marinho Genidens genidens (Valenciennes) e Cathorops spixii (Agassiz) (Siluriformes, Ariidae) na Baía de Sepetiba, Rio de Janeiro, Brasil. Rev. Bras. Zool. 16: 171-180.
Gunter, G. 1947. Observations on breeding of marine catfish, Galeichthys felis (Linnaeus). Copeia 4: 217- 223.
Hoar, W.S. & D.J. Randall, 1969. Fish Physiology. Reproduction and growth. Bioluminescence,pigments and poisons. New York and London, Academic, Vol. 3: 485 p.
Howell, W.H. 1983. Seasonal changes in the ovaries of adult yellowtail flounder, Limanda ferruginea. Fish. Bull. 81: 341-355.
Hunter, J.R. & B.J. Macewics, 1985. Rates of atresia in the ovary of captive and wild northern anchovy, Engraulis mordax Fish. Bull. 84: 895-903.
Hunter, J.R., B.J. Macewics & J.R. Silbert. 1986. The spawning frequency of skipjack tuna, Katsuwonus pelamis, from the South Pacific. Fish. Bull. 84: 895-903.
Marza, V.D., E.V. Marza & J.M. Guthrie, 1937. Histochemistry of the ovary of Fundulus heteroclitus with special reference to the differentiating oocytes. Biological Bulletin Marine Biological Laboratory, Woods Hole 73: 67-72.
Mazzoni, R., J. Petito & J.C. Miranda. 2000. Reproductive biology of Genidens genidens an catfish from the Maricá lagoon, RJ. Ciência e Cultura. 52: 121 –126.
Mishima, M. & S. Tanji. 1983. Maturação e desova de bagres marinhos (Osteichthyes, Ariidae) na área estuarina de Cananéia (25ºS, 48ºW), SP. Boletim Instituto de Pesca 10: 129-141.
Narahara, M.Y., M.A. Basile-Martins, H.M. Godinho & M. N. Cipóli. 1988. Escala de maturidade, período
de desova e influências de parâmetros ambientais no desenvolvimento gonadal de Rhamdia hilarii (Valenciennes, 1840). Boletim Instituto de Pesca 15: 201-211.
Narahara, M.Y. 1991. Histofisiologia de ovários de teleósteos. In: Chaves, P. T. C. Histology of fishes – I Semana sobre histologia de peixes da FCAVJUNESP. Jaboticabal, Ed. FUNEP, 39-46 p.
Reis, E.G. 1986. Reprodução e hábitos alimentares do bagre marinho Netuma barba (Siluriformes, Ariidae), no estuário da Lagoa dos Patos, RS. Atlântica 8: 35-55.
Rimmer, M.A. & J.R. Merrick. 1983. A review of reproduction and development in the fork-tailed catfishes (Ariidae). Proc. Limnol. Soc. 107: 41-50.
Selman, K., R.A. Wallace & V. Barr. 1988. Oogenesis in Fundulus heteroclitus. V. The relationship of yolk vesicles and cortical alveoli. J. Exp. Zool. 246: 42-56.
Vazzoler, A.M.A. de M. 1981. Manual e métodos de estudos biológicos de população de peixes. Reprodução e crescimento. Brasília, CNPq/Programa Nacional de Zoologia: 51 p.
Vazzoler, A.M.A. de M. 1996. Biologia reprodutiva de peixes teleósteos: Teoria e prática. Maringá, Editora Universidade Estadual de Maringá e Sociedade Brasileira de Ictiologia, Brasília, CNPq/Programa Nacional de Zoologia: 169 p.
Wallace, R. A. & K. Selman. 1981. Cellular and dynamic aspects of oocyte growth in teleosts. Am. Zool. 21: 325-343.
West, G. 1990. Methods of assessing ovarian development in fishes: a review. Australian Journal Marine and Freshwater Res. 41: 199-222.
Yañez-Arancibia, A., J. Curiel-Gomez & V.L. Yañez. 1976. A biological and ecological account of the
marine catfish Galeichthys cearulenscens (Gunter) in the Guerrero coastal lagoon system, Mexico (Pisces, Ariidae). Annais Centro del Mar y Limnology Universidad Nacional Autonoma Mexico 3: 125-138.
Yañez-Arancibia, A. & P. Sanchez-Gil. 1988. Ecology of demersal marine resources. Mexico, AGT. 228 p
Comments
This work is licensed under a Creative Commons Attribution 4.0 International License.
Copyright (c) 2004 Revista de Biología Tropical