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Revista Brasileira de Zoologia

Print version ISSN 0101-8175

Abstract

CHAVES, Paulo de Tarso da C. Eggs and larvae mouthbreeding in Genidens genidens (Valenciennes) (Siluriformes, Ariidae) from Guaratuba Bay, Paraná, Brazil. Rev. Bras. Zool. [online]. 1994, vol.11, n.4, pp. 641-648. ISSN 0101-8175.  http://dx.doi.org/10.1590/S0101-81751994000400008.

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.

Keywords : Catfish; reproduction; fishes; larvae; Paraná.

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