Hystological analysis of ovarian development of the characiform Oligosarcus hepsetus (Cuvier, 1829) in a Brazilizn Reservoir

Brazilian Journal of Biology

R. N Santos¹  C. C Andrade¹  A. F. G. N Santos¹  L. N. Santos¹  F. G. Araújo¹ 

[1] ,Universidade Federal Rural do Rio de Janeiro Laboratório de Ecologia de Peixes Seropédica RJ ,Brazil

关键词: reproductive strategy;    spawns;    Characiforms;    reservoirs;    Brazil;    estratégia reprodutiva;    desova;    Characiformes;    reservatório;    Brazil;   

DOI  :  10.1590/S1519-69842005000100020

来源: SciELO

【 摘 要 】

A histological analysis was performed of the ovarian development of Oligosarcus hepsetus (Cuvier, 1829), a medium-sized carnivorous Characiform species in the Lajes reservoir, Brazil. A total of 125 fishes, collected monthly between April 2001 and June 2002 were examined by routine macroscopic and histological techniques. Eight phases of the oocyte development were described, and 4 stages and 4 sub-stages of gonadal development were proposed. Spawning in reservoirs, similarly to that in rivers, is in batches, which favors juvenile survival and suggests that the impoundment of this area did not influence the reproductive strategy of this very successful species in a dammed environment.

【 授权许可】

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