The reproductive cycle of male catfish Pseudoplatystoma fasciatum (Teleostei, Pimelodidae) revealed by changes of the germinal epithelium

The aims of the present study were to analyze the gonadal structure of Pseudoplatystoma fasciatum males during their annual cycle to enhance understanding of their reproductive biology and to improve the hormonally induced reproduction and culture of this species in hatcheries. We adopted the recent...

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Bibliographic Details
Published in:Animal reproduction science 2006-11, Vol.96 (1), p.116-132
Main Authors: Batlouni, S.R., Romagosa, E., Borella, M.I.
Format: Article
Language:English
Subjects:
Germinal epithelium
Pseudoplatystoma fasciatum
Reproductive cycle
Siluriformes
Spermatogenesis
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Summary:The aims of the present study were to analyze the gonadal structure of Pseudoplatystoma fasciatum males during their annual cycle to enhance understanding of their reproductive biology and to improve the hormonally induced reproduction and culture of this species in hatcheries. We adopted the recently proposed method that establishes reproductive classes that are based on variations of the germinal epithelium within the year. Five reproductive classes were established: maturation (early, middle, and late), regression and recrudescence. Our observations revealed that in the spawning season P. fasciatum testes display two main functions: sperm production and sperm storage. We also concluded that the analysis of the variation of germinal epithelium was satisfactory when applied to this freshwater catfish and should be adopted for other fish species.
ISSN:0378-4320
1873-2232
DOI:10.1016/j.anireprosci.2005.11.012