Oogenesis of paliya Salvelinus alpinus complex (Salmonidae) during its breeding under fish-farm conditions


Citar

Texto integral

Acesso aberto Acesso aberto
Acesso é fechado Acesso está concedido
Acesso é fechado Somente assinantes

Resumo

A histological study of oogenesis of paliya Salvelinus alpinus complex (from larvae aged 3 weeks after hatching to the age of 3 years and 9 months) has been carried out. The fish was bred in tanks of the Federal Center of Fish Genetics and Selection (FCFGS, Ropsha, Leningrad oblast). Three-week-old larvae had primordial cells and gonia of the first orders in rudimentary gonads. Sex differentiation was completed and development of ovarian plates started in young fish aged 3.5 months. There were already previtellogenic oocytes in fish ovaries at this age. The morphology of the circumnuclear zone in previtellogenic oocytes of all stages, which appear as the age of the fish increases, as well as the morphology of oocytes of the period of trophoplasmatic growth, are described. In FCFGS conditions, paliya females aged 3 years and 9 months did not mature or oocytes degenerated in mature females. Only after a year, normal spawn was obtained from mature females.

Sobre autores

Yu. Kuznetsov

St. Petersburg State University

Email: MMosyagina@rambler.ru
Rússia, Universitetskaya nab. 7/9, St. Petersburg, 199034

M. Mosyagina

St. Petersburg State Academy of Veterinary Medicine

Autor responsável pela correspondência
Email: MMosyagina@rambler.ru
Rússia, ul. Chernigovskaya 5, St. Petersburg, 196084

Arquivos suplementares

Arquivos suplementares
Ação
1. JATS XML

Declaração de direitos autorais © Pleiades Publishing, Ltd., 2016