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Maternal age influences on reproductive rates in Nile tilapia (Oreochromis niloticus)
(Revista Brasileira De Zootecnia-brazilian Journal Of Animal Science, 2015-04-01) [Artigo]
In this study we examined the effects of the maternal age on the fecundity (absolute and relative), egg production, and fertilization rates of Nile tilapia (Oreochromis niloticus). Females were divided into three groups: ...
Spermatozoon ultrastructure and semen parameters of Brycon vermelha (Characiformes, Characidae)
(Animal Reproduction Science, 2015-06-01) [Artigo]
This study analyzed semen parameters and the ultrastructure of spermatozoa of Brycon vermelha. The semen was white and viscous, with a mean volume of 5.0 +/- 2.6 mL/kg body weight and mean spermatozoon concentration of 4.3 ...