... at extremely high levels. These attributes are related to reproduction in ways that have not been fully characterized. In the present study, we have demonstrated that female-specific zinc and MT accumulation and distribution are strongly correlated to the onset of sexual maturity in Holocentrus adsenscionis...

... trout or in any other vertebrate species, male or female, so far as we can tell. Cardiac performance of mature males was nearly twice that of females and immature males. We believe that the high levels of circulating steroids present in male trout during sexual maturation stimulate heart growth...