Normal female vitellogenesis and increase in male germ cell apoptosis in captive reared Bluefin tuna Thunnus thynnus (L..).

The study of bluefin tuna Thunnus thynnus (L.) gametogenesis is necessary in order to support a self-sustained aquaculture industry for this species that would help reduce the fishing pressure with positive effects on wild populations. In the present study, the effects of rearing in captivity on bluefin tuna vitellogenesis and male germ cell apoptosis are reported. Liver and gonad samples were taken from 30 bluefin tuna reared in captivity in floating cages in Cartagena (Spain), Malta and Vibo Marina (Italy). For comparison, liver and gonad samples from 33 wild individuals, captured in two traps operating in Sardinia (Italy) and Morocco and by a longliner in Malta, were used.