Ovary development in Greenland halibut Reinhardtius hippoglossoides in west Greenland waters

摘要: Maturity in adult female Greenland halibut Reinhardtius hippoglossoides was studied three areas west waters: the inshore area Disko Bay and two offshore areas, Baffin Davis Strait. The aim to monitor maturity changes fjords of over an extended period from winter autumn compare these findings with specimens presumed spawning A significant difference level observed between areas. In indices increased significantly August September both respect gonado-somatic index (I G ) size leading oocyte cohort. February May no were observed. Mature ovaries only among fish >80 cm total length a fraction large fish. Offshore Bay, even though poorly sampled, showed similar signs as Bay. Relative Strait had more progressed indices. Furthermore, almost all contrary proportion apparently did not begin maturation cycle until very late their life history or repeat spawners multi-year cycle. These observations could thus support hypothesis that have prolonged adolescent phase. Atresia highest early phases but relatively high levels atresia also advanced first ascribed fecundity regulation while latter be linked fish's fitness condition it possible show this available index.