5种养殖鲟鱼怀卵差异及周年繁殖

2007年11月至2009年11月通过对12批次(共计5 207尾个体)解剖观察,统计了5种性成熟鲟鱼西伯利亚鲟(Acipenser baeri)、俄罗斯鲟(A.gueldenstaedti)、施氏鲟(A.schrencki)、黑龙江杂交鲟(Huso dauricus ♀×A.schrencki ♂)和欧洲杂交鲟(H...

Fecundity and Year-Round Artificial Reproduction in Five Species of Sturgeons

Gonadal development of Siberian Sturgeon(Acipenser baeri),Russian Sturgeon(A.gueldenstaedti),Amur sturgeon(A.schrencki),Heilongjiang Hybrid Sturgeon(Huso dauricus ♀ × A.schrencki ♂) and Europe Hybrid Sturgeon(H.huso ♀ × A.ruthenus ♂) from 12 test groups was observed during November 2007 to November 2009.Their gonads could develop to stage Ⅳduring different seasons,with egg diameter reaching or exceeding 2.8 mm.In February 2009,5 Siberian Sturgeons and 13 Russian Sturgeons were randomly selected for artificial reproduction,and all were induced to ovulate successfully except one Russian Sturgeon individual,suggesting that sturgeons can be artificially propagated at any seasons throughout a year.Their fecundity had seasonal fluctuations.It was showed that Amur sturgeon,Siberian Sturgeon,Russian Sturgeon and Heilongjiang Hybrid Sturgeon’s fecundity was negatively correlated with their body weight,with correlation coefficients at-0.021(P<0.01),-0.159(P<0.01),-0.145(P<0.01) and-0.062(P<0.01),respectively.Fecundity of the European Hybrid Sturgeon was positively related with body weight and the correlation coefficient was 0.051(P<0.01).Otherwise,curve fitting of body weight and egg weight showed that the body weight and egg weight were positively correlated in several species of sturgeon.Our results indicate that artificial breeding of all these 5 species of sturgeon is feasible all year round.