Gametogenic cycle of Mesodesma donacium in Longotoma, 1995, La Ligua Bay, Chile

Gonad stage: Number of male or female clams in each of the following gonad stages: early mature; advanced maturity; mature; early regresion; final regresion. Classification was...性腺发育期（gonad stage）：处于下述各性腺发育期的雄性或雌性蛤蜊的数量：早期成熟、成熟后期、完全成熟、早期退化、最终退化。分类方法为……