Gametogenic cycle of Mesodesma donacium in Mehuin beach, 1991, Valdivia, Chile

Gonad stage: Percentage (from a montly sample of 30 clams) of male and female clams classified into four gonad stages: inmature, mature, late maturity, spawned, regression....

性腺分期（Gonad stage）数据集：该数据为占比数值，样本来自每月采集的30只蛤蜊，涵盖被划分为4个性腺分期的雄性与雌性蛤蜊，分期类型包含未成熟（inmature）、成熟、成熟晚期、产卵后（spawned）、退化（regression）……