Data for: Superfetation increases total fecundity in a viviparous fish regardless of the particular environmental context

Data on superfetation, water velocity, population density, and adult mortality of the livebearing fish Poeciliopsis baenschi (Poeciliidae).本数据集涵盖胎生鱼类班氏花鳉（Poeciliopsis baenschi，花鳉科Poeciliidae）的超胎生（superfetation）、水流速度、种群密度及成体死亡率相关数据。