Demographic data are essential to determine the probability that species will persist over time. Unfortunately, demographic studies are rarely part of the initial evaluation of potentially threatened or endangered species. ...

Superfetation, the ability of females to simultaneously carry more than one brood at different developmental stages, is an unusual reproductive strategy that has independently evolved several times in the livebearing fish ...

Identifying differences in mortality rates in wild fish populations can provide insight into ecological and evolutionary variation within species, including differences between sexes. In this study, we examined natural ...