Reproductive seasonality in teleosts: environmental influences

Many, if not all, environments are seasonal, and this is reflected in adaptive cyclic changes in the biology of their associated fauna and flora. This is as true for teleost fish as for other organisms, with evidence that reproduction, like other aspects of their life history, tends to be seasonal in many environments. This report considers: 1) some of the factors which favor reproductive seasonality in teleosts, and 2) key concepts relating to how an organism may anticipate seasonal changes. It also focuses on specific groups of teleosts, identified either by their taxonomy or their ecology.