Comparison of age composition, growth, and fecundity between two populations each of Fundulus heteroclitus and F. diaphanus (Pisces: Cyprinodontidae)

Abstract

Age composition, growth rate, length–weight relationship, and fecundity comparisons were made among samples of two cyprinodontid fishes, the mummichog (Fundulus heteroclitus) and the banded killifish (F. diaphanus). from brackish water and freshwater sympatric and allopalric populations. Comparisons indicate that growth, both length and weight, of mummichog was not affected by habitation in weakly brackish water, but fecundity was reduced. However, both growth and fecundity of banded killifish were greater in brackish water than in a typical freshwater environment.