Field study suggests that sex determination in sea lamprey is directly influenced by larval growth rate.

ABSTRACT: Sex determination mechanisms in fishes lie along a genetic-environmental continuum and thereby offer opportunities to understand how physiology and environment interact to determine sex. Mechanisms and ecological consequences of sex determination in fishes are primarily garnered from teleosts, with little investigation into basal fishes. We tagged and released larval sea lamprey (Petromyzon marinus) into unproductive lake and productive stream environments. Sex ratios produced from these environments were quantified by recapturing tagged individuals as adults. Sex ratios from unproductive and productive environments were initially similar. However, sex ratios soon diverged, with unproductive environments becoming increasingly male-skewed and productive environments becoming less male-skewe

SUBMITTER: Johnson NS 

PROVIDER: S-EPMC5378093 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature