Previous studies have also found that large
female pipefish, which are able to transfer more eggs to the male's pouch, are more attractive to the males.
In these cases, females must compete for access to available mates, and indeed, researchers have found secondary sex traits, such as brightly colored ornamentation, evolving in
female pipefish instead of males.
Not exact matches
The father
pipefish might do this by transferring more nutrients to broods mothered by attractive
females and allowing less desirable broods to languish.