Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a,b) The frequency with which the male with the larger trait value was preferred (absolute preference) for (a) male size, (b) nest cover. (c,d) Yearly distributions of fish size for (c) males, (d) females. Open symbols indicate values averaged out across all four years.
