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.
Median circulating melatonin concentrations (pg/ml) of 22 day-old crickets, measured from haemolymph samples taken during the light period for LD (dark grey) and LL (light grey) crickets (LD N = 20; LL N = 10). Error bars indicate interquartile ranges about the median; different letters indicate significant differences between groups (P < 0.05).
