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.
Melatonin content in the eyestalks of the crab Neohelice granulata in vitro. The eyestalks were incubated for 45 min at 0.7, 2, 4 or 6 mgO2·L−1. Each point represents the mean ± standard error (SE) (n = 5). * represents a significant difference (p < 0.05) from the other groups.
