Serotonin content in the pineal gland of the antarctic penguin (Pygoscelis papua).
D000818:Animals; D000864:Antarctic Regions; D001717:Birds; D002940:Circadian Rhythm; D010775:Photic Stimulation; D010870:Pineal Gland / Q000032:analysis*; D012621:Seasons; D012701:Serotonin / Q000032:analysis*
D012701:Serotonin