title: Photoperiodic activity changes in juvenile sockeye salmon (Oncorhynchus nerka).
mesh_terms: D000222:Adaptation, Physiological; D000818:Animals; D000831:Animals, Newborn; D001522:Behavior, Animal; D003623:Dark Adaptation; D008027:Light; D012474:Salmon / Q000502:physiology*; D013550:Swimming