title: The causal factors and function of 'yawning' in Microspathodon chrysurus (Pisces: Pomacentridae).
mesh_terms: D000324:Adrenocorticotropic Hormone / Q000494:pharmacology; D000818:Animals; D002940:Circadian Rhythm; D005399:Fishes / Q000502:physiology*; D005639:Frustration; D009043:Motor Activity; D012018:Reflex / Q000187:drug effects; D012119:Respiration; D014785:Vision, Ocular
chemical_list: D000324:Adrenocorticotropic Hormone