title: Seasonal rhythm of red pigment concentrating hormone in the crayfish.
abstract: The content of red pigment concentrating hormone (RPCH) in the eye-stalk of the crayfish Procambarus clarkii varies seasonally, with maximum values during the summer months and the lowest values in winter. The responsiveness of tegumentary chromatophores to synthetic RPCH varies concurrently.
authors.affiliation: División de Estudios de Posgrado e Investigación, Facultad de Medicina, UNAM, México, D.F.
authors.forename: L
authors.initials: L
authors.lastname: Rodríguez-Sosa
authors.forename: M T
authors.initials: MT
authors.lastname: de la Vega
authors.forename: P
authors.initials: P
authors.lastname: Vergara
authors.forename: H
authors.initials: H
authors.lastname: Aréchiga
mesh_terms: D000818:Animals; D003400:Astacoidea / Q000378:metabolism*; D005123:Eye / Q000187:drug effects / Q000378:metabolism; D005136:Eye Proteins / Q000096:biosynthesis; D005260:Female; D007447:Invertebrate Hormones / Q000378:metabolism* / Q000494:pharmacology; D008297:Male; D009842:Oligopeptides / Q000378:metabolism* / Q000494:pharmacology; D010507:Periodicity; D011761:Pyrrolidonecarboxylic Acid / Q000031:analogs & derivatives; D012168:Retinal Pigments / Q000096:biosynthesis; D017299:Rod Opsins; D012621:Seasons
chemical_list: D005136:Eye Proteins; D007447:Invertebrate Hormones; D009842:Oligopeptides; D012168:Retinal Pigments; D017299:Rod Opsins; C095855:long-wavelength opsin; C022059:red pigment-concentrating hormone; D011761:Pyrrolidonecarboxylic Acid