title: Influence of temperature regime on endocrine parameters and vitellogenesis during experimental maturation of European eel (Anguilla anguilla) females.
abstract: We examined the effect of temperature in European silver eels during their maturation induced by injections of carp pituitary extract on endocrine parameters: pituitary fshβ and lhβ expression, plasma 17β-estradiol (E2) and vitellogenin, estrogen receptor 1 (esr1), and vitellogenin 2 (vtg2) expression in liver. A variable thermal regime (T10) that increased from 10° to 14° and 17°C was compared with a constant 20°C regime (T20) during 12 weeks. T10 caused a faster development until week 8, higher fshβ, lhβ, esr1 expression, and higher E2 levels. The results strongly suggest that T10 is inducing a higher endogenous FSH level which increases the E2 circulating level during vitellogenesis. A variable thermal regime induced an fshβ expression and E2 profile in vitellogenic hormonally matured eel females that were more similar to the profile observed in other naturally maturing fish.
authors.affiliation: Grupo de Acuicultura y Biodiversidad, Instituto de Ciencia y Tecnología Animal, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain. mlpereig@dca.upv.es
authors.forename: L
authors.initials: L
authors.lastname: Pérez
authors.forename: D S
authors.initials: DS
authors.lastname: Peñaranda
authors.forename: S
authors.initials: S
authors.lastname: Dufour
authors.forename: S
authors.initials: S
authors.lastname: Baloche
authors.forename: A P
authors.initials: AP
authors.lastname: Palstra
authors.forename: G E E J M
authors.initials: GE
authors.lastname: Van Den Thillart
authors.forename: J F
authors.initials: JF
authors.lastname: Asturiano
mesh_terms: D000811:Anguilla / Q000097:blood* / Q000378:metabolism; D000818:Animals; D002347:Carps / Q000378:metabolism; D004703:Endocrine System / Q000187:drug effects / Q000378:metabolism* / Q000502:physiology; D004958:Estradiol / Q000097:blood; D005260:Female; D037201:Follicle Stimulating Hormone, beta Subunit / Q000097:blood; D010902:Pituitary Gland / Q000737:chemistry; D013696:Temperature; D014020:Tissue Extracts / Q000494:pharmacology; D014818:Vitellogenesis / Q000187:drug effects* / Q000502:physiology*; D014819:Vitellogenins / Q000097:blood
chemical_list: D037201:Follicle Stimulating Hormone, beta Subunit; D014020:Tissue Extracts; D014819:Vitellogenins; D004958:Estradiol