title: Comparative Study of Reproductive Development in Wild and Captive-Reared Greater Amberjack Seriola dumerili (Risso, 1810).
abstract: The greater amberjack Seriola dumerili is a large teleost fish with rapid growth and excellent flesh quality, whose domestication represents an ambitious challenge for aquaculture. The occurrence of reproductive dysfunctions in greater amberjack reared in captivity was investigated by comparing reproductive development of wild and captive-reared individuals. Wild and captive-reared breeders were sampled in the Mediterranean Sea during three different phases of the reproductive cycle: early gametogenesis (EARLY, late April-early May), advanced gametogenesis (ADVANCED, late May-early June) and spawning (SPAWNING, late June-July). Fish reproductive state was evaluated using the gonado-somatic index (GSI), histological analysis of the gonads and determination of sex steroid levels in the plasma, and correlated with leptin expression in the liver and gonad biochemical composition. The GSI and sex steroid levels were lower in captive-reared than in wild fish. During the ADVANCED period, when the wild greater amberjack breeders were already in spawning condition, ovaries of captive-reared breeders showed extensive atresia of late vitellogenic oocytes and spermatogenic activity ceased in the testes of half of the examined males. During the SPAWNING period, all captive-reared fish had regressed gonads, while wild breeders still displayed reproductive activity. Liver leptin expression and gonad proximate composition of wild and captive greater amberjack were similar. However, the gonads of captive-reared fish showed different total polar lipid contents, as well as specific lipid classes and fatty acid profiles with respect to wild individuals. This study underlines the need for an improvement in rearing technology for this species, which should include minimum handling during the reproductive season and the formulation of a specific diet to overcome the observed gonadal decrements of phospholipids, DHA (22:6n-3) and ARA (20:4n-6), compared to wild breeders.
authors.affiliation: Department of Emergency and Organ Transplantation, Section of Veterinary Clinics and Animal Production, University of Bari Aldo Moro, Valenzano (Bari), Italy.
authors.forename: Rosa
authors.initials: R
authors.lastname: Zupa
authors.affiliation: Departamento de Biología Animal, Edafología y Geología, Facultad de Ciencias, Universidad de La Laguna, La Laguna, Tenerife, Spain.
authors.forename: Covadonga
authors.initials: C
authors.lastname: Rodríguez
authors.affiliation: Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Center for Marine Research, Heraklion, Crete, Greece.
authors.forename: Constantinos C
authors.initials: CC
authors.lastname: Mylonas
authors.affiliation: National Center for Mariculture, Israel Oceanographic and Limnological Research, Eilat, Israel.
authors.forename: Hanna
authors.initials: H
authors.lastname: Rosenfeld
authors.affiliation: Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Center for Marine Research, Heraklion, Crete, Greece.
authors.forename: Ioannis
authors.initials: I
authors.lastname: Fakriadis
authors.affiliation: Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Center for Marine Research, Heraklion, Crete, Greece.
authors.forename: Maria
authors.initials: M
authors.lastname: Papadaki
authors.affiliation: Departamento de Biología Animal, Edafología y Geología, Facultad de Ciencias, Universidad de La Laguna, La Laguna, Tenerife, Spain.
authors.forename: José A
authors.initials: JA
authors.lastname: Pérez
authors.affiliation: Department of Emergency and Organ Transplantation, Section of Veterinary Clinics and Animal Production, University of Bari Aldo Moro, Valenzano (Bari), Italy.
authors.forename: Chrysovalentinos
authors.initials: C
authors.lastname: Pousis
authors.affiliation: Institute for Marine Coastal Environment, National Research Council, Capo Granitola (TP), Italy.
authors.forename: Gualtiero
authors.initials: G
authors.lastname: Basilone
authors.affiliation: Department of Emergency and Organ Transplantation, Section of Veterinary Clinics and Animal Production, University of Bari Aldo Moro, Valenzano (Bari), Italy.
authors.forename: Aldo
authors.identifier: http://orcid.org/0000-0001-7068-9438
authors.initials: A
authors.lastname: Corriero
mesh_terms: D000818:Animals; D001699:Biometry; D004797:Enzyme-Linked Immunosorbent Assay; D005227:Fatty Acids / Q000378:metabolism; D005260:Female; D006066:Gonads / Q000378:metabolism; D006908:Hydroxyprogesterones / Q000097:blood; D020738:Leptin / Q000235:genetics; D008297:Male; D008522:Mediterranean Sea; D010053:Ovary / Q000378:metabolism; D010473:Perciformes / Q000378:metabolism* / Q000502:physiology*; D060888:Real-Time Polymerase Chain Reaction; D012098:Reproduction / Q000502:physiology*; D013696:Temperature; D013737:Testis / Q000378:metabolism; D013739:Testosterone / Q000031:analogs & derivatives / Q000097:blood
chemical_list: D005227:Fatty Acids; D006908:Hydroxyprogesterones; D020738:Leptin; C007433:17,20-dihydroxy-4-pregnen-3-one; D013739:Testosterone; C003600:11-ketotestosterone