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dc.contributor.authorGrande, Maitane-
dc.contributor.authorMurua, H.-
dc.contributor.authorZudaire, Iker-
dc.contributor.authorArsenault-Pernet, E. J.-
dc.contributor.authorBodin, N.-
dc.contributor.authorPernet, F.-
dc.date.accessioned2017-08-23T08:52:01Z-
dc.date.available2017-08-23T08:52:01Z-
dc.date.issued2016-
dc.identifierISI:000387102300013-
dc.identifier.citationJOURNAL OF FISH BIOLOGY, 2016, 89, 2434-2448-
dc.identifier.issn0022-1112-
dc.identifier.urihttp://dspace.azti.es/handle/24689/115-
dc.description.abstractThe lipid composition of somatic and reproductive tissues was determined for female skipjack tuna Katsuwonus pelamis caught in the western Indian Ocean between latitude 10 degrees N and 20 degrees S and longitude 40 degrees and 70 degrees E. The highest total lipid (TL) contents were in the liver and gonads, with white muscle levels approximately three-fold lower. Three lipid classes dominated: triacylglycerols (TAG), sterol esters and wax esters (SE-WE) and phospholipids (PL). Collectively, these accounted for between 70 and 80\% of TLs. Changes in lipid concentrations were evaluated over the maturation cycle. Immature fish had the lowest gonad and liver TL levels; concentrations of TL, TAG, SE-WE and PL accumulated from immature to mature (spawning-capable) phase, reflecting sustained vitellogenic activity of the liver and a transfer of lipids to developing oocytes from the onset of vitellogenesis. Gonado-somatic and hepato-somatic indices were positively correlated with each other and positively related to TL in the gonads and liver. Fulton's condition index and lipid concentrations in muscle did not vary significantly over the maturation cycle; fat content in the main storage tissues was undepleted as the ovary developed. Hence, K. pelamis apparently supports reproduction directly from food intake over the breeding season. In the gonads, reserve lipids (SE-WE and TAG) and sterols were related to batch fecundity but this was not the case for somatic and hepatic tissues. These results suggest that K. pelamis utilizes an income breeding strategy.-
dc.description.sponsorshipThe authors are grateful to X. Salaberria for help with the laboratory work. They also thank I. Gomez, M. Cuesta and I. Martin for help in planning the sampling regime and J. Murua, G. Ocio and A. Sanchez for help conducting sampling in the Indian Ocean. The paper benefited from review comments by J. Alpine. This work is part of the PhD research of M. Grande. This research benefited from the financial support of the Fundacion Centros Tecnologicos, the Department of Agriculture, Fisheries and Food of the Basque Government, the Pesqueria Vasco Montanesa (PEVASA) fishing company and the French National Research Agency through the EMOTION project (ANR JSV7 00701). The experiments complied with the current laws of the countries in which they were performed. The authors declare that they have no conflicts of interest. This paper is contribution no. 775 from AZTI-Tecnalia (Marine Research Division).-
dc.language.isoeng-
dc.publisherWILEY-BLACKWELL-
dc.subjectIncome breeder-
dc.subjectIndian Ocean-
dc.subjectlipid classes-
dc.subjectreproduction-
dc.subjecttropical tuna-
dc.subjectWESTERN INDIAN-OCEAN-
dc.subjectFATTY-ACID-COMPOSITION-
dc.subjectCOD GADUS-MORHUA-
dc.subjectBONITO EUTHYNNUS-PELAMIS-
dc.subjectHIGHLY MIGRATORY FISH-
dc.subjectTHUNNUS-ALBACARES-
dc.subjectTELEOST FISH-
dc.subjectOOCYTE GROWTH-
dc.subjectTROPICAL TUNA-
dc.subjectSARDA-SARDA-
dc.titleEnergy allocation strategy of skipjack tuna Katsuwonus pelamis during their reproductive cycle-
dc.typeArticle-
dc.identifier.journalJOURNAL OF FISH BIOLOGY-
dc.format.page2434-2448-
dc.format.volume89-
dc.contributor.funderFundacion Centros Tecnologicos-
dc.contributor.funderDepartment of Agriculture, Fisheries and Food of the Basque Government-
dc.contributor.funderPesqueria Vasco Montanesa (PEVASA) fishing company-
dc.contributor.funderFrench National Research Agency through the EMOTION project \[ANR JSV7 00701]-
dc.identifier.e-issn1095-8649-
dc.identifier.doi10.1111/jfb.13125-
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