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Lipid and fatty acid dynamics by maternal Pacific bluefin tuna

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Title: Lipid and fatty acid dynamics by maternal Pacific bluefin tuna
Authors: Hiraoka, Yuko Browse this author
Okochi, Yumi Browse this author
Ohshimo, Seiji Browse this author
Shimose, Tamaki Browse this author →KAKEN DB
Ashida, Hiroshi Browse this author →KAKEN DB
Sato, Takuya Browse this author
Ando, Yasuhiro Browse this author →KAKEN DB
Issue Date: 25-Sep-2019
Publisher: PLOS
Journal Title: PLoS ONE
Volume: 14
Issue: 9
Start Page: e0222824
Publisher DOI: 10.1371/journal.pone.0222824
Abstract: Lipid and fatty acid composition of female Pacific bluefin tuna (PBF, Thunnus orientalis) reproductive and somatic tissues in southwestern North Pacific and Sea of Japan spawning grounds are compared. Total lipid (TL) levels are higher in liver than white muscle tissues. An increased gonadosomatic index (GSI) during the early spawning season coincided with decreased TL. Levels of triacylglycerols (TAG) in PBF liver tissues from the Nansei Islands and Sea of Japan, and white muscle in fishes from the Sea of Japan, decreased during the spawning season, while TAG in ovary tissues did not. Concurrent reductions in TL and increases in GSI early in the spawning season suggest TAG depletion was caused by allocation from liver and white muscle tissues to oocytes, that the liver is one of the important lipid-storage organs in PBF, and this species mostly reliant on capital deposits as a mixed capital-income breeder. Differences of docosahexaenoic acid (DHA) levels between spawning grounds were lower in ovary than in muscle and liver tissues. However, eicosapentaenoic (EPA) and arachidonic acid (ARA) levels that influence egg development and embryo and larval growth are significantly higher in PBF tissues from the Sea of Japan than Nansei Islands, which coincided with larval quality. These suggest a maternal effect exists, with egg quality influencing offspring survival, and that the reproductive strategy of PBF varies according to local variation at each spawning ground.
Type: article
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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