When size matters: The gonads of larger female yellowfin tuna (Thunnus albacares) have different fatty acid profiles compared to smaller individuals

Type Article
Date 2020-12
Language English
Author(s) Pecoraro C.1, Zudaire I.2, Galimberti G.3, Romeo M.4, Murua H.5, Fruciano C.6, Scherer C.7, Tinti F.8, Diaha N.C.9, Bodin Nathalie10, 11, Chassot Emmanuel10, 11
Affiliation(s) 1 : Physalia-courses, Berlin, Germany
2 : Azti tecnalia, Herrera Kaia, Portualdea z/g, Pasaia Gipuzkoa 20110, Spain
3 : Università di Bologna, Dipartimento di Scienze Statistiche "Paolo Fortunati", Via Belle Arti 41, Bologna, Italy
4 : Oman Aquarium, Muscat, Oman
5 : International Seafood Sustainability Foundation (ISSF), 1440 G Street NW, Washington, DC 20005, United States
6 : Institut de Biologie de l’Ecole Normale Supérieure (IBENS), Ecole Normale Supérieure, CNRS, PSL Université Paris, 75005 Paris, France
7 : Leibniz Instiute for Zoo and Wildlife Research (IZW), Alfred-Kowalke-Str. 17, DE-10315 Berlin, Germany
8 : Laboratory of Genetics & Genomics of Marine Resources and Environment, Dept. of Biological, Geological & Environmental Sciences, University of Bologna, 48100, Ravenna, Italy
9 : Centre de Recherches Océanologiques, 29 Rue des Pêcheurs, B.P. V 18 Abidjan, Cote d’Ivoire
10 : Seychelles Fishing Authority, PO BOX 449, Victoria, Mahe, Seychelles
11 : MARBEC, Univ. Montpellier, CNRS, Ifremer, IRD, Sète, France
Source Fisheries Research (0165-7836) (Elsevier BV), 2020-12 , Vol. 232 , P. 105726 (7p.)
DOI 10.1016/j.fishres.2020.105726
Keyword(s) Tuna fishery, Maternal effect, Yellowfin tuna, Reproductive potential
Abstract

How the size of female yellowfin tuna (Thunnus albacares) affects their spawning capability and fecundity is still an open and unresolved question due to the difficulties in investigating these complex effects in highly migratory pelagic marine fish species. However, this information is key to understanding the reproductive potential and resilience of the stock. We investigate how energetic resources are allocated for reproduction by female yellowfin tuna according to their size in the Gulf of Guinea (central-eastern Atlantic Ocean). Our results reveal that larger females have not only larger ovaries by virtue of their greater abdominal cavity, but also different fatty acid profiles in the gonads compared to smaller females, with potential effects on their spawning and recruitment patterns. This study contributes to the knowledge of size-dependent variation in female yellowfin tuna and paves the way for future studies on size-dependent effects on reproductive parameters in this species.

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Pecoraro C., Zudaire I., Galimberti G., Romeo M., Murua H., Fruciano C., Scherer C., Tinti F., Diaha N.C., Bodin Nathalie, Chassot Emmanuel (2020). When size matters: The gonads of larger female yellowfin tuna (Thunnus albacares) have different fatty acid profiles compared to smaller individuals. Fisheries Research, 232, 105726 (7p.). Publisher's official version : https://doi.org/10.1016/j.fishres.2020.105726 , Open Access version : https://archimer.ifremer.fr/doc/00644/75650/