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| Darnaude, Audrey M; Labonne, Maylis; Petit, Cécile; Médieu, Anais; Pernak, Marianne; Nikolic, Natacha; Artetxe-arrate, Iraide; Clear, Naomi; Farley, Jessica; Eveson, Paige; Lozano-montes, Hector; Davies, Campbell; Marsac, Francis. |
| Variation in otolith elemental fingerprints was investigated in the broadbill swordfish (Xiphias gladius) to complement genetic data obtained by next generation sequencing in the framework of a collaborative project on population stock structure of tuna, billfish and sharks of the Indian Ocean (PSTBS-IO). Swordfish specimens for this work were sampled in the southwest (SWI), west central (WCI) and southeast (SEI) regions of the Indian Ocean. A total of 70 otoliths (30 from SWI and 20 from each WCI and SEI) were selected and the elemental signatures of their cores were analysed by LA-ICP-MS to investigate potential differences in spawning origin among regions. Among the 15 chemical elements analysed, only Mg, P, Sr, Ba and B were above detection limits and... |
| Tipo: Text |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00652/76400/77439.pdf |
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| Floch, Laurent; Depetris, Mathieu; Dewals, Patrice; Duparc, Antoine; Kaplan, David; Lebranchu, Julien; Marsac, Francis; Pernak, Marianne; Bach, Pascal. |
| In 2018, a total of 14 French vessels operated in the eastern Indian Ocean including 12 purse seiners and 2 supplies. The total capacity weighted by the months of activity for each vessel is 11686t. The total nominal effort in 2018 was of 2885 fishing days and 2723 sets with 2463 sets on floating objects and 260 on free schools. In 2018, the percentage of sets on FOB was 90% and the catches reached 91%. The total catch of the French component of the EU purse seine fleet of the Indian Ocean was 84,729 t, being composed of 36%, 58%, and 6% of yellowfin tuna, skipjack tuna, and bigeye tuna respectively. Thus, the most noticeable change in 2018 is the shift of catches from the free school sets, dominated by yellowfin, to the associated school sets, dominated... |
| Tipo: Text |
Palavras-chave: Tropical tuna fisheries; French purse seining; Free swimming school; Fish aggregating devices; Katsuwonus pelamis; Thunnus albacares; Thunnus obesus. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00590/70259/68318.pdf |
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