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| Faggion, Sara; Vandeputte, Marc; Vergnet, Alain; Clota, Frederic; Blanc, Marie-odile; Sanchez, Pierre; Ruelle, Francois; Allal, Francois; Wang, Hanping. |
| The European sea bass (Dicentrarchus labrax) exhibits female-biased sexual size dimorphism (SSD) early in development. New tagging techniques provide the opportunity to monitor individual sex-related growth during the post-larval and juvenile stages. We produced an experimental population through artificial fertilization and followed a rearing-temperature protocol (~16°C from hatching to 112 days post-hatching, dph; ~20°C from 117 to 358 dph) targeting a roughly balanced sex ratio. The fish were tagged with microchips between 61 and 96 dph in five tagging trials of 50 fish each; individual standard length (SL) was recorded through repeated biometric measurements performed between 83 to 110 dph via image analyses. Body weight (BW) was modelled using the... |
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| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00691/80288/83391.pdf |
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| Faggion, Sara; Vandeputte, Marc; Chatain, Beatrice; Gagnaire, Pierre-alexandre; Allal, Francois. |
| Polygenic sex determination (PSD) may show variations in terms of genetic and environmental components between populations of fish species exposed/adapted to different environments. The European sea bass (Dicentrarchus labrax) is an interesting model, combining both a PSD system and a genetic subdivision into an Atlantic and a Mediterranean lineage, with genetic substructures within the Mediterranean Sea. Here, we produced experimental progeny crosses (N = 927) from broodstock sampled in four wild populations (North Atlantic, NAT; Western Mediterranean, WEM; North-Eastern Mediterranean, NEM; South-Eastern Mediterranean, SEM). We found less females than males in the progeny, both in the global dataset (32.5%) and within each paternal group (from 25.1% for... |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00464/57609/59864.pdf |
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