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| Bardon-albaret, Agnes; Saillant, Eric. |
| The effects of hypoxic conditions and elevated ammonia concentrations on the viability of embryos and newly hatched larvae of the red snapper (Lutjanus campechanus) were investigated. In all experiments, tested levels of hypoxia or ammonia concentrations were applied to embryos and unfed newly hatched larvae from three different spawns. Exposures began at 1 h post fertilization (pf) and lasted until all individuals in a group had expired. Survival rates were monitored daily in duplicates for each spawn in each treatment. Fertilized eggs exposed to 2 mg L− 1 dissolved oxygen (29% saturation) showed complete mortality before hatch while 81% of embryos in control groups (> 85% saturation) hatched and subsequently maintained high survival until 5 days pf.... |
| Tipo: Text |
Palavras-chave: Lutjanus campechanus; Hypoxia; Ammonia; Egg quality; Stress; Water quality. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00321/43188/42735.pdf |
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| Antoni, Luca; Luque, Patricia L.; Naghshpour, Kaylie; Reynal, Lionel; Saillant, Eric. |
| Twenty homologous microsatellite markers, or simple sequence repeats (SSRs), were developed for blackfin tuna (Thunnus atlanticus) through the use of a direct Seq-to-SSR approach. The number of alleles per locus ranged between 5 and 26, and the expected heterozygosity ranged between 0.640 and 0.969. Three loci displayed significant departure from Hardy-Weinberg equilibrium expectations, likely reflecting occurrence of null alleles. Another locus showed consecutive alleles that differed by one base pair only. Consequently, this locus may be prone to elevated rates of scoring errors. The remaining 16 loci will be valuable for studies in conservation genetics of blackfin tuna. |
| Tipo: Text |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00239/34999/33529.pdf |
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| Saillant, Eric. |
| The objective of this work was to describe gonadogenesis and sexual growth dimorphism in cultured sea bass Dicentrarchus labrax and to study sex determination in this species. Gonadogenesis was studied at the histological level in a population constituted of 30 sibs of sea bass. Sexual differentiation occurred between 125 and 416 days post-hatching (dph) (individual weights between 2.6 and 30g). 93% of the fish differentiated as males, 59% of these showing intratesticular oocytes. 30% of the males, among the biggest, differentiated early [165 days post hatching (dph)] and started spermatogenesis in their first year of life. Ovarian differentiation also occurred early (165 dph) and females were heavier than males from 188 dph. The evolution of the... |
| Tipo: Text |
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| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00446/55745/57400.pdf |
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