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Effects of hypoxia and elevated ammonia concentration on the viability of red snapper embryos and early larvae ArchiMer
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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Can Lutjanus purpureus (South red snapper) be "legally" considered a red snapper (Lutjanus campechanus)? Genet. Mol. Biol.
Gomes,Grazielle; Schneider,Horacio; Vallinoto,Marcelo; Santos,Simoni; Orti,Guillermo; Sampaio,Iracilda.
Red snappers (Lutjanus purpureus in Brazil and Lutjanus campechanus in USA and Gulf of Mexico) are both under clear effect of overfishing. Because of their high morphological similarity it has already been suggested that they could possibly be considered as a single species. To investigate the degree of similarity and the genetic structure of red snapper populations we constructed a common dataset of partial D-loop mtDNA sequences of L. purpureus from Brazil (Amapá, Pará and Maranhão) and L. campechanus from the Atlantic coast of the USA (Florida, Louisiana and Mississippi). Phylogenetic and population genetic analyses surprisingly depicted high similarity between L. campechanus and L. purpureus, compatible with the hypothesis of a single species of red...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Red snapper; Lutjanus purpureus; Lutjanus campechanus; Population genetic structure; Mitochondrial D-loop.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200035
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