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Impact of arachidonic acid enrichment of live rotifer prey on bacterial communities in rotifer and larval fish cultures ArchiMer
Seychelles, Laurent H.; Doiron, Kim; Audet, Celine; Tremblay, Rejean; Pernet, Fabrice; Lemarchand, Karine.
Rotifers (Brachionus plicatilis), commonly used at first feeding in commercial fish hatcheries, carry a large bacteria load. Because they are relatively poor in essential fatty acids, it is common practice to enrich them with fatty acids, including arachidonic acid (AA). This study aims to determine whether prey enrichment with AA may act as a prebiotic and modify the microbial community composition either in AA-enriched rotifer cultures or in larval-rearing water using winter flounder (Pseudopleuronectes americanus) as a larval fish model. AA enrichment modified the bacterial community composition in both the rotifer culture tanks and the larval-rearing tanks. We observed an increase in the number of cultivable bacteria on TCBS (thiosulfate-citrate-bile...
Tipo: Text Palavras-chave: Communauté bactérienne; Rotifères; Enrichissement en acide arachidonique; Vibrio sp.; Prébiotique; Bacterial community; Rotifers; Arachidonic acid enrichment; Vibrio sp.; Prebiotic.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00137/24778/25189.pdf
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Will global warming affect the functional need for essential fatty acids in juvenile sea bass (Dicentrarchus labrax)? A first overview of the consequences of lower availability of nutritional fatty acids on growth performance ArchiMer
Gourtay, Clemence; Chabot, Denis; Audet, Celine; Le Delliou, Herve; Quazuguel, Patrick; Claireaux, Guy; Zambonino-infante, Jose-luis.
Global climate changes have led to a depletion in omega-3 polyunsaturated fatty acids (n-3 PUFA) in marine phytoplankton that—with food web transfers—could negatively impact fish performance. The aim of this study was to assess the effect of a reduction in the dietary availability of n-3 PUFA on growth performance, organ allometry, and fatty acid composition in juvenile European sea bass (Dicentrarchus labrax) raised at two different temperatures: 15 °C (natural conditions) and 20 °C (global warming scenario). Fish were fed for 5 months with two isoenergetic and isoproteic diets: a reference diet (RD; 1.65% n-3 PUFA on a dry matter basis, DM) used as a proxy of trophic networks where n-3 PUFA were plentiful, and a lower n-3 PUFA diet (LD; 0.73% n-3 PUFA on...
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Ano: 2018 URL: https://archimer.ifremer.fr/doc/00454/56543/58335.pdf
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