Consulta: subjectFacets:"Fish aquaculture"
Registros recuperados: 2
Data/hora: 01/06/2024 07:59:22

Are sex ratios in wild European sea bass (Dicentrarchus labrax) populations biased?
Provedor de dados: 5
Autores: Vandeputte, Marc; Quillet, Edwige; Chatain, Beatrice.
Sex ratios in farmed European sea bass are highly biased towards males (75 to 95%), which is problematic for aquaculture. In this mini-review, we re-analyse fisheries literature data about sex ratios in wild sea bass from 13 population samples, representing altogether 4889 individuals covering the major part of the distribution range of the species. We find that as a whole, the sex ratio of wild populations is biased towards females (59.4% females, p &lt; 0.001), but that the sex ratio of the younger fish (&lt; 30 cm total length) is balanced (52.0% females, p = 0.15), while the sex ratio of the older fish is heavily biased towards females (69.5% females, p &lt; 0.01). Possible causes of these differences (differential longevity, biased sampling) are...
Tipo: Text
Palavras-chave: Sex ratio; Genetics; Sex determination; Fish aquaculture; Dicentrarchus labrax.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00078/18882/16450.pdf

Effect of dietary water content on European sea bass (Dicentrarchus labrax) growth and disease resistance
Provedor de dados: 5
Autores: Przybyla, Cyrille; Fievet, Julie; Callier, Myriam; Blancheton, Jean-paul.
The effect of dietary water content on Dicentrarchus labrax growth parameters and resistance to Vibrio anguillarum infection was investigated using commercial pellets with identical energy contents and different moisture levels. The first experiment hypothesis was that moisturizing pelleted ration can have an impact on Dicentrarchus labrax growth performance by the osmoregulation energy cost reduction. In a second time, the experiment explores the effect of water addition in pellets on the fish resistance to a disease. A specific device was built to uniformly moisturize dry pellets to different moisture levels, i.e. 8%, 20%, 40% and 60%. After an acclimation period and a 54-day rearing period, the control fish had grown from 72.7 +/- 17.9 g to 133.3 +/-...
Tipo: Text
Palavras-chave: Fish aquaculture; Dietary moisture content; Feed pellets; Fish growth; Immunity; Dicentrarchus labrax; Vibrio anguillarum.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00248/35927/34446.pdf