Effect of dietary water content on European sea bass (Dicentrarchus labrax) growth and disease resistance. Issue 2 (16th December 2014)

• Record Type: Journal Article
• Authors: Przybyla, Cyrille; Fievet, Julie; Callier, Myriam; Blancheton, Jean-Paul
• Is Part Of: Aquatic living resources. Volume 27:Issue 2(2014)
• Page Start: 73
• Page End: 81
• Publication Date: 2014-12-16
• Subjects: Fishery resources -- Periodicals; Fishery resources -- France -- Periodicals; Aquatic resources -- Periodicals; Aquatic resources -- France -- Periodicals; Aquatic biology -- Periodicals; Aquatic biology -- France -- Periodicals; Aquaculture -- Periodicals; Aquaculture -- France -- Periodicals; 639.8
• DOI: 10.1051/alr/2014007
• Languages: English
• ISSNs: 0990-7440

Abstract

<abstract abstract-type="normal" xml:lang="en"> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>The effect of dietary water content on <italic>Dicentrarchus labrax </italic>growth parameters and resistance to <italic>Vibrio anguillarum </italic>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 <italic>Dicentrarchus labrax </italic>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 ± 29.4 g. No significant differences were recorded for fish growth parameters. After the growth period, the tagged fish were mixed and challenged by bath exposure to live <italic>Vibrio anguillarum </italic>in triplicate. After 7 days, mortality was significantly lower in the group of fish fed with pellets containing 60% water. Adding water to <italic>Dicentrarchus labrax </italic>feed did not affect fish growth parameters but increase its resistance to a <italic>Vibrio anguillarum </italic>infection<italic>.</italic> The moisturizing process could be used to add specific compounds (such as probiotics or vitamins) to pellets just before fish feeding and could have a positive effect on fish rearing. </p> </abstract>