A holistic approach to development of diets for Ballan wrasse (Labrus berggylta) – a new species in aquaculture
نویسندگان
چکیده
Wild wrasses are used for delousing of farmed salmon but increasing demands have prompted the salmon industry to develop cultures of Ballan wrasse. One of the bottlenecks has been nutrition and feed intake in the juvenile phase, while broodstock nutrition is considered critical for production of viable offspring. The present study was aimed at developing functioning ongrowing and broodstock diets for Ballan wrasse. In juveniles the best lengthwise growth was identified at 65% dietary protein, 12% lipid and 16% carbohydrate. To investigate if the requirements for the other nutrients were covered by the diets developed for the species, the nutrient composition in juveniles (whole body) and broodstock (female gonad) were analyzed and compared to the composition in wild fish. We found that the levels of the lipid soluble Vitamins A, K and D were lower in cultured than in wild fish, however, the requirements for these nutrients in Ballan wrasse are not known. Other candidate nutrients for more in-depth investigation are the bone minerals, zinc, taurine and fatty acids.
منابع مشابه
Organogenesis of Ballan Wrasse Labrus Bergylta (Ascanius 1767) Larvae)
The ballan wrasse, Labrus bergylta, Ascanius 1767, is a promising species for use as a cleaning fish for salmon farms in the northern hemisphere, due to their cleaning behaviour and their ability to remain active at low temperatures [1]. It is commonly agreed that a potential increase in the demand for ballan wrasse from the industry must be met by future aquaculture production of this species....
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