Ireland: Krill shown to boost bass performance

Published 2021년 7월 8일

Tridge summary

A recent study published in Aquaculture and conducted by researchers from the GIA IU-ECOAQUA and Aker BioMarine has found that replacing fishmeal with Antarctic krill meal in the diets of European sea bass can improve growth performance, feed utilization, and liver health. The study, which involved feeding the fish diets with varying krill meal contents for 12 weeks, noted a 20% improvement in fish growth, increased feed intake, and higher specific growth rate when krill-derived phospholipids rich in n-3 HUFA were included in the diet. Additionally, the use of krill meal was shown to decrease liver vacuolization levels and potentially reduce cholesterol synthesis in the fish's liver, suggesting a positive effect on liver lipid metabolism.

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Original content

So concludes a new study, recently published in Aquaculture, undertaken by scientists from the Research Group in Aquaculture (GIA) IU-ECOAQUA (Spain) and Aker BioMarine. In the study, European sea bass (Dicentrarchus labrax) were fed a practical diet with either a 15 percent fishmeal content or the same diet substituted by 30 percent or 50 percent Antarctic krill meal for 12 weeks in triplicates. At the end of the feeding trial, growth performance, liver morphology, liver proximate composition, lipid classes and fatty acid profiles, as well as the expression of hepatic genes related with lipid metabolism, were evaluated. The study concludes that there are multiple benefits of replacement fishmeal with Antarctic krill meal in diets for marine fish. “A sustainable growth of the aquaculture industry implies the use of eco-friendly ingredients as alternative to the traditional marine protein and lipid sources,” said Silvia Torrecillas senior researcher at GIA. “Our results indicate ...

Source: Thefishsite