Published 2024

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Publication details

Journal : Fishes , vol. 9 , p. 1–10 , 2024

International Standard Numbers :
Electronic : 2410-3888

Publication type : Academic article

Contributors : Bøgwald, Isak; Herrig, Simon; Pedersen, Alice Marie; Wubshet, Sileshi Gizachew; Eilertsen, Karl-Erik

Issue : 4

Research areas

Feed development and nutrition

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Kjetil Aune
Chief Librarian
kjetil.aune@nofima.no

Summary

Shrimp feed formulations have moved towards less fish meal and more of the readily available and cheaper plant proteins. To counteract the lower attractiveness and palatability of plant proteins, feeds are supplemented with ingredients known to have chemoattractive properties that will increase feed intake. This study investigated the putative chemoattractive effect of Calanus finmarchicus hydrolysate, when used as a dietary supplement in shrimp feeds. C. finmarchicus is a zooplankton species native to the northern Atlantic Ocean and is a novel and sustainable raw material for shrimp feed products. Diet attractiveness was evaluated in a 24-day feeding trial with whiteleg shrimp (Litopenaeus vannamei) by measuring the intake of 12 diets with various levels of fish meal, calanus hydrolysate, and krill (Euphausia superba) meal. Higher inclusion rates of both ingredients resulted in increased feed intakes, and supplementing the high fish meal diet with calanus hydrolysate gave a statistically significant higher feed intake. Low molecular weight peptides, chemoattractive amino acids, and the water-soluble nature of the hydrolysate could explain the chemoattractive properties observed in the study.

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