Impact of krill (Euphausia superba) meal on growth performance of aquatic animals: A meta-analysis and prospective directions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F25%3A43909661" target="_blank" >RIV/60076658:12520/25:43909661 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.aninu.2024.11.024" target="_blank" >https://doi.org/10.1016/j.aninu.2024.11.024</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.aninu.2024.11.024" target="_blank" >10.1016/j.aninu.2024.11.024</a>

Result language

angličtina

Original language name

Impact of krill (Euphausia superba) meal on growth performance of aquatic animals: A meta-analysis and prospective directions

Original language description

Antarctic krill meal (KM) (Euphausia superba) as a substitute for fishmeal in aquatic animal diets is gaining popularity worldwide. A quantitative approach investigating the efficacy of using this protein on the production performance of aquatic animals remains widely limited. Here, we employed a meta-analysis to quantify the overall effects (Hedges&apos;g [g] value effect size) of KM on the specific growth rate (SGR), feed conversion ratio (FCR), protein efficiency ratio (PER), and survival rate (SR) of several aquaculture species. A total of 22 records published during 2006 to 2022 from different countries, targeting 14 aquatic species, were employed in the present study. Overall, KM has a high nutritional value relative to fishmeal, particularly from the high protein and amino acid composition. Dietary KM significantly increased the overall effect size of SGR (g = 1.92) (P = 0.001); the positive effect was illustrated in marine species (g = 1.32 to 9.10) (P &lt; 0.05) and sturgeon (Acipenser gueldenstaedtii) (g = 6.59) (P &lt; 0.001). The overall g value for FCR (-2.42) was significantly improved compared to the control group (P &lt; 0.001). The inclusion of KM in aquatic animal diets did not affect g value of PER (1.52, 95% confidence interval: -1.04 to 4.07) and survival rate (0.08, 95% confidence interval: -0.63 to 0.79) (P = 0.252 and 0.208, respectively). The meta-regression models indicated that SGR of rainbow trout (Oncorhynchus mykiss) was significantly correlated with dietary KM by a positive linear model (P = 0.022). The cod and sturgeon (A. gueldenstaedtii) appeared to efficiently utilize krill-containing diets as illustrated by a negative linear model (P = 0.011 and P = 0.024, respectively) between dietary KM and FCR. Dietary KM positively correlated with PER for Atlantic cod (P = 0.021). Our meta-analysis highlighted the significant outcome of KM in diets for aquaculture species by reducing pressure on forage fish from marine resources and sparing edible foods. Specifically, including KM significantly reduced economic fish-in fish-out (eFIFO) in four taxa - the top forage fish consumers (P &lt; 0.05): marine fish, salmon, shrimp, and trout. The meta-analysis revealed the decreased food-competition feedstuff in diets for important aquaculture species (P &lt; 0.05) fed dietary KM. The outlook for efficient use of KM from marine resources in aquafeeds was elucidated in the present work. (c) 2025 The Authors. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/).

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

40103 - Fishery

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Animal Nutrition

ISSN

2405-6383

e-ISSN

2405-6545

Volume of the periodical

20

Issue of the periodical within the volume

neuvedeno

Country of publishing house

CN - CHINA

Number of pages

12

Pages from-to

487-498

UT code for WoS article

001447729400001

EID of the result in the Scopus database

2-s2.0-85218449591