INSECTS IN THE FEED OF RAINBOW TROUT, ONCORHYNCHUS MYKISS (ACTINOPTERYGII, SALMONIDAE): EFFECT ON GROWTH, FATTY ACID COMPOSITION, AND SENSORY ATTRIBUTES

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F20%3A43900941" target="_blank" >RIV/60076658:12520/20:43900941 - isvavai.cz</a>

Result on the web

<a href="https://www.aiep.pl/volumes/2020/1_2/pdf/05_02785_F1.pdf" target="_blank" >https://www.aiep.pl/volumes/2020/1_2/pdf/05_02785_F1.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3750/AIEP/02785" target="_blank" >10.3750/AIEP/02785</a>

Result language

angličtina

Original language name

INSECTS IN THE FEED OF RAINBOW TROUT, ONCORHYNCHUS MYKISS (ACTINOPTERYGII, SALMONIDAE): EFFECT ON GROWTH, FATTY ACID COMPOSITION, AND SENSORY ATTRIBUTES

Original language description

Background. An ongoing quest for alternative feed sources in global aquaculture includes insect breeding for feed and food production. The aim of this study was to evaluate the effect of partial to full replacement of commercial diets with live insects on growth and health parameters of rainbow trout, as well as on sensory and texture attributes and fatty acid composition of fish muscle. Material and methods. Five isocaloric diets containing commercial pellets and live insects were evaluated in rainbow trout, Oncorhvnchus mykiss (Walbaum, 1792), in a 60-day feeding trial. Control Group (K) was fed commercial pellets only. In other groups, 25% gross energy of pellets was replaced by live adult house cricket, Acheta domestica (Group C), live superworm, Zophobas mono larvae (Group L), or a combination of 12.5% crude energy of each (group LC). The insect-only group (I) was fed live cricket and superwonn only (50% by 50% crude energy). Results. No significant differences were found in growth, survival, feed conversion ratio (dry basis), or energy utilization between groups. The protein efficiency ratio was highest in Group K and decreased with increasing cricket proportion. Insect inclusion was associated with lower content of nutritionally valuable n-3 fatty acid in fish muscle. Subjective sensory evaluation of cooked fillets revealed significantly less acceptable taste, aroma, and aftertaste in Group I than for Groups K, L, and LC. Some differences were found in the whiteness and redness of fillets between groups. The control group had significantly lower hardness compared to those receiving insect diets. No gross morphological or histopathological anomalies of viscera in any group and no significant differences in 7-ethoxyresorufin-O-deethylase activity were observed. Conclusions. Live insects replaced the commercial diet of the equivalent caloric level without negative effects on the growth or health of rainbow trout. The lower content of n-3 fatty acids and differences in color and texture of fillets from fish fed insects may influence acceptability to consumers. The high cost of insects compared to commercial feed currently limits their widespread use in trout production.

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

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2020

Confidentiality

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

Name of the periodical

Acta Ichthyologica et Piscatoria

ISSN

0137-1592

e-ISSN

—

Volume of the periodical

50

Issue of the periodical within the volume

2

Country of publishing house

PL - POLAND

Number of pages

11

Pages from-to

171-181

UT code for WoS article

000553162900005

EID of the result in the Scopus database

2-s2.0-85085999730