한국수산과학회

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  • pISSN : 2234-8395
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  • eISSN : 2234-1757

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kfas, vol. 52, no. 2, pp.149-158, April, 2019
DOI. https://doi.org/10.5657/KFAS.2019.0149

Effects of Fish Meal Replacement in Extruded Pellet Diet on Growth,
Feed Utilization and Digestibility in Olive Flounder Paralichthys olivaceus
압출성형 배합사료 내 어분대체가 넙치(Paralichthys olivaceus)의 성장,
사료효율 및 소화율에 미치는 영향

김민기·이초롱·신재형·이봉주1·김강웅2·이경준*
제주대학교 해양생명과학과, 1국립수산과학원 사료연구센터, 2국립수산과학원 양식관리과

This study investigated the effects of replacing fish meal (FM) with a mixture of four protein sources (wheat gluten,
soy protein concentrate, tankage meal, and poultry byproduct meal) in an extruded pellet (EP) diet for olive flounder
Paralichthys olivaceus. Five experimental diets were formulated with alternative proteins replacing 0%, 20%, 30%,
40%, and 50% of FM. Taurine and betaine were added as attractants in the diets. Triplicate groups of fish (initial body
weight: 196±2 g) were fed the diets to apparent satiation. Over the course of a 6-month feeding trial, there were no
significant differences between the groups in growth performance, feed utilization, survival, or villus height. The dry
matter and protein digestibility of FM50 diet were significantly lower than those of the control diet at water temperatures
below 18.5℃ in months 4 and 6. This is a highly significant first report on FM replacement in an EP diet given
to olive flounder over a 6-month-long feeding period. It shows that the proper mixture of protein sources can replace
up to 50% of FM in olive flounder EP diets with taurine and betaine supplementation. It also shows that 40% of FM
could be safely replaced in EP diets during periods of low water temperature.

Keyword : Fish meal, Long-term feeding, Olive flounder, Low-fish meal diet, Extruded pellet

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