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kfas, vol. 57, no. 4, pp.349-354, August, 2024 DOI. https://doi.org/10.5657/KFAS.2024.0349

Effects of Dietary Substitution of Undaria pinnatifida with Laver Porphyra tenera By-product on Juvenile Abalone Haliotis discus hannai

김준·김강웅·정성목·배진호·황일기1·김신권2·허상우*
국립수산과학원 사료연구센터, 1국립수산과학원 수산식물품종관리센터, 2국립수산과학원 양식연구과

ABSTRACT

This study investigates the effectd of substituting Undaria pinnatifida with a laver Porphyra tenera by-product (LB) on the growth performance, and soft body composition of juvenile abalone Haliotis discus hannai. A total of 750 juvenile abalones were evenly distributed across 15 tanks with 90 individuals per tank. Five diets were formulated; a control diet (Con) containing 30% U. pinnatifida and four experimental diets in which 25%, 50%, 75%, and 100% U. pinnatifida were substituted with equal amounts of LB (LB25, LB50, LB75, and LB100, respectively). The feeding trial lasted for 6 weeks, with daily feeding at 16:00. Survival rate, growth performance (weight gain and specific growth rate), and soft body composition of the abalones were not affected by the substitution levels (P>0.05). Therefore, this study concluded that complete replacement of LB with 100% U. pinnatifida in the abalone diet did not adversely affect survival, growth performance, or soft body composition.
Keyword

Undaria pinnatifida, Laver by-product, Porphyra tenera, Abalone, Formulated diet