Untitled

Abstract

The effects of fish meal (FM ) and macroalgae (M A) substitution with fermented soybean meal and rice bran were tested on a commercial diet in juvenile abalone. Abalone (21600) individuals were distributed equally to four diet treatments. Four experimental diets were prepared: a Std diet, FM 50, FM50+M A50 and FM50+MA100. The standard diet (Std) consists of FM (140 g/kg), fermented soybean meal (250 g/kg), corn gluten meal (34 g/kg), shrimp meal (30 g/kg), wheat flour (200 g/kg), dextrin (50 g/kg) and M A (250 g/kg). Undaria and Laminaria were also prepared. The feeding trial lasted for 16 weeks. Survival of abalone fed the formulated diets was higher than that of abalone fed the Undaria and Laminaria. Weight gain and specific growth rate of abalone fed the Std diet were higher than all other diets. Substitutability of the fermented soybean meal for FM seemed to be rather limited in the commercial diet for abalone farms. However, another 500 g/kg M A in the commercial diet could be substituted with rice bran as long as 500 g/kg M A were substituted with rice bran. The FM 50+M A50 diet is the most recommendable for abalone farm in considering feed cost.

Growth performance and the soft body composition of juvenile abalone,Haliotis discus, Reeve 1846, fed the extruded pellets substituting fish meal and macroalgae with tunic meal of sea squirt,Halocynthia roretzi

“…Biological indices (shell length and width and the soft body weight) were well reflected from growth performance of abalone in this study. Similarly, the increased biological measurements of abalone agreed with improved growth performance of abalone (Ansary et al, 2019a(Ansary et al, , 2019bBaek et al, 2019;Choi et al, 2018;Jang et al, 2018;Lee et al, 2017;Myung et al, 2016).…”

“…showing the proximate composition of the soft body of abalone was heavily affected by dietary nutrient contents (Cho et al, 2008;Choi et al, 2018;Jang et al, 2018;Lee et al, 2017;Mai et al, 1995aMai et al, , 1995bMyung et al, 2016). The feasibility and suitability of tunic meal of SS as the alternative sources for FM and MA in the EPs were well proved in this study and their application will lead farmers to create higher benefit in considering feed cost and improved growth performance of abalone.…”

“…previous study indicating that protein (AA) and lipid (FA) contents in the nutrition-balanced diet enhanced the growth performances of abalone compared to MA (Cho, Park, Kim, & Yoo, 2008;Choi et al, 2018;Garcia-Esquivel & Felbeck, 2009;Jang et al, 2018;Jung et al, 2016;Kim, Lee, Han, & Park, 1998;Lee et al, 2017Lee et al, , 2018Lee, Lee, Jeong, & Yoo, 1997;Viana, Lopez, & Sales, 1993).…”

“…In recent years, inclusion of different sources of by-products in aquafeed have paid more attention (Jung et al, 2016;Lee et al, 2017Lee et al, , 2018Rohmah et al, 2016). Although applicability of tunic meal of SS substituted for MA and FM in abalone feed were successfully reported (Choi et al, 2018;Jang et al, 2018), their substitution effect in commercial EP on abalone must be proved before a practical application.…”

Substitution effect of Undaria pinnatifida with citrus ( Citrus unshiu , Marcovitch) peel by‐product in feed on the growth, body composition and air exposure stressor of juvenile abalone ( Haliotis discus , Reeve 1846)

“…The most important advantages of using fruit by-products as abalone diet are to reduce the dependence of abalone on MA, which is expensive and limited in seasonal availability with low nutrition, and to eradicate cost of waste compilation, transportation and management programme. Similarly, some studies have been reported comparable growth performance of aquatic animals including abalone fed the diets substituting MA with food and plant by-products (tuna by-product, tunic meal of sea squirt, rice bran and white radish by-product) for fish meal and MA Jeon, Kim, Myung, & Cho, 2014;Lee et al, 2016;Lee, Kim, Choi, et al, 2017a;Lee et al, 2018). The desirable effect of citrus peel on growth of land animals, such as rats (Lim, Lee, & Kim, 2014), broiler (Ebrahimi, Qotbi, Seidavi, & Bagar, 2014;Siyal et al, 2016) and rabbit (Ojabo, Adenkola, & Odaudu, 2012), has also been reported.…”