Effect of the Formulated Diets on Performance and Resistance of Juvenile Abalone [Haliotis discus(Reeve, 1846)] Subjected to Various Stress Conditions

Inclusion effect of soybean meal, fermented soybean meal, and Saccharina japonica in extruded pellet for juvenile abalone (Haliotis discus, Reeve 1846)

“…The retained crude protein and lipid and ash content in the extruded pellets were changed with time in this study, but no distinctive difference was found in either crude protein or crude lipid except at 48 h after in seawater immersion. Water stability of nutrients in extruded pellets obtained in this study seems to be rather high than those reported in other studies (Bautista-Teruel et al 2003;Gómez-Montes et al 2003;Lee et al 2016;Lee et al 2018a, b), but comparable to that reported by Mai et al (1995a). None of proximates of soft body of abalone was affected by the experimental diets in this study.…”

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)

“…Higher retention of dry matter, crude protein, crude lipid and ash contents in all formulated diets compared to the dry U. pinnatifida at all period of observations, except for crude lipid content in the CPB1000 diet at 12 hr after seawater immersion in this study, was partially accountable for superior growth performance of abalone fed the formers to the latter. This could be well explained by other studies showing that higher water stability of nutrients in formulated feeds compared to the single U. pinnatifida could be another reason for superior growth performance of abalone (H. discus) fed the formers(Ansary et al, 2019b;Lee et al, 2018) Lee et al (2016). also reported that the retained dry matter and crude protein content were lower in U. pinnatifida compared to all extruded pellets and S. japonica at 12 hr after seawater immersion, whereas the lower retained dry matter, crude lipid and ash content were observed in both single MA (U. pinnatifida and S. japonica) at 24, 48 and 72 hr after seawater immersion compared to all extruded pellets substituting fish meal and MA (the mixture of U. pinnatifida and Hizikia fusiforme Harvey at the ratio…”

“…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.…”

“…This could be well explained by other studies showing that higher water stability of nutrients in formulated feeds compared to the single U. pinnatifida could be another reason for superior growth performance of abalone ( H. discus ) fed the formers (Ansary et al, ; Lee et al, ). Lee et al () also reported that the retained dry matter and crude protein content were lower in U. pinnatifida compared to all extruded pellets and S . japonica at 12 hr after seawater immersion, whereas the lower retained dry matter, crude lipid and ash content were observed in both single MA ( U. pinnatifida and S .…”

“…Abalone are commonly subjected to air exposure stress during many farm activities, such as larval movement to grow‐out tanks, size grading and live transport (Morash & Alter, ) and cleaning of shelter (Lee et al, ). Higher cumulative mortality of abalone fed the CPB0 diet and dry U. pinnatifida compared to all other formulated (CPB250, CPB500, CPB750 and CPB1000) diets was observed at 16 hr after 24‐hr air exposure until the end of 4 days postobservation period in this study, indicating that substitution of U. pinnatifida with CPB highly improved resistance of abalone to 24‐hr air exposure.…”