Effects of Dietary Carbohydrate Sources on Growth and Body Composition of Juvenile Abalone (Haliotis discus, Reeve)

Effect of Dietary Carbohydrate‐to‐Lipid Ratio on Growth and Carcass Composition of Juvenile Abalone, Haliotis discus, Reeve 1846

“…The highest survival and weight gain (SGR) were obtained in abalone fed the C48:L2 and C47:L3 diets, respectively, indicating that the optimal dietary C : L ratio was estimated to be in the region of 48:2 and 47:3 for performance of juvenile abalone. The fastest weight gain of abalone fed the C47:L3 diet corresponded with the largest values for other biological criteria (shell length, shell width, shell height, soft body weight, and the ratio of soft body weight to total weight of abalone) measured in this study, agreeing with other studies (Bautista‐Teruel et al ; Cho ; Myung et al ; Lee et al ). Similarly, Thongrod et al () showed that donkey's ear abalone grew the best on the 37.6% protein diet containing 52.1% C and 1.3% L when abalone were fed with 36–38% protein diets containing different ratios of C (35.6–52.1%) using starch as the main C source and L (1.3–19.0%) using fish oil as the main L source for 28 wk and concluded that weight gain decreased with the increased L and decreased C content in the diets, resulting from low feed intake probably because of high caloric value of L. The natural diet of abalone consisting of macroalgae is also composed of 40–50% C (Fleming et al ).…”

“…Weight gain and SGR (ranging from 0.77 to 0.92%/d) of abalone in this study were comparable to those (ranging from 0.28 to 0.34 (Jung et al ), from 0.45 to 0.46 (Kim et al ), from 0.31 to 0.37 (Myung et al ), and from 0.78 to 0.93%/d (Lee et al ), respectively) in the same species of abalone fed the formulated diet with similar experimental conditions in other studies. The highest survival and weight gain (SGR) were obtained in abalone fed the C48:L2 and C47:L3 diets, respectively, indicating that the optimal dietary C : L ratio was estimated to be in the region of 48:2 and 47:3 for performance of juvenile abalone.…”

“…High variation in crude L content in both diets was probably due to their low L content. Water stability (leaching‐out loss) of nutrients (crude protein and L and ash) in the experimental diets were comparable to other similar formulated diets (Lee et al , ). Because water stability of nutrient (crude protein and L and ash) content in the experimental diet in this study was relatively high, and given that the diets were supplied to abalone daily, leaching is unlikely to have negatively affected performance of abalone.…”

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)

“…Marín, Soler‐Rivas, Benavente‐García, Castillo, and Pérez‐Alvarez () reported that approximately 305 g/kg cellulose (dry matter basis) was found in peel of C. unshiu r. Since CPB contains relatively low lipid (11 g/kg vs. 31 g/kg) and high carbohydrate content (912 g/kg vs. 689 g/kg), calculated by the difference in 1,000 and sum of crude protein + crude lipid + ash content, compared to U. pinnatifida powder used in feed formulation (Table ), it seems to have high potential as a substitute for U. pinnatifida in abalone feed. Lee, Kim, Kim, et al () proved that abalone ( H. discus ) utilized cellulose the most effectively than other carbohydrate sources (dextrin, glucose, corn starch, maltose, sucrose and wheat flour) in the experimental diets. The greatest growth performance was obtained in abalone fed the CPB500 diet substituting 500 g/kg U. pinnatifida with CPB in this study.…”

Substitution effect of sea tangle (ST) (Laminaria japonica) with tunic of sea squirt (SS) (Halocynthia roretzi) in diet on growth and carcass composition of juvenile abalone (Haliotis discus, Reeve 1846)

“…Nevertheless, this did not cause any side‐effect on performance of abalone in this experimental condition. As wheat four was a promising carbohydrate source in abalone feed (Lee et al., ), supplementation of wheat flour up to 110/1000 g in the ST400 diet could accelerate weight gain and SGR of abalone. A careful attention should be given in formulating experimental diet to evaluate dietary substitution effect for sea tangle on abalone.…”