Ethanol-soluble components in soybean meal influence the digestive physiology, hepatic and intestinal morphologies, and growth performance of the marine fish pompano (Trachinotus blochii)
| Autor: | Thinh Van Do, Trung Anh Trieu, Nang Thu Tran Thi, Hung Phuc Nguyen |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
040301 veterinary sciences
medicine.drug_class Soybean meal Feed conversion ratio 0403 veterinary science Animal science Fish meal Nutrient Food Animals Digestive System Physiological Phenomena medicine Animals Bile acid biology Ethanol Chemistry 0402 animal and dairy science 04 agricultural and veterinary sciences biology.organism_classification 040201 dairy & animal science Animal Feed Diet Liver Digestive enzyme Pompano biology.protein Animal Science and Zoology Animal Nutritional Physiological Phenomena Digestion Soybeans medicine.symptom Weight gain |
| Zdroj: | Journal of animal physiology and animal nutritionREFERENCES. 105(4) |
| ISSN: | 1439-0396 |
| Popis: | This study aimed to examine the effects of ethanol-soluble components (Es) in soybean meal (SBM) on gut content transit, bile acid (BA) and pancreatic digestive enzyme secretions, nutrient apparent digestibility coefficients (ADC), liver and intestinal morphologies, and growth performance of pompano (Trachinotus blochii). The SBM was extracted with aqueous ethanol, then the supernatant and residue were separated and dried to produce ethanol-extracted SBM (ESBM) and the Es. Four experimental diets were formulated with fish meal (FM), ESBM and SBM as main dietary protein sources. The diets were denoted as follows: FMD (FM diet), SBMD (SBM diet), ESBMD (ESBM diet) and ESBM + EsD (ESBM plus Es diet). Thirty-five fingerling pompano with an initial body weight (BW) of 18.3 g were allocated to each of 12 polyvinyl chloride tanks (1000-L holding capacity), resulting in triplicate tanks per dietary treatment. For 10 weeks, the fish were hand-fed the experimental diets to apparent satiation twice daily. The results showed that the final BW, weight gain and specific growth rate were significantly lower, while the feed conversion ratio was higher in the SBMD and ESBM + EsD groups than in the ESBMD and FMD groups (p < 0.05). Fish fed SBMD and ESBM + EsD showed accelerated gastric transit, slowed intestinal mobility, and lowered secretions of BAs and pancreatic digestive enzymes as compared to those fed ESBMD and FMD. Morphological abnormalities in mucosal folds of the posterior intestine, but not the liver, were clearly observed in the SBMD and ESBM + EsD groups. These results indicated that the Es in SBM inhibited the digestive system, leading to decreased nutrient digestibility and growth performance in pompano. The findings of the present study suggested that removal of the Es would effectively improve the nutritional quality of SBM and enhance growth performance of pompano fed a SBM-based diet. |
| Databáze: | OpenAIRE |
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