Research was conducted on topmouth culter (Culter alburnus) grown in ponds and lakes as well as wild types in order to determine their chemical composition and nutritional value. There are three types of fish that dif...Research was conducted on topmouth culter (Culter alburnus) grown in ponds and lakes as well as wild types in order to determine their chemical composition and nutritional value. There are three types of fish that differ in their proximate composition, amino acids, fatty acids, and minerals. Wild fish had a significantly lower crude lipid contents than cultured fish (P P ∑PUFAs) showed an obviously opposite trend. As compared with cultured fish, wild fish had significantly higher levels of n-3 PUFAs, arachidonic acid (AA), eicosapentaenoic acid (EPA) and docosahxaenoic acid (DHA) (P P > 0.05), except for Na, Fe and Se. In conclusion, diet composition and external aqueous environment may determine the differences between wild and cultured topmouth culter.展开更多
本文旨在研究饲料蛋白水平、豆粕替代鱼粉对翘嘴红鲌(Erythroculter ilishaefor mis bleeker)消化酶活性的影响。以红鱼粉为饲料蛋白源,配制5个不同蛋白水平(31.04%、35.51%、40.89%、46.62%和50.33%)的等能、等必需氨基酸(EAA)平衡关...本文旨在研究饲料蛋白水平、豆粕替代鱼粉对翘嘴红鲌(Erythroculter ilishaefor mis bleeker)消化酶活性的影响。以红鱼粉为饲料蛋白源,配制5个不同蛋白水平(31.04%、35.51%、40.89%、46.62%和50.33%)的等能、等必需氨基酸(EAA)平衡关联度的的半精制饲料,研究蛋白水平对翘嘴红鲌消化酶活性的影响;又以豆粕替代鱼粉,大豆蛋白分别替代0.0%、13.5%、27.0%、40.5%、54.0%的鱼粉蛋白,配制5个等蛋白、等能和不同EAA关联度的半精制饲料,研究饲料中豆粕替代鱼粉对翘嘴红鲌消化酶活性的影响。试验结果表明,饲料蛋白水平对翘嘴红鲌肠道和肝胰脏的蛋白酶活性具有显著影响,肠道和肝胰脏蛋白酶活性随着饲料蛋白水平提高呈显著增强(P<0.05)。饲料蛋白水平为50.33%时,肠道蛋白酶活性最高,达171.26U/mgPr,显著高于31.04%饲料蛋白组(P<0.05);40.89%和46.62%饲料蛋白组的肝胰脏蛋白酶活性分别为35.04U/mgPr和35.68U/mgPr,显著高于31.04%和35.51%组(P<0.05)。饲料蛋白水平对肠道和肝胰脏的淀粉酶与脂肪酶活性没有显著影响(P>0.05)。饲料中豆粕替代鱼粉对翘嘴红鲌肠道和肝胰脏的蛋白酶活性具有显著影响,肝胰脏和肠道的蛋白酶活性都随着豆粕替代量提高而显著降低(P<0.05)。豆粕替代量为40.5%时,肠道蛋白酶活性为133.0U/mgPr,显著低于对照组(P<0.05),27.0%大豆蛋白替代组的肝胰脏的蛋白酶活性为31.34U/mgPr,显著低于对照组(P<0.05)。肠道淀粉酶活性没有受到豆粕替代鱼粉的影响(P>0.05),但肝胰脏淀粉酶活性随着豆粕替代量的提高而增强(P<0.05)。肝胰脏和肠道的脂肪酶活性不受饲料中豆粕替代鱼粉的影响(P>0.05)。展开更多
文摘Research was conducted on topmouth culter (Culter alburnus) grown in ponds and lakes as well as wild types in order to determine their chemical composition and nutritional value. There are three types of fish that differ in their proximate composition, amino acids, fatty acids, and minerals. Wild fish had a significantly lower crude lipid contents than cultured fish (P P ∑PUFAs) showed an obviously opposite trend. As compared with cultured fish, wild fish had significantly higher levels of n-3 PUFAs, arachidonic acid (AA), eicosapentaenoic acid (EPA) and docosahxaenoic acid (DHA) (P P > 0.05), except for Na, Fe and Se. In conclusion, diet composition and external aqueous environment may determine the differences between wild and cultured topmouth culter.
文摘本文旨在研究饲料蛋白水平、豆粕替代鱼粉对翘嘴红鲌(Erythroculter ilishaefor mis bleeker)消化酶活性的影响。以红鱼粉为饲料蛋白源,配制5个不同蛋白水平(31.04%、35.51%、40.89%、46.62%和50.33%)的等能、等必需氨基酸(EAA)平衡关联度的的半精制饲料,研究蛋白水平对翘嘴红鲌消化酶活性的影响;又以豆粕替代鱼粉,大豆蛋白分别替代0.0%、13.5%、27.0%、40.5%、54.0%的鱼粉蛋白,配制5个等蛋白、等能和不同EAA关联度的半精制饲料,研究饲料中豆粕替代鱼粉对翘嘴红鲌消化酶活性的影响。试验结果表明,饲料蛋白水平对翘嘴红鲌肠道和肝胰脏的蛋白酶活性具有显著影响,肠道和肝胰脏蛋白酶活性随着饲料蛋白水平提高呈显著增强(P<0.05)。饲料蛋白水平为50.33%时,肠道蛋白酶活性最高,达171.26U/mgPr,显著高于31.04%饲料蛋白组(P<0.05);40.89%和46.62%饲料蛋白组的肝胰脏蛋白酶活性分别为35.04U/mgPr和35.68U/mgPr,显著高于31.04%和35.51%组(P<0.05)。饲料蛋白水平对肠道和肝胰脏的淀粉酶与脂肪酶活性没有显著影响(P>0.05)。饲料中豆粕替代鱼粉对翘嘴红鲌肠道和肝胰脏的蛋白酶活性具有显著影响,肝胰脏和肠道的蛋白酶活性都随着豆粕替代量提高而显著降低(P<0.05)。豆粕替代量为40.5%时,肠道蛋白酶活性为133.0U/mgPr,显著低于对照组(P<0.05),27.0%大豆蛋白替代组的肝胰脏的蛋白酶活性为31.34U/mgPr,显著低于对照组(P<0.05)。肠道淀粉酶活性没有受到豆粕替代鱼粉的影响(P>0.05),但肝胰脏淀粉酶活性随着豆粕替代量的提高而增强(P<0.05)。肝胰脏和肠道的脂肪酶活性不受饲料中豆粕替代鱼粉的影响(P>0.05)。
