为评价养殖模式和饵料对养殖大黄鱼品质的影响,以野生大黄鱼为参照,对养殖大黄鱼(筏式小网箱冰鲜鱼饵料组R1、筏式小网箱饲料组R2、多通框网箱冰鲜鱼饵料组S1和多通框网箱饲料组S2)的体色、质构和营养成分进行了分析。结果显示:大黄鱼体表色泽分布具有一定的规律,尾部的内尾部各点,色差值相近,外尾部各点,色差值也相近,但内、外尾整体之间差异显著;腹部和背部体色均呈现中间深两边浅的分布;饲料中南极磷虾的加入可显著提升腹部黄度值。S组具有较优的质构和持水力以及更多的多不饱和脂肪酸和必需氨基酸,蛋白含量较高而粗脂肪较低;饲料组(R2、S2)的b*、脂肪酸和氨基酸等含量较高。结果表明,多通框网箱模式投喂饲料养殖大黄鱼的体色、肉质、营养品质较优,更接近野生鱼,可为优化养殖模式和研发高效环保型配合饲料提升大黄鱼品质提供依据。
This paper was conducted to evaluate the effects of aquaculture model and diet on the quality of cultured Pseudosciaena crocea. With wild P.crocea as reference, the differences of body color, texture and nutritional components of cultured P.crocea (group R1 fed with fresh bait in raft cage, group R2 fed with fish feed in raft cage, group S1 fed with fresh bait in multi-connected cage, group S2 fed with fish feed in multi-connected cage) were analyzed. The results showed that with a certain regularity, the inner and outer color of the rear tail were similar, but significantly different from the whole. The body color of the abdomen and the back showed a shallow distribution on the edge and dark in the middle. The addition of Antarctic krill in the feed could significantly increase the yellowness value in abdomen. Moreover, group S possessed better texture, higher water holding capacity, polyunsaturated fatty acids content, essential amino acids content, protein content and lower crude fat content, while the feed group (R2, S2) had higher content of b*, fatty acids and amino acids. In conclusion, the body color, fish quality and nutritional components of P.crocea fed in multi-connected cage are better than those of wild fish, which can provide a basis for optimizing the breeding model and developing a high-efficiency and environmental-friendly feed formula to improve the quality of P.crocea.
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