Dietary supplemental effects of red seaweed Eucheuma denticulatum on growth performance, carcass composition and blood chemistry of juvenile Japanese flounder, Paralichthys olivaceus
Dietary supplemental effects of red seaweed Eucheuma denticulatum on growth performance, carcass composition and blood chemistry of juvenile Japanese flounder, Paralichthys olivaceus
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DOI：
10.1111/are.12211
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发表时间：
2015-03
影响因子：
2
通讯作者：
J. A. Ragaza;S. Koshio;R. Mamauag;M. Ishikawa;S. Yokoyama;Shiela S. Villamor
中科院分区：
文献类型：
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作者：
J. A. Ragaza;S. Koshio;R. Mamauag;M. Ishikawa;S. Yokoyama;Shiela S. Villamor
通过为期56天的饲养试验，研究了牙鲆幼鱼饲料中添加齿状锦鸡儿(EDP)的效果。以鱼粉为基础的阳性对照日粮(PC)和添加3%(D3%)、6%(D6%)和9%(D9%)EDP的鱼粉-大豆浓缩蛋白阴性对照日粮(NC)配制等氮和等脂试验日粮。试验饲料被分配到水族箱(12个鱼缸−-1，初始平均体重为0.42±0.01g)中。饲养试验结果表明，日粮中添加3%的EDP可显著提高仔猪的生长速度和饲料效率(P<；0.05)。然而，添加水平较高的饲料显著降低了鱼的生长和饲料效率(P<；0.05)。饲料中蛋白质、脂肪、干物质和灰分含量及其相应的营养保留值在所有日粮处理下均未发生显著变化。与对照组相比，添加EDP饲料的鱼背部肌肉中omega-3多不饱和脂肪酸的积累量更高(P<；0.05)。血液生化指标显示总胆固醇和甘油三酯水平有显著差异(P<；0.05)。这些结果表明，牙鲆能有效地利用EDP，并在3%的水平上能促进其最佳生长和饲料利用率。
A 56-day feeding trial was conducted to determine the effects of supplementing diets of juvenile Japanese flounder, Paralichthys olivaceus, with Eucheuma denticulatum (EDP). Isonitrogenous and isolipidic test diets were prepared using a fishmeal-based positive control diet (PC) and a fishmeal-soy protein concentrate negative control diet (NC) supplemented with 3 (D3%), 6 (D6%) and 9% (D9%) EDP. The test diets were assigned to tanks (12 fish tank−1, initial mean body weight of 0.42 ± 0.01 g) in triplicates. Results of the feeding trial indicated that growth rates and feed efficiency significantly improved (P < 0.05) when 3% EDP was supplemented in the diets. However, there was a significant reduction (P < 0.05) of growth and feed efficiency in fish fed diets with higher supplementation levels. Protein, lipid, dry matter and ash contents of carcass and their corresponding nutrient retention values were not markedly altered in all dietary treatments. Fish fed diets supplemented with EDP exhibited higher (P < 0.05) omega-3 polyunsaturated fatty acid accumulation in dorsal muscle when compared with those of fish fed NC. Blood chemical parameters showed significant differences (P < 0.05) in total cholesterol and triglyceride levels. These results suggest that EDP can be efficiently utilized by Japanese flounder and can promote best growth and feed utilization at a level of 3%.