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    题名 作者 年代 出处 被引量
1Effects of Dietary Protein Level on Growth and Utilization of Protein and Energy by Juvenile Mangrove Red Snapper(Lutjanus argentimaculatus)显示文摘A feeding trial was conducted in a recirculating water system to investigate the effects of dietary protein levels on growth, feed utilization, hepatosomatic index and liver lipid deposition of juvenile red snapper, Lutjanus argentimaculatus (average initial wet weight 8.0±0.39g and total length 3.14±0.3cm). In the experiment, six fishmeal-based diets were formulated to contain various protein levels (20% to 45% in 5% increments), with dietary energy ranging from 2210.7kJ 100g to 2 250.2 kJ 100 g dry matter. The protein to energy ratios of diets ranged from 8.58 mg protein kJ-1 to 20.03 mg protein kJ-1. Diets were fed for 90d to triplicate groups of fish stocked in 0.128 m3 seawater tanks, 25 individuals each. The daily ration of 2% wet body weight was offered to the fish thrice a day. The fish at the end of the study had more than ten-fold (77.0g) in- crease in weight compared to the initial (8.0g). Fish fed diets of 40% and 45% protein produced significantly (P<0.05) higher weight gain of 77.2g and 76.5 g, and specific growth rate (SGR) of 2.65% and 2.62% than those of 67.0 g and 68.3 g, and 2.49% and 2.51% of the other diets. The broken-line regression of SGR against dietary protein level yielded an optimum dietary protein requirement of 42.6% (Y = - 1.6295 + 0.1114 AT2, P<0.05). Survival remained 100% among groups. Feed conversion ratio decreased from 0.45 for fish fed 20% dietary protein to 0.35 for fish fed 45% dietary protein. Nitrogen in- take increased with an increase in dietary protein, which in turn resulted in an increase in nitrogen gain of fish whole body. Fish fed 40% and 45% protein diets showed higher (P<0.05) nitrogen gain (0.27g and 0.26g) than those (0.23g and 025g) fed all other diets. Gross energy intake (GEI) in fish fed 45% protein was lower (600.67kJ) than that (607.97kJ) of 40% protein diet, though the differences were not statistically significant (P>0.05); GEI ranging from 677.31 kJ to 663.20 kJ at remaining four diets (20% to 35% protein) did not appear to differ significantly (P>0.05). The highest energy gain of 518.33 kJ was obtained with fish fed 40% protein, resulting in the highest energy retention efficiency of 85.26%. The hep- atosomatic index of fish fed diets of 20%, 25%, 30% and 35% protein were significantly (P<0.05) higher (2.09% to 2.57%) than those (1.44% and 1.41%) of fish fed diets containing 40% and 45% protein. Liver lipid contents decreased from 8.72% to 7.0% in fish fed dietary protein of 20% to 45% in 5% increments. Results suggest that the diet containing 40% to 42.6% protein with a P/E ratio of 17.6mg protein kJ-1 is required for good growth of L. argentimaculatus weighing between 8.0 g and 85.2 g under the culture conditions of the present study.GhulamAbbas KhalidJamil RukhsanaAkhtar LinHong 2005Journal of Ocean University of China2005,4,1:3
2养殖和海捕对虾加热后蛋白特性变化的比较研究显示文摘从生物化学和物理学两个方面比较了养殖对虾和海捕对虾肌动球蛋白的特性,研究了加热对蛋白的影响。结果表明:加热后两种对虾蛋白质的溶解度和Ca2+ATPase活性随温度的升高而下降,Mg2+ATPase活性的变化与Ca2+ATPase的稍有不同。总巯基数从40℃开始略有下降,未结合巯基数先升后降。疏水性随温度升高而增大。ATP感度在常温时几乎没有变化,而35℃后有明显下降。所有指标的比较均说明,对虾肌动球蛋白对热反应强烈的温度始于30~40℃,且养殖对虾的热稳定性更差。林洪 姜凤英 KhalidJamil 薛长湖 李兆杰 陈修白 楼伟风 1998水产学报1998,22,2:2
3Salinity Tolerance and Growth Response of Juvenile Oreochromis mossambicus at Different Salinity Levels显示文摘Juveniles of Oreochromis mossambicus with initial wet weights of 0.0382±0.0859 g and initial total lengths of 0.735 ±1.425 cm were tested for their salinity tolerance. The juveniles were subjected to five salinity levels for a period of seventy five days. These salinity levels correspond to the salinities found along the creek and in estuarine regions. Each set of experiments was conducted at a fifteen day intervals. The weight, length and survival rate were calculated. No mortality was observed at salinity levels 0, 5, 10 and 15, while the juveniles faced slight mortality at 20 in the same environmental conditions, including the diet. There was no significant difference in specific growth rate at all salinity levels. The juveniles of O. mossambicus could survive up to 20 salinity. These results suggest that this species can grow and be exploited commercially in brackish waters, rivers and estuarine regions.KhalidJamil MuhammadShoaib FaisalAmeer LINHong 2004Journal of Ocean University of China2004,3,1:0
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