Effects of Stocking Density on Growth Performance and Parameters of Pelteobagrus vachelli Juveniles
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摘要: 为探讨养殖密度对瓦氏黄颡鱼幼鱼生长性能、肌肉成分、血液生理生化指标的影响,选用初始体重为(25.23±0.09)g的瓦氏黄颡鱼幼鱼,分别设置G1、G2、G3、G4试验组,养殖密度分别为0.50、1.01、1.51、2.02 kg·m-3(即20、40、60、80尾·m-3),在循环水养殖系统中进行60 d的养殖试验。结果表明,幼鱼的终末体长、终末体重、特定生长率、肥满度随养殖密度增大而下降,饲料系数则呈上升趋势;G1组瓦氏黄颡鱼幼鱼终末体长、终末体重、特定生长率、肥满度、存活率显著高于G3组和G4组(P < 0.05),但G1、G2组鱼体肥满度、饲料系数及存活率无显著差异(P>0.05)。肌肉中蛋白质含量随养殖密度增加而上升,脂肪含量则呈下降趋势,G1组瓦氏黄颡鱼肌肉蛋白质含量显著低于其他处理组(P < 0.05),脂肪含量显著高于其他处理组(P < 0.05)。血液白蛋白、溶菌酶水平随养殖密度增高呈下降趋势(P < 0.05),G1组显著高于G3、G4组(P < 0.05);谷丙转氨酶、谷草转氨酶水平随养殖密度增高呈升高趋势(P < 0.05),G1、G2组显著低于G3、G4组(P < 0.05);在试验条件下,养殖密度对鱼体抗氧化能力影响不显著(P>0.05)。综合分析,在本试验条件下,体质量为(25.23±0.09)g的瓦氏黄颡鱼适宜放养密度约为1.01 kg·m-3,该结果可为工厂化养殖提供参考依据。Abstract: The purpose of this study was to investigate the effects of stocking density on growth, muscle composition and blood parameters of Pelteobagrus vachelli juveniles. A 60 day feeding trial was conducted to evaluate the effects of stocking density on growth, muscle composition and blood parameters of juvenile yellow catfish (Pelteobagrus vachelli). A total of 600 juvenile yellow catfish with an initial body weight of (25.23±0.09) g were randomly distributed into four different stocking density groups with 3 replicates per group of G1 (0.50 kg·m-3, 20 fish·m-3), G2 (1.01 kg·m-3, 40 fish·m-3), G3 (1.51 kg·m-3, 60 fish·m-3), G4 (2.02 kg·m-3, 80 fish·m-3). The results showed that the growth and feed coefficient of juvenile yellow catfish were effected significantly by stocking density (P < 0.05). Final body length, final body weight, specific growth rate and condition factor decreased with an increase in stocking density, whereas the feed coefficient showed the opposite tendency (P < 0.05). Final body length, final body weight, specific growth rate, condition factor and survive rate of fish in G1 were higher than those in G3 and G4 (P < 0.05), but the condition factor, feed coefficient and survive rate of G1 and G2 were with no significant difference(P>0.05).Muscle protein content increased significantly with the increase in stocking density, whereas muscle lipid content decreased significantly (P < 0.05). Muscle protein content of fish in G1 was lower than others, whereas the lipid content showed the opposite tendency (P < 0.05). Lower stocking density groups had higher albumin content and lysozyme activity in blood (P < 0.05), whereas glutamic-pyruvic transaminase and glutamic-oxalacetic transaminase activities showed the opposite tendency(P < 0.05). No significant difference was observed in blood total antioxidant capacity among all groups(P>0.05). In conclusion, 1.01 kg·m-3 was considered to be a suitable stocking density for juvenile yellow catfish with an initial body weight of (25.23±0.09) g.
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Key words:
- Pelteobagrus vachelli /
- stocking density /
- growth /
- muscle composition /
- biochemical parameter
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表 1 养殖密度对瓦氏黄颡鱼生长的影响
Table 1. Growth parameters of Pelteobagrus vachelli juvenile at different stocking densities
处理组 初始密度
/(kg·m-3)初始体重
/g终末体长
/cm终末体重
/g特定生产率
/(%·d-1)肥满度
/%饲料系数 存活率
/%G1 0.5 25.16±0.18 18.16±0.19a 60.88±1.10a 1.47±0.03a 1.02±0.02a 1.21±0.02c 96.67±2.89a G2 1.01 25.37±0.23 17.72±0.22b 54.38±0.94b 1.27±0.03b 0.98±0.05ab 1.22±0.04bc 95.00±2.50a G3 1.51 25.21±0.12 17.62±0.27b 52.31±1.37c 1.22±0.05c 0.96±0.03b 1.28±0.04ab 94.44±1.92b G4 2.02 25.19±0.17 17.58±0.13b 51.23±0.77c 1.18±0.02c 0.94±0.03b 1.30±0.03a 93.75±1.25b 注:同列数据后不同小写字母表示差异显著(P<0.05),表 2、3同。 表 2 养殖密度对瓦氏黄颡鱼肌肉组分的影响
Table 2. Effects of stocking density on the muscle composition of Pelteobagrus vachelli juvenile
处理组 水分含量
/%蛋白质含量
/%脂肪含量
/%灰分含量
/%G1 71.48±0.23 16.34±0.08b 9.48±0.04a 1.61±0.04 G2 71.73±0.37 16.70±0.09a 9.02±0.18b 1.60±0.02 G3 71.75±0.22 16.77±0.07a 8.96±0.05b 1.64±0.01 G4 71.52±0.10 16.79±0.11a 8.86±0.13b 1.65±0.04 表 3 养殖密度对瓦氏黄颡鱼血液生理指标的影响
Table 3. Blood biochemical parameters of Pelteobagrus vachelli juvenile under different stocking densities
处理组 总蛋白/
(g·L-1)白蛋白/
(g·L-1)碱性磷酸酶
/(U·L-1)酸性磷酸酶
/(U·L-1)溶菌酶/
(U·mL-1)过氧化氢酶/
(U·mL-1)总超氧化物歧化酶/
(U·mL-1)丙二醛/
(nmol·L-1)谷丙转氨酶
/(U·L-1)谷草转氨酶
/(U·L-1)G1 40.29±0.91 11.35±0.82a 29.96±2.06 24.98±0.89 344.34±18.40a 3.99±0.29 50.21±3.33 8.09±0.22 12.73±0.70c 20.77±2.60c G2 40.69±1.66 10.60±0.58ab 30.69±2.93 25.17±1.04 346.16±9.23a 3.91±0.20 50.70±3.80 8.03±0.21 12.81±0.85c 20.51±3.13c G3 40.70±1.40 10.15±0.60bc 29.38±3.00 25.45±0.87 299.13±12.43b 3.98±0.27 51.15±3.30 8.09±0.17 22.79±1.85b 27.57±3.42b G4 40.69±1.02 9.59±0.31c 29.29±2.84 25.49±1.54 255.05±11.52c 4.14±0.38 50.27±2.45 8.12±0.20 32.58±3.22a 32.25±2.64a -
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