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| 养殖密度对循环水系统中大菱鲆生长和蛋白质代谢的影响 |
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韩 岑1,2, 雷霁霖1,2, 刘宝良2, 贾 睿2, 姜志强1, 赵奎峰3, 王国文3
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1.大连海洋大学 农业部北方海水增养殖重点实验室;2.中国水产科学研究院 黄海水产研究所, 农业部海洋渔业可持续发展重点实验室, 青岛市海水鱼类种子工程与生物技术重点实验室;3.山东东方海洋科技股份有限公司
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| 摘要: |
| 在工厂化循环水养殖系统中, 将初始体质量为186 g±2.0 g的大菱鲆(Scophthalmus maximus)放养于低(9.4 kg/m2±0.2 kg/m2)、中(13.6 kg/m2±0.8 kg/m2)、高(19.1 kg/m2±1.3 kg/m2)3个养殖密度, 以研究不同养殖密度对大菱鲆生长、消化酶和蛋白质代谢的影响。养殖120 d后, 低、中、高试验组养殖密度分别增长至26.1 kg/m2± 1.2 kg/m2、38.2 kg/m2±2.5 kg/m2、52.3 kg/m2±3.6 kg/m2。结果表明: 低密度组和中密度组中大菱鲆增质量率、特定生长率、肥满度和蛋白质效率均显著(P<0.05)高于高密度组;而饲料系数显著低于高密度组(P<0.05)。低密度组和中密度组大菱鲆总蛋白酶和淀粉酶活力显著低于高密度组(P<0.05); 但脂肪酶活力在3个密度组之间无显著性差异。与低密度组相比, 高密度组显著提高了谷氨酸脱氢酶活力, 同时降低了谷草转氨酶和亮氨酸氨肽酶活力(P<0.05), 而对谷丙转氨酶活力无任何影响。综上所述, 在工厂化循环水系统中, 增加养殖密度能提高养殖的产量, 但过高的养殖密度会对大菱鲆生长、消化酶活力以及蛋白质代谢产生不利的影响。 |
| 关键词: 循环水系统 大菱鲆(Scophthalmus maximus) 养殖密度 生长 蛋白质代谢 |
| DOI：10.11759/hykx 20160112003 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(31402315、31240012); 农业部北方海水增养殖重点实验室开放课题项目(2014-MSENC-KF-02); 现代农业国家鲆鲽类产业体系资助项目(CARS-50-G10); 江苏省重点研发计划资助项目(BE2015328) |
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| Effect of stocking density on growth and protein metabolism of Scophthalmus maximus in a recirculating aquaculture system |
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HAN Cen,LEI Ji-lin,LIU Bao-liang,JIA Rui,JIANG Zhi-qiang,ZHAO Kui-feng,WANG Guo-wen
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| Abstract: |
| The aim of this study was to evaluate the effect of stocking density on growth, digestive enzyme activity, and protein metabolism of turbot (Scophthalmus maximus L.) with an initial body weight of (186 ± 2.0) g in a recirculating aquaculture system (RAS). In this experiment, turbot were reared at three different initial densities (low 9.4 kg/m2 ± 0.2 kg/m2, medium 13.6 kg/m2 ± 0.8 kg/m2, and high 19.1 kg/m2 ± 1.3 kg/m2) for 120 days. Final densities were 26.1 kg/m2 ± 1.2 kg/m2, 38.2 kg/m2 ± 2.5 kg/m2, and 52.3 kg/m2 ± 3.6 kg/m2, respectively. The result shows that fish held at the highest density showed a lower (P < 0.05) weight gain rate (WGR), specific growth rate (SGR), condition factor (CF), and protein efficiency ratio (PER) at the conclusion of the study than fish held at lower densities, but the highest density group had a higher (P < 0.05) feed coefficient rate (FCR) than fish held at lower densities. The total protease (TMP) and amylase (AMS) activities of the highest density group were significantly higher (P < 0.05) than those of the lower density groups, and the three groups did not differ significantly in lipase (LPS) activities. As stocking densities increased, the glutamate dehydrogenase (GDH) activities were significantly increased and the aspartate transaminase (AST) and leucine aminopeptidase (LAP) activities were significantly decreased, but the alanine transaminase (ALT) activities were not significantly affected by density. We conclude that increasing stocking density can improve production in a RAS, but high stocking density may impact growth, digestive enzyme activity, and protein metabolism. |
| Key words: Recirculating aquaculture system Scophthalmus maximus L. stocking density growth protein metabolism |