5种鱼感应流速比较分析
Comparison of Induction Velocities for Five Fish Species
投稿时间:2017-03-06  修订日期:2018-01-24
中文关键词:感应流速          蒙古鲌
英文关键词:induction velocity  Cyprinus carpio  Carassius auratus  Hypophthalmichthys molitrix  Aristichthys nobilis  Culter mongolicus mongolicus
基金项目:
作者单位E-mail
王晓臣 陕西格林维泽环保技术服务有限公司西安710075 wangxiaochen1985@126.com 
邢娟娟 陕西格林维泽环保技术服务有限公司西安710075 xjj8667@163.com 
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中文摘要:
      研究鱼类感应流速的差异性以及鱼类感应流速的决定因子,为过鱼设施的设计提供基础数据支持。鲤、鲫、鲢、鳙及蒙古鲌体长分别为(24.46±5.9)、(13.66±4.7)、(32.73±3.7)、(30.47±1.7)、(23.51±3.1)cm,试验装置采用自行设计的螺旋桨式游泳能力测试水槽,试验用水均为经过沉淀处理的山涧流水,水温(21?1)℃,溶解氧(6.5?0.5)mg/L。利用流速与电动机调节频率的关系式计算试验对象的感应流速,采用双变量相关分析检验5种鱼感应流速与各自体长之间的关系,采用多个独立样本的非参数检验分析5种鱼之间的感应流速差异。结果表明鲤、鲫、鲢、鳙以及蒙古鲌的绝对感应流速分别是(3.55±2.43)、(2.408±2.00)、(4.605±2.575)、(2.033±1.019)和(1.843±1.205)cm/s,相对感应流速分别是(0.147±0.097)、(0.182±0.166)、(0.142±0.078)、(0.067±0.034)和(0.08±0.054)BL/s;鱼类的体长与绝对感应流速不存在相关关系;相对感应流速更能准备表达鱼类对水流变化的敏感度;不同种鱼之间的感应流速差异极显著(P<0.01)。
英文摘要:
      The variation in induction velocities among different fish species, and the related driving factors, was investigated to provide base data to support fish passage design. Here, the induction velocity of five fish species (Cyprinus carpio, Carassius auratus, Hypophthalmichthys molitrix, Aristichthys nobilis and Culter mongolicus mongolicus) were measured and compared. The objective was to supplement data on the rheotaxis characteristics of the species investigated. Hypophthalmichthys molitrix and Aristichthys nobilis were collected for testing from a fishing ground, located in Hanzhong City, Shannxi Province, and the Cyprinus carpio, Carassius auratus and Culter mongolicus mongolicus were wild and collected from Hanjiang River. Body lengths(cm) of the test fish were, respectively (32.73±3.7), (30.47±1.7), (24.46±5.9), (13.66±4.7), and (23.51±3.1). Before testing, all fish were acclimated for 3 hr in the aquarium with water continuously recycled and aerated. The experiment was carried out in custom made test chamber with a motor-driven propeller. Test water was taken from a mountain stream and testing was carried out at (21?1) oC,with a DO of (6.5?0.5) mg/L. Flow velocity in the test chamber was controlled by calibrating the velocity to motor speed (Hz). The flow velocity that induced swimming (induction velocity) was then determined by observing the fish as flow velocity in the test chamber was increased. Bivariate correlation analysis was used to analyze the relationship between the induction velocity and body length for each of the five fish species, and the independent sample Kruskal-Wallis test was used to analyze the difference of induction velocity between the five fish species. Results show that the absolute induction velocities (cm?s-1) of Cyprinus carpio, Carassius auratus, Hypophthalmichthys molitrix, Aristichthys nobilis and Culter mongolicus mongolicus were, respectively, (3.55±2.43), (2.408±2.00), (4.605±2.575), (2.033±1.019) and (1.843±1.205) m?s-1, and the relative induction velocities(BL?s-1) were (0.147±0.097), (0.182±0.166), (0.142±0.07), (0.067±0.034), and (0.08±0.054). The absolute induction velocity for the five fish species did not correlate with body length, so relative induction velocity is a more precise indicator of the response of fish to change in water velocity. The induction velocities of the five species were significantly different (P<0.01). Of the five fish species, Aristichthys nobilis was the most sensitive species to the variation of water flow, followed by Culter mongolicus mongolicus, Hypophthalmichthys molitrix, Cyprinus carpio and Carassius auratus, consistent with expected habitat adaptations. There was no significant difference in the absolute induction velocity between Aristichthys nobilis and Culter mongolicus mongolicus or between Hypophthalmichthys molitrix, Cyprinus carpio and Carassius auratus, but significant differences were observed in the absolute induction velocity among the two groups. The induction velocity is a key parameter for the design of fish passages and, according to our research, the different induction velocities of target fishes should be considered in fish passage design.
王晓臣,邢娟娟.2018.5种鱼感应流速比较分析[J].水生态学杂志,39(2):77-81.
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