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| 中华鳖Trionyx sinensis (Wiegmann)对泥鳅Misgurnus anguillicaudatus (Cantor)幼鱼的捕食效应 |
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袁向阳,邹李昶,申屠琰,朱卫东,王志铮
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浙江海洋学院 舟山,浙江海洋学院 舟山,余姚市水产技术推广中心 宁波,余姚市水产技术推广中心 宁波,浙江海洋学院 舟山
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| 摘要: |
| 以规格6m × 4m × 1.2m的室内水泥池为实验单元, A[(37.53 ± 7.72)mm]、B[(63.13 ± 12.95)mm]肛长组泥鳅幼鱼为猎物, 采用捕食者-猎物间捕食效应研究方法, 研究了中华鳖对泥鳅幼鱼的捕食效应。结果表明: (1) 中华鳖捕食泥鳅幼鱼的时段主要集中于00:00—4:00, 其对A肛长组泥鳅幼鱼所具的捕食选择性与A、B肛长组间初始数量的配置比例无关; (2) 中华鳖捕食泥鳅幼鱼的功能反应属Holling-Ⅱ型, 其对A、B肛长组泥鳅幼鱼的理论最大捕食量分别为16.13ind/d和9.06ind/d; (3) 中华鳖对A、B肛长组泥鳅幼鱼的种内干扰模型可分别由各自的指数方程表达，用来描述实验鱼初始数量、实验期间实验鱼被捕食数量以及中华鳖个数等参数的统计关系, 并指导确定合理的中华鳖和泥鳅的初始放养数量。 |
| 关键词: 中华鳖 泥鳅幼鱼 肛长 捕食作用 |
| DOI：10.11693/hyhz20140100016 |
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| 基金项目:国家科技部星火计划项目, 2010GA701077号; 宁波市农业领域科技重大攻关择优委托项目, 2012C10032号。 |
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| PREDATION HABIT OF TRIONYX SINENSIS ON JUVENILE MISGURNUS ANGUILLICAUDATUS |
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YUAN Xiang-Yang,Zou Lichang,SHEN Tu-Yan,ZHU Wei-Dong and WANG Zhi-Zheng
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Zhejiang Ocean University,Zhoushan,Zhejiang Ocean University,Zhoushan,Fishery Technology Extension Center of Yuyao,Ningbo,Fishery Technology Extension Center of Yuyao,Ningbo,Zhejiang Ocean University,Zhoushan
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| Abstract: |
| A method concerning was used to study the predatory efficiencies of Trionyx sinensis (the Chinese softshell turtle) juvenile Misgurnus anguillicaudatus (the pond loach, dojo loach), we studied the predation-pray relationship in two groups in snout-vent length at A [(37.53±7.72)mm] and B [(63.13±12.95)mm] of the juveniles cultured in indoor cement tanks (6m×4m×1.2m). The results show that: (1) The hunting time of T. sinensis concentrated in 00:00 to 4:00, and its preferential predation on M. anguillicaudatus in group A has no relationship to the initial proportion of the juveniles from A and B groups. (2) The type of predatory functional response of T. sinensis to M. anguillicaudatus is of Holling-Ⅱ model, and the theoretical maximal preying quantity were 16.13 (Group A) and 9.06 ind (Group B). (3) The intraspecific interference and interspecific interference models could be expressed in exponential equations for each group case to describe statistically the relationships between turtle and fish of different groups, involving parameters of the number of fish initially fed, number of the fish preyed during the experiment, and number of the turtle farmed. These models or equations can be used to determine best economic practice and provide guidance for the maximum profit to favor turtle farmers. |
| Key words: Trionyx sinensis juvenile Misgurnus anguillicaudatus snout-vent length predation efficiency |