The home range and behaviour of yellow‐stage European eel Anguilla anguilla in an estuarine environment
The home range and behaviour of yellow‐stage European eel Anguilla anguilla in an estuarine environment
复制标题
河口环境中黄期欧洲鳗鲡的活动范围和行为
DOI：
10.1002/aqc.2380
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发表时间：
2014
影响因子：
2.4
通讯作者：
P. I. Davison
中科院分区：
文献类型：
--
作者：
A. Walker;M. Godard;P. I. Davison
7月至12月，使用声学发射机和固定水听器阵列，研究了弗罗姆河和皮德尔河潮汐沃茨内的黄色阶段欧洲鳗鲡（Anguilla anguilla）和邻近的普尔港河口（英国多塞特）的行为模式。
点到点的措施的范围在630米和4150米之间变化，鳗鱼的大小和范围之间没有关系。八条鳗鱼显示了重复的线路，在几个小时内旅行了440米到5060米的距离。
活动一般是，但不完全是，夜间，与开始和结束时间密切相关的日落和日出，分别。
移动方向和平均地速都不受潮汐流向的影响，水温的季节性下降似乎也不影响行为。
这些结果在定期，夜间运动的距离提供了宝贵的见解的空间和时间分布的黄鳗鱼在河口环境，这可以帮助设计的调查方案的范围内部署渔具和他们应该捕鱼的夜晚数。这些调查方案是迫切需要的，以估计鳗鱼产量从盐水环境中的国家鳗鱼管理计划，并随后实施有效的保护措施。
强烈的影响，光制度对鳗鱼的行为模式指向控制人工照明（光污染）是一个重要的鳗鱼保护措施，在这种环境中，至少。
版权所有© 2013皇冠版权所有。
The behaviour patterns of yellow-stage European eels Anguilla anguilla within the tidal waters of the rivers Frome and Piddle, and the neighbouring Poole Harbour estuary (Dorset, England) were examined from July to December using acoustic transmitters and a fixed hydrophone array.
Point-to-point measures of range varied between 630 m and 4150 m, with no relationship between eel size and range. Eight eels displayed repeated circuits, travelling distances of 440 m to 5060 m over a few hours.
Activity was generally, but not exclusively, nocturnal, with the start and end times closely associated with sunset and sunrise, respectively.
Neither direction of travel nor average ground speed was influenced by tidal flow direction, and seasonal declines in water temperature did not appear to influence behaviours.
These results on distance travelled during regular, nocturnal movements provide valuable insights into the spatial and temporal distribution of yellow eels in an estuarine environment, which can aid the design of survey programmes in terms of the range over which to deploy fishing gears and the number of nights they should be fished. These survey programmes are urgently required to estimate eel production from saline environments for national Eel Management Plans, and the subsequent implementation of effective conservation measures.
The strong influence of light regime on the behaviour patterns of eels points towards control of artificial illumination (light pollution) being an important eel conservation measure in this environment, at least.
Copyright © 2013 Crown copyright.