Homing abilities of dolphinfish (Coryphaena hippurus) displaced from fish aggregating devices (FADs) determined using ultrasonic telemetry
Homing abilities of dolphinfish (Coryphaena hippurus) displaced from fish aggregating devices (FADs) determined using ultrasonic telemetry
复制标题
使用超声波遥测技术确定从鱼聚集装置 (FAD) 中转移出来的海豚鱼 (Coryphaena hippurus) 的归巢能力
DOI：
10.1051/alr:2008005
复制
发表时间：
2007
影响因子：
1.1
通讯作者：
S. Benhamou
中科院分区：
文献类型：
--
作者：
Charlotte Girard;L. Dagorn;M. Taquet;R. Aumeeruddy;C. Peignon;S. Benhamou
我们使用声学标签进行了位移实验，以研究海豚鱼 (Coryphaena hippurus) 在 FAD 周围的定向能力。使用连接到 FAD 的编码发射器和声学接收器被动监测 11 条鱼，而使用配备压力传感器的连续声学标签的船只则主动跟踪另外 7 条鱼。所有这 18 条海豚鱼都是在 FAD 附近捕获的，并在距离 FAD 70 至 1720 m 之间放生。 14 条鱼中有 5 条被转移到距离 FAD（我们的声学接收器的估计检测范围，在我们的实验过程中定义目标区域）超过 360 m 的地方返回到目标区域。当一条个体在距离FAD 1600 m处放生后成功返回目标区域时，在此距离放生的鱼的返回率明显高于随机移动的预期，但许多中等距离放生的鱼向其他方向移动。根据对返回分数的详细统计分析，我们估计海豚鱼能够在至少 820 m 处向 FAD 区域定位。讨论了我们对目标区域的定义与 FAD 周围海豚鱼的关联区域之间的联系，以及压力和动机对观察到的回报率的影响。应该进行更多的实验来改进这个初步估计。还应该设计具体的实验来更准确地确定鱼在 FAD 周围的关联范围以及它们朝向 FAD 的动机。
We conducted displacement experiments using acoustic tags to study the orientation abilities of dolphinfish (Coryphaena hippurus) around FADs. Eleven fish were passively monitored using coded transmitters and acoustic receivers attached to FADs, while seven others were actively tracked with a vessel using continuous acoustic tags equipped with pressure sensors. All these 18 dolphinfish were captured close to a FAD and released between 70 and 1720 m from it. Five fish out of the 14 that were displaced at more than 360 m from a FAD (estimated detection range of our acoustic receivers, defining the target area during our experiment) returned to the target area. With one individual successfully returning to the target area after having been released at 1600 m from the FAD, the rate of return of fish released up to this distance was significantly higher than expected if they were moving at random, but many fish released at intermediate distances moved in other directions. Based on detailed statistical analysis of the return score, we estimated that dolphinfish are able to orientate towards a FAD area from at least 820 m. The connection between our definition of the target area and the association area of dolphinfish around a FAD is discussed, as well as the impact of stress and motivation in the rates of return observed. More experiments should be conducted to improve this first estimate. Specific experiments should also be designed to more accurately determine the association range of fish around FADs and their motivation to orientate towards FADs.