Rearing in a distorted magnetic field disrupts the 'map sense' of juvenile steelhead trout
Rearing in a distorted magnetic field disrupts the 'map sense' of juvenile steelhead trout
复制标题
DOI：
10.1098/rsbl.2014.0169
复制
发表时间：
2014-06-01
期刊：
影响因子：
3.3
通讯作者：
Noakes, David L. G.
中科院分区：
文献类型：
--
作者：
Putman, Nathan F.;Meinke, Amanda M.;Noakes, David L. G.
我们使用模拟的磁场位移来测试在其海洋范围的最北端和最南端边界存在的磁场中，钢头鲑幼鱼(Oncorhynchus MykISS)的取向偏好。在自然磁场条件下饲养的鱼通过朝向相反的方向而区分这两个领域，其头部将把鱼引向海洋觅食地。然而，在空间扭曲的磁场中饲养的鱼无法区分实验场，并随机定位。由于与水产养殖基础设施相关的磁场扭曲，养鱼所处的不均匀磁场可能是许多孵化场鱼类所遇到的典型磁场。鉴于我们观察到的航行能力下降可能会对海洋生存、寻的能力和孵化效率产生负面影响，我们建议进一步研究在非自然磁场中饲养鲑鱼的影响。
We used simulated magnetic displacements to test orientation preferences of juvenile steelhead trout (Oncorhynchus mykiss) exposed to magnetic fields existing at the northernmost and southernmost boundaries of their oceanic range. Fish reared in natural magnetic conditions distinguished between these two fields by orienting in opposite directions, with headings that would lead fish towards marine foraging grounds. However, fish reared in a spatially distorted magnetic field failed to distinguish between the experimental fields and were randomly oriented. The non-uniform field in which fish were reared is probably typical of fields that many hatchery fish encounter due to magnetic distortions associated with the infrastructure of aquaculture. Given that the reduced navigational abilities we observed could negatively influence marine survival, homing ability and hatchery efficiency, we recommend further study on the implications of rearing salmonids in unnatural magnetic fields.