Hunter Ewan, Metcalfe Julian D, Reynolds John D
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory, Lowestoft, Suffolk NR33 0HT, UK.
Proc Biol Sci. 2003 Oct 22;270(1529):2097-103. doi: 10.1098/rspb.2003.2473.
Data from plaice, Pleuronectes platessa L., tagged with electronic data storage tags, were used to test whether these fishes exhibited migration route and spawning area fidelity in successive spawning seasons. Depth and temperature data were recorded for each fish over 365-512 days in the central North Sea and this information was used to reconstruct movements based on tidal locations. We discovered highly directed seasonal migrations from the winter spawning area south of a major topographical feature, Dogger Bank Tail End, to summer feeding grounds 250 km to the north in deep, cold, thermally stratified water. Our results show synchronous timing of migration, repeated pre- and post-spawning migration routes and 100% spawning area fidelity, including two individuals that returned to within 20 km of their previous season's spawning location. This is the first study to provide a complete reconstruction of annual migrations by individual fishes, showing strong homing behaviour along consistent migration routes.
对用电子数据存储标签标记的欧洲鲽(Pleuronectes platessa L.)的数据进行了分析,以测试这些鱼类在连续产卵季节是否表现出洄游路线和产卵区域忠诚度。在北海中部,对每条鱼进行了365 - 512天的深度和温度数据记录,并利用这些信息根据潮汐位置重建其洄游轨迹。我们发现了从一个主要地形特征——多格浅滩尾端以南的冬季产卵区,到北部250公里外寒冷、深层、有温度分层的夏季觅食地的高度定向季节性洄游。我们的研究结果显示了洄游时间的同步性、产卵前后重复的洄游路线以及100%的产卵区域忠诚度,其中包括两条回到距离上一季产卵地点20公里范围内的个体。这是第一项对单个鱼类的年度洄游进行完整重建的研究,显示出沿着一致洄游路线的强烈归巢行为。