The restoration on Atlantic salmon [Salmo salar L.] in Poland
The restoration on Atlantic salmon [Salmo salar L.] in Poland
复制标题
波兰大西洋鲑鱼 [Salmo salar L.] 的恢复
作者：
R. Bartel
波兰仅存的鲑鱼种群在20世纪80年代中期灭绝。波兰的鲑鱼恢复计划以道加瓦鲑鱼为基础，第一批有眼道加瓦鲑鱼卵于1985年进口到波兰，并在随后的几年中继续进口。产卵鱼在格但斯克湾的网箱中饲养。自1994年以来，鲑鱼幼鱼被释放到波美拉尼亚河和维斯瓦河。1994年至1999年期间，释放了1，644，936只鲑鱼小鲑鱼，其中63，602只被标记。总的来说，标记标本的回收率很低，许多实验中根本没有回收。最高回收率为4.5%。有标记的鲑鱼在整个波罗的海迁徙，但捕获量最高的集中在博恩霍尔姆附近的格但斯克湾和芬兰湾。在第一个冬天，标记的鲑鱼达到平均长度为62.9厘米，平均重量为2.9公斤，在第二个冬天，这些数字分别为76.1厘米和5.3公斤，在第三个冬天，他们分别为90.7厘米和7.6公斤。
The last remaining salmon population in Poland went extinct in the mid 1980s. The salmon restoration program in Poland in based on Daugava salmon, and the first eyed Daugava salmon eggs were imported to Poland in 1985, and they continued to be imported in subsequent years. Spawners were reared in net cages in the Gulf of Gdañsk. Salmon smolts have been released into Pomeranian rivers and the Vistula River since 1994. Between 1994 and 1999, 1,644,936 salmon smolts were released, of which 63,602 were tagged. Overall, there was a low recovery rate of tagged specimens, and from many experiments there were no recoveries at all. The highest recovery rate was 4.5%. Tagged salmon migrated throughout the Baltic Sea, but the highest concentration of catches were in the Gulf of Gdañsk, near Bornholm and in the Gulf of Finland. In the first winter, the tagged salmon attained an average length of 62.9 cm and an average weight of 2.9 kg, in the second winter theses figures were 76.1 cm and 5.3 kg, and in the third they were 90.7 cm and 7.6 kg.