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首页> 外文期刊>ICES Journal of Marine Science >Vertical Movements Of 'escaped' Farmed Atlantic Salmon (salmo Salar L.)-a Simulation Study In A Western Norwegian Fjord
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Vertical Movements Of 'escaped' Farmed Atlantic Salmon (salmo Salar L.)-a Simulation Study In A Western Norwegian Fjord

机译：“逃逸”的养殖大西洋鲑鱼（salmo Salar L.）的垂直运动-在挪威西部峡湾的模拟研究

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摘要

To study the vertical distribution of fish that had been allowed to escape, farmed Atlantic salmon were tagged with acoustic tags equipped with depth sensors, and then released on five different dates in the course of a year from two fish farms in the Hardanger Fjord in western Norway. Release stimulated the fish to dive to deeper than 15 m during the first hours or days post-release, often down to 50-80 m. However, during the following 4 weeks, most of the escapees spent most of their time above the pycnocline at depths of 0-4 m. The fish were more widely distributed in the water column after release during winter, but still spent most of the time in the cold surface layers. There was a wide range in the vertical distribution of individual fish, and the proportion of detections below 14-m depth ranged from 0 to 90%. There was a significant diurnal cycle in all seasons except midsummer, when the fish were less abundant in the upper layer during daylight, especially on brighter days. The results suggest that salmon diving activity following escape may complicate the recapture of escaped fish at the farm site but that the subsequent tendency of most fish to stay near the surface, virtually irrespective of the time of year, may facilitate recapture.
机译：为了研究允许逃逸的鱼的垂直分布，在养殖的大西洋鲑鱼上贴上装有深度传感器的声学标签，然后在一年中的五个不同日期分别从美国西部的哈当厄尔峡湾的两个养鱼场释放挪威。释放刺激鱼在释放后的最初几个小时或几天内跳水到15 m以上，通常低至50-80 m。然而，在随后的4周中，大多数逃生者将大部分时间都花费在比多菌灵上方0-4 m的深度上。冬季释放后，鱼在水柱中分布更广泛，但大部分时间仍停留在寒冷的表层。单个鱼的垂直分布范围很广，深度小于14米的探测比例为0％至90％。除仲夏外，所有季节都有一个明显的昼夜周期，这是因为白天白天，特别是在晴天时，上层鱼的数量减少。结果表明，逃逸后的鲑鱼潜水活动可能会使在农场现场重新捕获逃逸的鱼类变得复杂，但实际上，无论一年中的何时，大多数鱼类随后停留在水面附近的趋势都可能有助于重新捕获。

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