论文标题
确定海上与世界各地渔业对比的伴侣
Identifying partners at sea on contrasting fisheries around the world
论文作者
论文摘要
Here we present an approach to identify partners at sea based on fishing track analysis, and describe this behaviour in six different fleets: 1) pelagic pair trawlers, 2) large bottom otter trawlers, 3) small bottom otter trawlers, 4) mid-water otter trawlers, all operating in the North-East Atlantic Ocean, 5) anchovy purse-seiners in the South-East Pacific Ocean, and 6) tuna purse-seiners in the Western印度洋。已知这种行为存在于上层对拖网渔船中。由于这些船只需要成对进行捕鱼操作，因此实际上，其中一些船只决定在整个钓鱼旅行中一起移动，而另一些人只能进行一段时间的旅行。为了确定海上的伴侣，我们使用了基于联合运动指标和高斯混合模型的启发式方法。这些型号首先安装在上层拖网拖网上，然后在其他舰队上使用。在所有这些渔业中，只有金枪鱼藏书人没有在海上呈现伴侣。然后，我们分析了船舶规模的连接并确定了独家合作伙伴。这项工作表明，至少在世界各地的渔业中，至少有集体策略。
Here we present an approach to identify partners at sea based on fishing track analysis, and describe this behaviour in six different fleets: 1) pelagic pair trawlers, 2) large bottom otter trawlers, 3) small bottom otter trawlers, 4) mid-water otter trawlers, all operating in the North-East Atlantic Ocean, 5) anchovy purse-seiners in the South-East Pacific Ocean, and 6) tuna purse-seiners in the Western Indian Ocean. This type of behaviour is known to exist within pelagic pair trawlers. Since these vessels need to be in pairs for their fishing operations, in practice some of them decide to move together throughout their whole fishing trips, and others for only a segment of their trips. To identify partners at sea, we used a heuristic approach based on joint-movement metrics and Gaussian mixture models. The models were first fitted on the pelagic pair trawlers and then used on the other fleets. From all of these fisheries, only the tuna purse-seiners did not present partners at sea. We then analysed the connections at the scale of vessels and identified exclusive partners. This work shows that there are collective tactics at least at a pairwise level in diverse fisheries in the world.
