Responses in spatial distribution of Barents Sea capelin to changes in stock size, ocean temperature and ice cover
Responses in spatial distribution of Barents Sea capelin to changes in stock size, ocean temperature and ice cover
复制标题
DOI：
10.1080/17451000.2013.775450
复制
发表时间：
2013-11-01
影响因子：
1.1
通讯作者：
Gjosaeter, Harald
中科院分区：
文献类型：
--
作者：
Ingvaldsen, Randi B.;Gjosaeter, Harald
使用 1972 年至 2010 年期间的数据，我们将巴伦支海毛鳞鱼分布的变化与种群规模、海洋温度和夏季可供扩散的区域联系起来。我们发现分布区域和库存规模之间存在很强的关系，这很可能是由于大量库存扩大了饲养区域以满足更高的食物需求所致。然而，近十年来，分布区域普遍扩大，高浓度区域北移，这与该时期巴伦支海北部观测到的高温和低冰盖有关。研究表明，海洋温度和冰盖决定了毛鳞鱼分布的大尺度条件，而种群规模则决定了毛鳞鱼如何利用可用区域。库存量变化 400 万吨或温度变化 1 摄氏度都会对分布产生类似的影响。
Using data for the period 1972-2010, we relate the variations in the Barents Sea capelin distribution to stock size, ocean temperatures and the area available for dispersal during summer. We find a strong relation between distribution area and stock size, which is most likely caused by a large stock extending the feeding area to meet the higher food demand. However, during the last decade there has been a general expansion of the distribution area and a northward shift of the high-concentration areas, which we relate to the high temperatures and low ice cover observed in the northern Barents Sea during the period. The study shows that ocean temperature and ice cover set the large-scale terms for the capelin distribution, while the stock size determines how capelin uses the available area. Changes of 4 million tonnes in stock size or 1 degrees C in temperature give comparable impacts on the distribution.