Changes and trends in the demersal fish community of the Flemish Cap, Northwest Atlantic, in the period 1988–2008
Changes and trends in the demersal fish community of the Flemish Cap, Northwest Atlantic, in the period 1988–2008
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1988-2008 年西北大西洋弗拉芒角底层鱼类群落的变化和趋势
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
F. Saborido
中科院分区：
文献类型：
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作者：
A. Pérez;M. Koen‐Alonso;F. Saborido
自1950年代以来一直在捕捞佛兰芒帽鱼群落（西北大西洋渔业组织3M区），据报告，自1980年代后期以来，其最重要的商业鱼种的生物量和丰度发生了重大变化。报告还描述了海帽海洋学条件的变化，气候时冷时热。这项工作利用动态因素分析，审查了主要底栖物种生物量水平随时间变化的共同趋势，并探讨了“偶发物种”的出现与温度条件的关系。总体而言，商业和非商业物种的群落结构发生了重大变化。确定了物种之间的共同趋势，总体捕捞压力、环境条件（以北大西洋涛动移动平均数表示）和捕食压力（以食鱼鱼类丰度表示）成为时间动态的重要驱动因素。NAO对大多数物种的影响与它们的温度偏好一致。对于偶尔出现的物种，其出现模式似乎也与温度状况的变化有关。
The Flemish Cap fish community (NAFO Division 3M) has been fished since the 1950s, and major changes in the biomass and abundance of its most important commercial species have been reported since the late 1980s. Variations in oceanographic conditions at the Cap, with alternating periods of cold and warm weather, have also been described. This work examines the existence of common trends in the biomass levels of the main demersal species over time using dynamic factor analysis, and the occurrence of “occasional species” was explored in relation to temperature conditions. Overall, there have been significant changes in community structure involving both commercial and non-commercial species. Common trends among species were identified and overall fishing pressure, environmental conditions (represented by a moving average of the North Atlantic Oscillation, NAO), and predation pressure (represented by the abundance of piscivorous fish) emerged as important drivers of the temporal dynamics. The NAO influence in the dynamics of most species was in agreement with their temperature preference. For occasional species, their pattern of occurrence appears also to be linked to changes in temperature regimes.