Post-breeding season distribution of black-footed and Laysan albatrosses satellite-tagged in Alaska: Inter-specific differences in spatial overlap with North Pacific fisheries
Post-breeding season distribution of black-footed and Laysan albatrosses satellite-tagged in Alaska: Inter-specific differences in spatial overlap with North Pacific fisheries
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DOI：
10.1016/j.biocon.2008.12.007
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发表时间：
2009-04-01
影响因子：
5.9
通讯作者：
Balogh, Gregory R.
中科院分区：
文献类型：
--
作者：
Fischer, Karen N.;Suryan, Robert M.;Balogh, Gregory R.
我们整合了来自黑脚信天翁（Phoebastria nigripes; n = 7）和在阿拉斯加捕获的Laysan信天翁（Phoebastria immutabilis; n = 18）的卫星跟踪数据，以及北太平洋商业渔业的捕捞努力量和分布数据，以评估潜在的风险。信天翁在阿拉斯加阿留申群岛中部的海上进行了卫星标记，并在2005年7月至2006年10月的繁殖期后进行了跟踪。在阿拉斯加沃茨，捕捞活动几乎完全发生在大陆架和斜坡沃茨。黑脚信天翁，最经常光顾的陆架坡沃茨，潜在的渔业相互作用是最大的sablefish（Anoplopoma fimbria）延绳钓和盆栽渔业和太平洋大比目鱼（Hippoglossus stenolepsis）延绳钓渔业。相比之下，Laysan信天翁在大陆架和陆坡以外的海洋沃茨上花费的时间与黑脚信天翁一样多，因此与阿拉斯加的渔业重叠较少。从区域上看，Laysan信天翁与阿留申群岛西部的Atka鲭鱼（Pleruogrammus paclitus）拖网渔业和阿留申群岛中部的鲑鱼盆渔业的潜在渔业相互作用最大。黑脚信天翁的活动范围比Laysan信天翁更远，超出阿拉斯加沃茨，与加拿大西海岸渔业和亚北极过渡区的中上层延绳钓渔业重叠; Laysan信天翁仍然位于这些中上层渔业的北部。由于海洋分布和栖息地利用的种间差异，与黑脚信天翁繁殖后分布的渔业重叠大于Laysan信天翁，突出了种间差异的潜在脆弱性兼捕和渔业对种群水平影响的风险。(C)2008爱思唯尔有限公司保留所有权利。
We integrated satellite-tracking data from black-footed albatrosses (Phoebastria nigripes; n = 7) and Laysan albatrosses captured in Alaska (Phoebastria immutabilis; n = 18) with data on fishing effort and distribution from commercial fisheries in the North Pacific in order to assess potential risk from bycatch. Albatrosses were satellite-tagged at-sea in the Central Aleutian Islands, Alaska, and tracked during the post-breeding season, July-October 2005 and 2006. In Alaskan waters, fishing effort occurred almost exclusively within continental shelf and slope waters. Potential fishery interaction for black-footed albatrosses, which most often frequented shelf-slope waters, was greatest with sablefish (Anoplopoma fimbria) longline and pot fisheries and with the Pacific halibut (Hippoglossus stenolepsis) longline fishery. In contrast, Laysan albatrosses spent as much time over oceanic waters beyond the continental shelf and slope, thereby overlapping less with fisheries in Alaska than black-footed albatrosses. Regionally, Laysan albatrosses had the greatest potential fishery interaction with the Atka mackerel (Pleruogrammus monopterygius) trawl fishery in the Western Aleutian Islands and the sablefish pot fishery in the Central Aleutian islands. Black-footed albatrosses ranged further beyond Alaskan waters than Laysan albatrosses, overlapping west coast Canada fisheries and pelagic longline fisheries in the subarctic transition domain; Laysan albatrosses remained north of these pelagic fisheries. Due to inter-specific differences in oceanic distribution and habitat use, the overlap of fisheries with the post-breeding distribution of black-footed albatrosses is greater than that for Laysan albatrosses, highlighting inter-specific differences in potential vulnerability to bycatch and risk of population-level impacts from fisheries. (C) 2008 Elsevier Ltd. All rights reserved.