• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polar biology >The distribution and abundance of white-chinned petrels (Procellaria aequinoctialis) breeding at the sub-Antarctic Prince Edward Islands
【24h】

The distribution and abundance of white-chinned petrels (Procellaria aequinoctialis) breeding at the sub-Antarctic Prince Edward Islands

机译：在南极爱德华王子岛以南的白海燕（Procellaria aequinoctialis）繁殖的分布和丰度

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The white-chinned petrel {Procellaria aequinoctialis) is the seabird most often killed on longlines in the Southern Ocean and is listed as vulnerable to extinction. We estimated the population breeding at the Prince Edward Islands, the last breeding site for the nominate subspecies that lacks a recent population estimate. White-chinned petrel burrows are largely confined to deep, muddy soils, usually on slopes below 200 m, but locally up to 420 m. After correcting for count bias, Marion Island has an estimated 29,900 nests (95 % CI 27,700-32,400). Burrow occupancy rates at the start of the incubation period were 65 % during one-off surveys, but repeat surveys found that at least 73 % of burrows were occupied and 87 % of burrows showed signs of occupancy. This suggests that there were roughly 24,000 occupied nests on Marion Island (95 % CI 20,000-28,000). A more cursory survey on Prince Edward Island yielded 14,700 burrows, suggesting that there are 9,000-15,000 occupied nests. The nominate subspecies of white-chinned petrel occupies approximately 974,200 nests (95 % CI 678,000-1,286,000), with the Prince Edward Islands, the third most important breeding site, after South Georgia and Kerguelen. Assuming that populations breeding at islands in the Atlantic and Indian Oceans winter in different regions, the impact of fishery bycatch is likely to have had a greater impact on the Indian Ocean population. The Marion Island survey provides a baseline against which future population changes can be assessed.
机译：白-海燕（Procellaria aequinoctialis）是在南大洋的延绳钓中最常被杀死的海鸟，被列为易灭绝物种。我们估计了爱德华王子岛（Prince Edward Islands）的种群繁殖，爱德华王子岛是提名亚种的最后一个繁殖地点，但缺乏最近的种群估计。白chin海燕洞穴主要限于深厚的泥土，通常在200 m以下但在局部长达420 m的斜坡上。校正计数偏差后，马里恩岛（Marion Island）估计有29,900个巢穴（95％CI 27,700-32,400）。在一次性调查中，潜伏期开始时的洞穴占有率为65％，但重复调查发现至少有73％的洞穴被占用，而87％的洞穴显示出占用迹象。这表明在马里恩岛上大约有24,000个被占领的巢穴（95％CI 20,000-28,000）。在爱德华王子岛岛上进行的一项更为粗略的调查显示，洞穴有14,700个洞穴，这表明有9,000-15,000个被占领的巢穴。白chin海燕的提名亚种约占974,200个巢（95％CI 678,000-1,286,000），爱德华王子岛是仅次于南乔治亚州和克格伦岛的第三重要繁殖地。假设人口在大西洋和印度洋各岛上的繁殖在不同地区越冬，渔业兼捕的影响可能对印度洋人口产生更大的影响。马里恩岛（Marion Island）调查提供了一个基线，可以据此评估未来的人口变化。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号