Origin, age, sex and breeding status of wandering albatrosses (Diomedea exulans), northern (Macronectes halli) and southern giant petrels (Macronectes giganteus) attending demersal longliners in Falkland Islands and Scotia Ridge waters, 2001-2005
Origin, age, sex and breeding status of wandering albatrosses (Diomedea exulans), northern (Macronectes halli) and southern giant petrels (Macronectes giganteus) attending demersal longliners in Falkland Islands and Scotia Ridge waters, 2001-2005
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DOI：
10.1007/s00300-006-0192-8
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发表时间：
2007-02-01
期刊：
影响因子：
1.7
通讯作者：
Forster, Isaac
中科院分区：
文献类型：
--
作者：
Otley, Helen;Reid, Tim;Forster, Isaac
总共有547次看到291条带状的流浪信天翁Diomedea exulans和21次看到14条带状的巨型海燕Macronectes spp。是由2001年至2005年间在巴塔哥尼亚大陆架南部作业的洋枪鱼延绳钓船制成的。这包括25%的流浪信天翁与Darvic带繁殖在鸟岛（南格鲁吉亚）在此期间。在南格鲁吉亚，有13只北方的霍氏巨尾海燕和南方的巨尾海燕被环志，还有一只来自阿根廷的南方巨尾海燕。除幼鸟（< 15岁）外，所有年龄组的雄性和雌性流浪信天翁参加延绳钓船只的可能性相同。所有年龄组的大部分目击事件都发生在孵化期，最少发生在育雏期。86%的鸟类至少有过一次繁殖经历，其中一半正在繁殖，另一半正在休假（即在繁殖尝试之间）。几乎有一半的信天翁不止一次被发现。这些数据证实，南部巴塔哥尼亚大陆架是一个重要的觅食区流浪信天翁和北方和南方的巨型海燕，一些人表现出一致的协会在多年的延绳钓渔船在该地区捕鱼。
A total of 547 sightings of 291 banded wandering albatrosses Diomedea exulans and 21 sightings of 14 banded giant petrels Macronectes spp. were made from toothfish longliners operating on the southern Patagonian Shelf during 2001-2005. This included 25% of the wandering albatrosses with Darvic bands that bred at Bird Island (South Georgia) during this period. Thirteen of the northern Macronectes halli and southern giant petrels Macronectesgiganteus had been banded at South Georgia, and there was one sighting of a southern giant petrel from Argentina. Male and female wandering albatrosses of all age classes except young birds (< 15 years old) were equally likely to attend longline vessels. Most sightings of all age classes were made during the incubation period and fewest during the brood period. Eighty-six percent of birds sighted had bred at least once before, with half currently breeding and half on sabbatical (i.e. between breeding attempts). Almost half of the wandering albatrosses were sighted on more than one occasion. The data confirms that the southern Patagonian shelf is an important foraging area for wandering albatrosses and northern and southern giant petrels, and that some individuals show consistent associations in multiple years with longline vessels fishing in the region.