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首页> 外文期刊>Polar biology >The white-chinned petrel (Procellaria aequinoctialis) on South Georgia: population size, distribution and global significance
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The white-chinned petrel (Procellaria aequinoctialis) on South Georgia: population size, distribution and global significance

机译：乔治亚州南部的白海燕（Procellaria aequinoctialis）：种群规模，分布和全球意义

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More white-chinned petrels (Procellaria aequinoctialis) are accidentally killed in fisheries than probably any other seabird in the world, but the population impact of this mortality is poorly understood, partly because there have been no recent estimates of the species' abundance. The breeding aggregation on the sub-Antarctic island of South Georgia is believed to be larger than all others combined. We estimated the size of this population by calculating the area of suitable habitat and the density of occupied burrows within it. Some 670,000 occupied nests were estimated for the island at mid-incubation, representing 0.9 million pairs of breeding-age birds associated with South Georgia in the survey seasons (2005/06 and 06/07). This is 40-45% of the previous estimate, but still represents well over half of the global population. If the population is declining due to fishery bycatch, as is likely, the scale of annual mortality in this population alone is at least in the high tens of thousands, and plausibly hundreds of thousands.
机译：与世界上其他海鸟相比，在渔业中意外杀死的白white海燕（Procellaria aequinoctialis）比世界上其他海鸟要多，但是人们对这种死亡率的种群影响了解得很少，部分原因是最近没有对该物种丰度的估计。据信，南乔治亚南部亚岛上的繁殖种群比其他所有种群的总和还要大。我们通过计算合适的栖息地的面积和其中所居住的洞穴的密度来估算人口的数量。估计在孵化中期，该岛约有670,000个被占领的巢，在调查季节（2005/06和06/07）代表90万对与南乔治亚州有关的繁殖年龄的鸟类。这是先前估计的40-45％，但仍占全球人口的一半以上。如果由于渔业兼捕而使人口下降，那么很可能仅这个人口的年死亡率就至少是几万，可能是几十万。

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