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首页> 外文学位 >Winter distribution and pre-breeding survival of the thick-billed murre, Uria lomvia, from the northwestern Atlantic. Implications for management of the Newfoundland turr hunt.
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Winter distribution and pre-breeding survival of the thick-billed murre, Uria lomvia, from the northwestern Atlantic. Implications for management of the Newfoundland turr hunt.

机译：来自西北大西洋的厚嘴鱼乌里亚（Uria lomvia）的冬季分布和繁殖前存活率。对纽芬兰寻猎活动的管理意义。

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摘要

New legislation which entrenches regulation of the turr hunt in Newfoundland into the Migratory Birds Convention Act, will require good knowledge of thick-billed murre (Uria lomvia) population biology for proper implementation. The impact of hunting on the population is determined by factors such as total bag, season length and timing, and the age of birds killed. These in turn depend on the temporal and spatial distribution of murres of different ages and from different colonies.; Birds in their first winter were recovered in greater numbers than birds from older age categories and were usually recovered earlier in the season. Recovery rates of first winter and second winter birds from Digges Island were significantly lower than those for birds of the same age from the adjacent colony on Coats Island suggesting different spatial distributions of the young birds from the two colonies. Differences in the overwintering areas for adults from Coburg Island and Cape Hay, again located closely together, differed significantly with Coburg adults recovered in greater numbers in Newfoundland while Cape Hay adults were recovered most often in Western Greenland.; Using recoveries of birds banded on Coats Island, annual survival from fledging to first year was estimated at 0.53 using the program SURVIV. Survival from second to third year was estimated at 0.83, from third to fourth year was 0.74, from fourth to fifth year was 0.86. The estimate from third to fourth year was considered to be an underestimate as a result of the high mobility of third year birds at the colony. Based on these survival probabilities, survival to breeding age, using the best estimates from band recoveries and resightings was estimated at 0.27. (Abstract shortened by UMI.)
机译：新的法规将对纽芬兰的猎杀行为进行管制，纳入《候鸟公约》，这将需要对厚嘴（Uria lomvia）种群生物学有充分的了解，以便正确实施。狩猎对种群的影响取决于总袋数，季节长度和时机以及被杀死鸟类的年龄等因素。这些又取决于不同年龄和来自不同殖民地的鼠的时空分布。第一个冬季的鸟类被回收的数量要多于年龄较大的鸟类，并且通常在该季节的早期被恢复。 Digges岛的第一个冬季和第二个冬季鸟类的恢复率显着低于Coats岛上相邻殖民地的同龄鸟类的恢复率，这表明两个殖民地的幼鸟的空间分布不同。再次紧密相连的科堡岛和开普海角成年人越冬地区的差异显着不同，在纽芬兰发现的科堡成年成年人数量更多，而在西格陵兰最常见的是开普海角成年人。根据高士岛上带状鸟类的回收率，使用SURVIV程序估计从出雏到第一年的年生存率为0.53。从第二年到第三年的生存率估计为0.83，从第三年到第四年的生存率为0.74，从第四年到第五年的生存率为0.86。第三至第四年的估计值被低估了，因为该殖民地的第三年鸟类具有很高的活动能力。根据这些生存概率，使用波段恢复和重新观察的最佳估计，到繁殖年龄的生存估计为0.27。 （摘要由UMI缩短。）

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