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首页> 外文期刊>Ostrich >Biometrics, moult and migration of Grey Plovers, Pluvialis squatarola, at Mida Creek, Kenya
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Biometrics, moult and migration of Grey Plovers, Pluvialis squatarola, at Mida Creek, Kenya

机译：肯尼亚米达河的灰P（Pluvialis squatarola）灰P的生物特征，换羽和迁徙

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摘要

Ringing data for 269 Grey Plovers, Pluvialis squatarola, caught between 1977 and 1988 were analysed. Adults started primary moult soon after arrival in August and September. Mean starting date of adult primary moult was estimated to be 13 September, primary moult duration as 130 days. First-year birds had not started primary moult by early May. Body mass of adults in primary moult was stable from September to February, averaging 205 g, but increased at the end of the moult in March and April. Pre-migratory body mass was estimated at 268 g and would allow anon-stop flight as far as the southeastern Mediterranean or the northern Persian Gulf. Mean wing length increased in March and April, possibly due to the arrival of longer-winged migrants from southern Africa or an earlier departure of males. A decrease in numbers was observed from the second half of April and by mid-May all adults had left the area. In June/July, the number of first-year birds was c. 25% of the total summer population.
机译：分析了在1977年至1988年之间捕获的269头灰P（Pluvialis squatarola）的铃声数据。成年人在八月和九月抵达后即开始换羽。成人原发性蜕皮的平均起始日期估计为9月13日，原发性蜕皮持续时间为130天。到5月初，一年级鸟类还没有开始换羽。从九月到二月，成年人的体重稳定在平均水平，为205克，但在三月和四月的末期体重增加了。迁徙前的体重估计为268克，可以不停地飞行到地中海东南部或波斯湾北部。 3月和4月的平均机翼长度增加了，这可能是由于来自南部非洲的长翼移民的到来或雄性较早离开的原因。从4月下半月开始观察到人数减少，到5月中旬，所有成年人都离开了该地区。在6月/ 7月，一年级鸽的数量为c。夏季总人口的25％。

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