利用GPS数据首次记录红脚隼筑巢期夜间飞行活动

IF 1.7 Q3 ECOLOGY Ecologies Pub Date : 2022-03-31 DOI:10.3390/ecologies3020006
A. Ferrarini, M. Gustin
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引用次数: 2

摘要

红足隼(Falco vespertinus)是一个对保护很有兴趣的物种。正因为如此,了解红脚隼的飞行行为对这个物种的保护很重要。在此背景下,我们使用精确的GPS数据记录仪,在2019年和2020年,分析了其在意大利两个最大殖民地的飞行活动,并收集了5840个GPS点。在夜间,所有被调查的个体在所有小时间隔内都是活跃的,它们在飞行的时间约为10%(白天为40%)。夜间飞行活动表现出双重模式:日出前频繁和长途飞行(占飞行时间的22.22%);距离鸟巢的最大距离(3公里)和日落后(飞行时间的32.14%;距离巢巢的最大距离约12公里),以及夜间(晚上10时至凌晨5时;<飞行时间的5%;我们的研究表明,在巢周围(即50-100米)增加苜蓿作物和休耕地(代替玉米和大豆作物)将极大地帮助该物种避免或至少减少夜间飞行活动,从而预期提高其繁殖成功率。我们的研究结果在推进对这种重要的红脚隼种群的了解方面迈出了一步,到目前为止,这种种群在很大程度上是未知的。我们在这里提供了红脚隼在雏鸟期间(6 - 7月)定期夜间飞行活动的第一个证据。
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First Record of the Red-Footed Falcon’s Nocturnal Flight Activity during the Nestling Period Using GPS Data
The red-footed falcon (Falco vespertinus) is a species that is of great interest to conservation. Because of this, understanding the red-footed falcon’s flight behavior is important for the conservation of this species. In this context, by using accurate GPS data-loggers, in 2019 and 2020, we analyzed its flight activity at the two largest colonies in Italy, and we collected 5840 GPS points. At night, all of the surveyed individuals were active during all of the hourly intervals, and they were in flight for about 10% of the time (40% in the daytime). The nocturnal flight activity showed a dual pattern: frequent and long-distance flights before sunrise (22.22% of time in flight; maximum distance from nest > 3 km) and after sundown (32.14% of time in flight; maximum distance from nest > 12 km), and limited and short-distance flights late at night (10 p.m.–5 a.m.; <5% of time in flight; maximum distance from nest < 100 m). Our study suggests that an increase in alfalfa crops and fallow land (in place of maize and soy crops) in the surroundings (i.e., 50–100 m) of the nests would considerably help this species to avoid, or at least to minimize, nocturnal flight activity, with expected improvements in its reproductive success. Our results are a step forward in advancing the knowledge of this important red-footed falcon population, which has been largely unknown so far. We provide here the first evidence ever of the red-footed falcon’s regular nocturnal flight activity during the nestling period (June–July).
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