Seasonal Patterns in Daily Flight Distance and Space Use by Great Egrets (Ardea alba)

IF 0.7 4区生物学 Q3 ORNITHOLOGY

Waterbirds Pub Date : 2022-04-12 DOI:10.1675/063.044.0309

J. Brzorad, M. C. Allen, S. Jennings, E. Condeso, S. Elbin, R. Kays, David C. Lumpkin, S. Schweitzer, N. Tsipoura, A. Maccarone

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引用次数: 0

Abstract

Abstract. In an effort to quantify the value of wetland habitats, GPS technology was used to document the movement patterns of 16 Great Egrets (Ardea alba) in North America. Patterns in daily flight distances and utilization distributions (UD; estimates of area occupied on the ground) were documented throughout the annual cycle. Maximum Daily Displacement (MDD), the farthest distance occupied by a bird from colony/roost (central place) in 24 hr was greatest (4.3 ± 0.1 km) during breeding season and lowest (3.3 ± 0.1) during post-breeding season. As birds visited multiple foraging sites and made multiple round trips to central places, this Total Daily Distance (TDD) was also measured. It increased from a mean of about 12 km during the incubation phase to about 35 km at the time of fledging. Average TDD was greatest during breeding season (14.2 ± 0.3 km) and lowest during winter (11.0 ± 0.2 km). The utilization distribution increased from 128 (± 21.3) ha during breeding season to 179 (±32.6) ha during winter. Birds that foraged at tidal sites used 183.3 (± 22.2) ha, twice as much area as birds that foraged strictly in freshwater sites (89.6 ± 21.3 ha).

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大白鹭(Ardea alba)每日飞行距离和空间利用的季节规律

摘要为了量化湿地栖息地的价值，利用GPS技术记录了北美16只大白鹭(Ardea alba)的活动模式。每日飞行距离和利用分布模式(UD;在整个年度周期内记录了对地面占用面积的估计。最大日位移(Maximum Daily Displacement, MDD)是指鸟类在24小时内离群/巢(中心)最远的距离，在繁殖期最大(4.3±0.1 km)，在繁殖期后最小(3.3±0.1 km)。当鸟类访问多个觅食地点并多次往返中心地点时，也测量了总日距离(TDD)。它从孵化阶段的平均约12公里增加到羽化时的约35公里。平均TDD在繁殖期最大(14.2±0.3 km)，冬季最小(11.0±0.2 km)。利用分布由繁殖期的128(±21.3)ha增加到冬季的179(±32.6)ha。在潮汐地点觅食的鸟类面积为183.3(±22.2)ha，是严格在淡水地点觅食的鸟类(89.6±21.3 ha)的两倍。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Waterbirds 生物-鸟类学

CiteScore

1.30

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Waterbirds is an international scientific journal of the Waterbird Society. The journal is published four times a year (March, June, September and December) and specializes in the biology, abundance, ecology, management and conservation of all waterbird species living in marine, estuarine and freshwater habitats. Waterbirds welcomes submission of scientific articles and notes containing the results of original studies worldwide, unsolicited critical commentary and reviews of appropriate topics.