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郊狼在繁殖期的精细尺度运动和行为。

Fine-scale movements and behaviors of coyotes () during their reproductive period.

作者信息

Chamberlain Michael J, Cohen Bradley S, Wightman Patrick H, Rushton Emily, Hinton Joseph W

机构信息

Warnell School of Forestry and Natural Resources University of Georgia Athens GA USA.

College of Arts and Sciences Tennessee Technological University Cookeville TN USA.

出版信息

Ecol Evol. 2021 Jun 15;11(14):9575-9588. doi: 10.1002/ece3.7777. eCollection 2021 Jul.

Abstract

In canids, resident breeders hold territories but require different resources than transient individuals (i.e., dispersers), which may result in differential use of space, land cover, and food by residents and transients. In the southeastern United States, coyote () reproduction occurs during spring and is energetically demanding for residents, but transients do not reproduce and therefore can exhibit feeding behaviors with lower energetic rewards. Hence, how coyotes behave in their environment likely differs between resident and transient coyotes. We captured and monitored 36 coyotes in Georgia during 2018-2019 and used data from 11 resident breeders, 12 predispersing residents (i.e., offspring of resident breeders), and 11 transients to determine space use, movements, and relationships between these behaviors and landcover characteristics. Average home range size for resident breeders and predispersing offspring was 20.7 ± 2.5 km² and 50.7 ± 10.0 km², respectively. Average size of transient ranges was 241.4 ± 114.5 km². Daily distance moved was 6.3 ± 3.0 km for resident males, 5.5 ± 2.7 km for resident females, and 6.9 ± 4.2 km for transients. We estimated first-passage time values to assess the scale at which coyotes respond to their environment, and used behavioral change-point analysis to determine that coyotes exhibited three behavioral states. We found notable differences between resident and transient coyotes in regard to how landcover characteristics influenced their behavioral states. Resident coyotes tended to select for areas with denser vegetation while resting and foraging, but for areas with less dense vegetation and canopy cover when walking. Transient coyotes selected areas closer to roads and with lower canopy cover while resting, but for areas farther from roads when foraging and walking. Our findings suggest that behaviors of both resident and transient coyotes are influenced by varying landcover characteristics, which could have implications for prey.

摘要

在犬科动物中,留居繁殖者占据领地,但与暂居个体(即扩散个体)所需资源不同,这可能导致留居者和暂居者对空间、土地覆盖和食物的利用存在差异。在美国东南部,郊狼()的繁殖发生在春季,这对留居者来说精力消耗巨大,但暂居者不繁殖,因此可能表现出能量回报较低的觅食行为。所以,留居郊狼和暂居郊狼在其环境中的行为方式可能有所不同。2018 - 2019年期间,我们在佐治亚州捕获并监测了36只郊狼,利用11只留居繁殖者、12只预扩散留居者(即留居繁殖者的后代)和11只暂居者的数据,来确定空间利用、活动情况以及这些行为与土地覆盖特征之间的关系。留居繁殖者和预扩散后代的平均家域面积分别为20.7±2.5平方千米和50.7±10.0平方千米。暂居者活动范围的平均面积为241.4±114.5平方千米。留居雄性每天移动的距离为6.3±3.0千米,留居雌性为5.5±2.7千米,暂居者为6.9±4.2千米。我们估计了首次通过时间值,以评估郊狼对其环境做出反应的尺度,并使用行为变化点分析来确定郊狼表现出三种行为状态。我们发现,在土地覆盖特征如何影响它们的行为状态方面,留居郊狼和暂居郊狼存在显著差异。留居郊狼在休息和觅食时倾向于选择植被更茂密的区域,但在行走时选择植被密度较低和树冠覆盖较少的区域。暂居郊狼在休息时选择靠近道路且树冠覆盖较低的区域,但在觅食和行走时选择离道路较远的区域。我们的研究结果表明,留居郊狼和暂居郊狼的行为都受到不同土地覆盖特征的影响,这可能对猎物产生影响。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d349/8293769/d0c4f96269a9/ECE3-11-9575-g002.jpg

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