Don't mind the cat: Potential for intraguild interactions with lions does not affect spotted hyaena habitat selection

IF 1.9 3区 生物学 Q1 ZOOLOGY
S. Périquet, N. Courbin, E. Banda, A. J. Loveridge, D. W. Macdonald, E. Revilla, H. Fritz, M. Valeix
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引用次数: 0

Abstract

Previous work has focused on how prey availability and fear of people affect apex predators' habitat selection, but few have studied the effects of intraguild interactions. Patterns of co-occupancy between sympatric carnivores have started to be well described, but understanding the underlying habitat selection processes is lacking. We evaluated whether the risk of encountering African lions (Panthera leo) influences habitat selection by spotted hyaenas (Crocuta crocuta, hyaena hereafter) using GPS-collar data and two approaches: (1) resource selection functions considering the static long-term risk of encountering lions, and (2) step selection functions considering the dynamic, immediate risk of encountering lions. We explored the interplay between the risk of encountering lions, vegetation type and moonlight illumination, and examined individual variation in habitat selection. As expected, hyaenas did not avoid areas intensively used by lions, and there was even a positive effect of the long-term risk of encountering lions on habitat selection by hyaenas. As in other study sites, this likely arises because hyaenas select the same areas as lions. At the finer scale, unexpectedly, hyaenas did not generally move away from lions. We believe this occurs because hyaenas can sometimes be attracted to lions because of scavenging opportunities or because they outnumber lions and are likely to win an aggressive encounter. These two circumstances can lead to highly contrasting outcomes and highlight the high dynamics of intraguild interactions. This also illustrates the limits of GPS-based studies that lack crucial information about the context of interactions. While at the population level, we detected a selection for open vegetation areas, which are rich in prey in the study ecosystem and potentially good hunting grounds for cursorial predators, such as hyaenas; our results show a very high inter-individual heterogeneity underlying this population level result. Our work therefore illustrates the importance of investigating individual habitat selection.

不要介意猫:与狮子的潜在野外互动并不影响斑点鬣狗的栖息地选择
以前的工作主要集中在猎物的可用性和对人类的恐惧如何影响顶级捕食者的栖息地选择,但很少研究野生动物内部相互作用的影响。同域食肉动物共同占有的模式已经开始被很好地描述,但对潜在的栖息地选择过程的理解尚缺乏。我们利用gps项圈数据和两种方法来评估遇到非洲狮(Panthera leo)的风险是否影响斑点鬣狗(Crocuta Crocuta,以下简称鬣狗)的栖息地选择:(1)考虑遇到狮子的静态长期风险的资源选择函数,(2)考虑遇到狮子的动态即时风险的步骤选择函数。我们探索了遇到狮子的风险、植被类型和月光光照之间的相互作用,并研究了栖息地选择的个体差异。正如预期的那样,鬣狗没有避开狮子密集使用的区域,甚至存在长期遇到狮子的风险对鬣狗栖息地选择的积极影响。与其他研究地点一样,这可能是因为鬣狗选择与狮子相同的区域。出乎意料的是,在更精细的尺度上,鬣狗通常不会远离狮子。我们认为,这是因为鬣狗有时会被狮子吸引,因为它们有觅食的机会,或者因为它们的数量比狮子多,很可能在一场激烈的战斗中获胜。这两种情况可能导致截然不同的结果,并突出了群体内部互动的高度动态。这也说明了基于gps的研究的局限性,因为它们缺乏关于交互背景的关键信息。而在种群水平上,我们发现了对开放植被区域的选择,这些区域在研究生态系统中猎物丰富,并且可能是鬣狗等游食捕食者的良好狩猎场;我们的研究结果显示,在这个群体水平的结果背后,存在非常高的个体间异质性。因此,我们的工作说明了研究个体栖息地选择的重要性。
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来源期刊
Journal of Zoology
Journal of Zoology 生物-动物学
CiteScore
3.80
自引率
0.00%
发文量
90
审稿时长
2.8 months
期刊介绍: The Journal of Zoology publishes high-quality research papers that are original and are of broad interest. The Editors seek studies that are hypothesis-driven and interdisciplinary in nature. Papers on animal behaviour, ecology, physiology, anatomy, developmental biology, evolution, systematics, genetics and genomics will be considered; research that explores the interface between these disciplines is strongly encouraged. Studies dealing with geographically and/or taxonomically restricted topics should test general hypotheses, describe novel findings or have broad implications. The Journal of Zoology aims to maintain an effective but fair peer-review process that recognises research quality as a combination of the relevance, approach and execution of a research study.
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