持续的掠食压力可能会防止避难所种群的反掠食者特征的丧失
Natasha D Harrison1, Ben L Phillips2, Adrian F Wayne1,3
1School of Biological Sciences University of Western Australia Crawley Western Australia Australia.
Ecology and evolution
|July 11, 2024
概括
保护天堂可能会导致野生动物失去反捕食者特征. 在避风港内保持捕食者压力有助于保持这些关键的生存行为在像Woylie这样的种群.
科学领域:
- 生态生态学 生态生态学
- 保护生物学 保护生物学
- 野生动物管理 野生动物管理
背景情况:
- 保护天堂对于保护野生动物免受入侵掠食者的侵害至关重要.
- 避风港内的种群可能会失去必要的抗捕食者特征,阻碍其重新引入野生环境.
- 捕食压力可以影响维持反捕食者的行为.
研究的目的:
- 为了研究哺乳动物捕食者存在对 woylie (Bettongia penicillata ogilbyi) 种群的反捕食者特征的影响.
- 为了比较在没有捕食者的避风港,与本地捕食者的避风港以及非避风港地区的鸟之间的行为和形态特征.
- 为了确定在保护避风港内保持低水平的掠食压力是否可以防止反掠食者特征的丧失.
主要方法:
- 机会性比较四个 woylie 种群:一个没有捕食者的避风港,一个与本地捕食者 (chuditch;Dasyurus geoffroii) 的避风港,以及他们各自的非避风港对应物.
- 评估行为特征,包括食站的互动和对人类处理的反应.
- 测量形态特征,如后脚的长度和体重.
主要成果:
- 在没有捕食者的避风港里的羊比没有避风港的参考群体更小,反应也更少.
- 在chuditch的避风港和它们相邻的非避风港对应物中,在 woylies 之间没有观察到行为或形态上的显著差异.
- 抗捕食者反应在捕食者活动较高的地点更强,这表明对捕食者压力的适应性反应.
结论:
- 将哺乳动物捕食者排除在保护天堂之外,可能会导致 woylie 种群的反捕食者特征丧失.
- 在避风港内,像chuditch这样的本地捕食者的存在可能有助于保持这些关键特征.
- 在保护区中维持一定程度的哺乳动物掠食压力可能是一个有效的策略,以保护野生动物适应能力,以便在未来重新野生化.
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