Lamichhane Saneer, Lamichhane Babu Ram, Gurung Aasish, Rayamajhi Trishna, Dahal Tulasi Prasad, Regmi Pramod Raj, Pokheral Chiranjibi Prasad, Pathak Abhinaya, Panta Ganesh, Kandel Ram Chandra, Oli Madan K
National Trust for Nature Conservation Kathmandu Nepal.
Department of Wildlife Ecology and Conservation School of Natural Resources and Environment University of Florida Gainesville Florida USA.
Ecol Evol. 2023 Jun 15;13(6):e10200. doi: 10.1002/ece3.10200. eCollection 2023 Jun.
Human activities can influence behaviors of predators and prey, as well as predator-prey interactions. Using camera trap data, we investigated whether or to what extent human activities influenced behaviors of predators (tigers and leopards) and prey (sambar deer, spotted deer, wild boar, and barking deer), and predator-prey interactions in the Barandabhar Corridor Forest (BCF), Chitwan District, Nepal. A multispecies occupancy model revealed that the presence of humans altered the conditional occupancy of both prey and predator species. Specifically, the conditional occupancy probability of prey was substantially higher ( = 0.91, CI = 0.89-0.92) when humans were present than when humans were absent ( = 0.68, CI = 0.54-0.79). The diel activity pattern of most prey species overlapped strongly with humans, whereas predators were generally more active when humans were absent. Finally, the spatiotemporal overlap analysis revealed that human-prey interactions (i.e., the probability that both humans and prey species being present on the same grid at the same hourly period) was ~3 times higher (10.5%, CI = 10.4%-10.6%) compared to spatiotemporal overlap between humans and predators (3.1%, CI = 3.0%-3.2%). Our findings are consistent with the human shield hypothesis and suggest that ungulate prey species may reduce predation risk by using areas with high human activities.
人类活动会影响捕食者和猎物的行为,以及捕食者与猎物之间的相互作用。我们利用相机陷阱数据,研究了人类活动是否以及在何种程度上影响了尼泊尔奇旺区巴兰达巴尔走廊森林(BCF)中捕食者(老虎和豹)和猎物(水鹿、花鹿、野猪和赤麂)的行为,以及捕食者与猎物之间的相互作用。一个多物种占有率模型显示,人类的存在改变了猎物和捕食者物种的条件占有率。具体而言,当人类在场时,猎物的条件占有率概率(=0.91,CI=0.89-0.92)显著高于人类不在场时(=0.68,CI=0.54-0.79)。大多数猎物物种的昼夜活动模式与人类有很强的重叠,而捕食者通常在人类不在场时更活跃。最后,时空重叠分析表明,人类与猎物的相互作用(即人类和猎物物种在同一小时时段出现在同一网格上的概率)比人类与捕食者之间的时空重叠(3.1%,CI=3.0%-3.2%)高约3倍(10.5%,CI=10.4%-10.6%)。我们的研究结果与人类盾牌假说一致,并表明有蹄类猎物物种可能通过利用人类活动频繁的区域来降低被捕食的风险。