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Influence of sea turtle nesting on hunting behavior and movements of jaguars in the dry forest of northwest Costa Rica
Biotropica ( IF 2.1 ) Pub Date : 2020-05-25 , DOI: 10.1111/btp.12803
Víctor H. Montalvo 1, 2 , Todd K. Fuller 2 , Carolina Saénz‐Bolaños 1, 2 , Juan Carlos Cruz-Díaz 1, 2 , Isabel Hagnauer 1, 3 , Hansell Herrera 1 , Eduardo Carrillo 1, 2
Affiliation  

Jaguars (Panthera onca) are opportunistic predators that prey on large profitable prey items, such as sea turtles at nesting beaches. Here, we use jaguar and sea turtle track‐count surveys, combined with satellite telemetry of one jaguar, to evaluate whether jaguar hunting behavior and movements are influenced by seasonal sea turtle nesting in the Sector Santa Rosa of Área de Conservación Guanacaste in northwest Costa Rica. We used generalized linear models to evaluate the effect of moon phase and sea surface temperature on olive ridley (Lepidochelis olivacea) and green turtle (Chelonia mydas) nesting abundance, as well as the combination of these predictors on the frequency of jaguar predation activity (proximity to nesting beaches) and movements. For home‐range size and location analyses, we calculated kernel density estimates for each season at three different temporal scales. Sea turtle nesting season influenced jaguar activity patterns, as well as sea turtle abundance was related to jaguar locations and predation events, but jaguar home‐range size (88.8 km2 overall) did not differ between nesting seasons or among temporal scales. Environmental conditions influenced sea turtle nesting and, as a consequence, also influenced jaguar movements and foraging activity. Our study defined the home range of a female jaguar in the tropical dry forest and its relationship to seasonally abundant turtles. Additional information related to the effect of tourism on jaguar–sea turtle interactions would improve conservation of these species at unique nesting beaches in the area.

中文翻译:

海龟筑巢对哥斯达黎加西北部干旱森林中美洲虎的狩猎行为和活动的影响

美洲虎(Panthera onca)是机会主义的掠食者,它们捕食大量有利可图的猎物,例如筑巢海滩上的海龟。在这里,我们使用美洲虎和海龟的追踪计数调查,结合对一只美洲虎的卫星遥测,来评估美洲豹在哥斯达黎加西北瓜纳卡斯特(ÁreadeConservaciónGuanacaste)的Santa Rosa地区的季节性海龟筑巢对美洲虎的捕猎行为和活动的影响。 。我们使用广义线性模型评估月相和海面温度对橄榄ridley(Lepidochelis olivacea)和绿海龟(Chelonia mydas)的影响)的筑巢丰度,以及这些预测因子对美洲虎捕食活动(邻近筑巢海滩)的频率和运动的组合。对于家庭范围的大小和位置分析,我们在三个不同的时间尺度上计算了每个季节的仁密度估计值。海龟的筑巢季节影响了美洲虎的活动模式,海龟的丰度也与美洲虎的位置和捕食事件有关,但美洲虎的繁殖范围(88.8 km 2总体而言)在筑巢季节之间或时间尺度上没有差异。环境条件影响了海龟的筑巢,因此也影响了美洲虎的活动和觅食活动。我们的研究确定了热带干旱森林中美洲虎的栖息地及其与季节性海龟的关系。有关旅游业对美洲虎与海龟相互作用的影响的其他信息将改善该地区独特的筑巢海滩上这些物种的保护。
更新日期:2020-05-25
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