Response to resources and parasites depends on health status in extensively grazed sheep.
Response to resources and parasites depends on health status in extensively grazed sheep.
复制标题
对资源和寄生虫的反应取决于广泛放牧的羊的健康状况。
DOI：
10.1098/rspb.2019.2905
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Liddell C
中科院分区：
文献类型：
--
作者：
Liddell C
动物生态学的一个基本问题是个体的内部状态和外部环境如何共同塑造栖息地的物种分布。越来越多的生物记录仪正在推动一场革命，以回答广泛物种的这个问题。在这项研究中，从全球定位系统项圈的羊（Ovis aries）的位置集成了遥感数据，寄生虫分布的实地采样，寄生虫负荷和健康措施，为每个标记的个人。这允许个体间的变化，在栖息地的使用进行检查。一旦控制了植被生产力和蜱虫丰度之间的正相关关系，健康的人花更多的时间在植被生产力较高的网站，而不太健康的人表现出更强的（负）蜱虫丰度的反应。这些趋势很可能代表了觅食决策的权衡，这些决策因个体的健康状况而异。鉴于探索动物分布如何受到健康和外部因素影响的研究很少，我们展示了将生物记录技术与遥感数据，传统生态采样和动物健康个体措施相结合的价值。我们的研究，使用广泛放牧绵羊作为模型系统，开辟了新的可能性，研究自由生活放牧系统。
A fundamental question in animal ecology is how an individual's internal state and the external environment together shape species distributions across habitats. The increasing availability of biologgers is driving a revolution in answering this question in a wide range of species. In this study, the position of sheep (Ovis aries) from Global Positioning System collars was integrated with remote sensing data, field sampling of parasite distributions, and parasite load and health measures for each tagged individual. This allowed inter-individual variation in habitat use to be examined. Once controlling for a positive relationship between vegetation productivity and tick abundance, healthier individuals spent more of their time at sites with higher vegetation productivity, while less healthy individuals showed a stronger (negative) response to tick abundance. These trends are likely to represent a trade-off in foraging decisions that vary between individuals based on their health status. Given the rarity of studies that explore how animal distributions are affected by health and external factors, we demonstrate the value of integrating biologging technology with remote sensing data, traditional ecological sampling and individual measures of animal health. Our study, using extensively grazed sheep as a model system, opens new possibilities to study free-living grazing systems.