Slavík Ondřej, Horký Pavel, Závorka Libor
Department of Zoology and Fisheries, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic.
Department of Zoology and Fisheries, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic; Department of Zoology, University of Gothenburg, Göteborg, Sweden.
PLoS One. 2014 Jun 4;9(6):e98997. doi: 10.1371/journal.pone.0098997. eCollection 2014.
Animals use dispersed resources within their home range (HR) during regular day-to-day activities. The high-quality area intensively used by an individual, where critical resources are concentrated, has been designated as the core area (CA). This study aimed to describe how animals utilize energy in the HR and CA assuming that changes would occur according to the size of the used areas. We observed energetic costs of space use in the largest European freshwater predator catfish, Silurus glanis, using physiological sensors. Catfish consumed significantly more energy within the CA compared to the rest of the HR area. In addition, energetic costs of space use within a large area were lower. These results generally indicate that utilization of larger areas is related to less demanding activities, such as patrolling and searching for new resources and mates. In contrast, fish occurrence in small areas appears to be related to energetically demanding use of spatially limited resources.
动物在日常活动中会利用其家域（HR）内分散的资源。个体密集使用的高质量区域，即关键资源集中的区域，被指定为核心区域（CA）。本研究旨在描述动物如何在其家域和核心区域利用能量，并假设能量利用会根据所使用区域的大小而发生变化。我们使用生理传感器观察了欧洲最大的淡水捕食者鲶鱼（Silurus glanis）空间利用的能量消耗。与家域的其他区域相比，鲶鱼在核心区域内消耗的能量明显更多。此外，大面积空间利用的能量消耗较低。这些结果总体表明，使用较大区域与要求较低的活动有关，如巡逻以及寻找新资源和配偶。相比之下，鱼类在小区域的出现似乎与对空间有限资源的高能量需求利用有关。
