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- W4283163569 abstract "Abstract The body mass of small mammals is widely regarded as an indicator of habitat quality, with trade‐offs between anti‐predator and energy‐building behaviors noted across many species and habitat conditions as suggested by optimal foraging theory. In this study, however, grazing by domestic yak was noted to mediate this effect, affecting both the body mass and behaviors of plateau pika, Ochotona curzoniae , which deviated from expected ecological patterns. Specifically, we compared conditions of plateau pika at 16 trap sites across a range of habitats on the Tibetan plateau, each characterized by herders according to their seasonal use as winter, spring, or summer pastures, and to their vegetative conditions. Plateau pika body mass at herders' tent sites where female and young domestic yak sleep was about 6% higher than at yak foraging sites and 10% higher than fenced areas (where yak are excluded) despite the additional disturbance encountered at tent sites. Mean body mass of plateau pika also decreased with increasing slope, and adult body mass was lower in spring compared to winter and summer seasons. Furthermore, more pika burrows were found near herders' tent sites, with burrows exhibiting significantly lower vegetation cover. Pika foraging behavior was most frequent in yak bedding areas (near herders' tent sites), and pika vigilant behavior at yak foraging areas. Recalling that foraging and vigilant (predator avoidance) behaviors constitute energy trade‐offs, we speculate that these unexpected findings may result from the combined effects of soil erosion (due to surface disturbances) and fertilization (with yak dung) at yak resting sites, which could enable higher population densities and body masses of plateau pika despite lower vegetation cover at the tent sites – most likely due to critical behavioral adaptations, ecological dynamics such as predator‐prey relations and other multi‐dimensional and nonlinear reasons." @default.
- W4283163569 created "2022-06-21" @default.
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- W4283163569 date "2022-06-19" @default.
- W4283163569 modified "2023-09-26" @default.
- W4283163569 title "Effects of land use and yak grazing on behavior and body mass of plateau pika in Tibetan plateau rangelands" @default.
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- W4283163569 doi "https://doi.org/10.1111/grs.12375" @default.
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