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Foraging behaviour of western sandpipers changes with sediment temperature: implications for their hemispheric distribution

机译：西部sand的觅食行为随沉积物温度的变​​化而变化：对其半球分布的影响

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摘要

Migratory shorebirds need to replenish their energy reserves by foraging at stop-over sites en route. Adjusting their foraging behaviour to accommodate variation in local prey availability would therefore be advantageous. We test whether western sandpipers (Calidris mauri), a sexually dimorphic shorebird, adjust their foraging behaviour in response to local changes in prey availability, as inferred by changes in diurnal time and sediment temperature. Both males and females showed quantitative changes to foraging mode in relation to each of these variables. Probing, for example, which is used to exploit infaunal prey, was significantly more common at higher temperatures. The results presented here are consistent with the notion that western sandpipers can adjust their foraging behaviour in response to variation in prey availability. Further, we speculate that temperature-induced changes to prey location may contribute to the striking sexual segregation observed for this species during the non-breeding season.
机译：迁徙的水鸟需要通过在途中停留地点觅食来补充其能量储备。因此，调节它们的觅食行为以适应当地猎物可用性的变化将是有利的。我们测试了西部矶pi（Calidris mauri）（一种有性的双态水鸟）是否会根据猎物可利用性的局部变化（如昼夜时间和沉积温度的变化推断出）来调整它们的觅食行为。相对于这些变量，雄性和雌性均显示出觅食模式的定量变化。例如，用于开发不育猎物的探测在更高温度下更为普遍。此处给出的结果与以下观点一致：西方western可以根据猎物可利用性的变化来调整其觅食行为。此外，我们推测温度诱导的猎物位置变化可能导致非繁殖季节对该物种明显的性别隔离。

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