Foraging behavior of a desert dwelling arthropod-gleaning bat (Otonycteris hemprichii) during pregnancy and nursing
Foraging behavior of a desert dwelling arthropod-gleaning bat (Otonycteris hemprichii) during pregnancy and nursing
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DOI：
10.3161/150811010x537873
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发表时间：
2010-01-01
影响因子：
1
通讯作者：
Pinshow, Berry
中科院分区：
文献类型：
--
作者：
Daniel, Shai;Korine, Carmi;Pinshow, Berry
我们研究了生活在沙漠中的节肢动物亨普里希长耳蝙蝠（Otonycteris hemprichii）的行为活动所起的作用，假设它们自己和后代的食物需求之间存在着一种权衡。具体来说，我们测试了以下预测：1)雌性在怀孕的前三个月到第二个三个月，随着幼崽的成长，觅食时间会逐渐提前，觅食时间也会逐渐增加；但是，2)在怀孕的最后三个月，即胎儿发育的最后阶段，雌性会更晚出现，觅食的时间也会减少；而且雌性在哺乳期觅食的时间要比怀孕期间多。我们发现，在怀孕的前三个月，蝙蝠从巢穴中出来觅食的时间更早，但在怀孕的最后两个月却不是这样，而且随着哺乳的进行，它们的出现时间并没有改变。在怀孕期间晚上较晚出现的蝙蝠花更多的时间觅食，而且，除了妊娠晚期，随着怀孕和哺乳的进展，第一次每日觅食的时间也在增加。随着怀孕和哺乳的进展，每天的总觅食时间增加。总的来说，这些结果支持我们的假设；在胚胎和幼崽发育的过程中，雌性亨普里希长耳蝙蝠通过调整觅食行为，与后代对食物的需求和自己的需求之间存在潜在的冲突。
We studied the role of behavioral activities used by desert-dwelling, arthropod gleaning Hemprich's long-eared bat (Otonycteris hemprichii), hypothesizing that there is a trade off between their own and their offspring's food needs. Specifically, we tested the following predictions: I) females will bring forward their emergence time from their roosts and increase foraging bout length progressively from the first through the second trimesters of pregnancy, and during nursing as their pups grow; but, that 2) during the last trimester of pregnancy, namely, in the final stages of foetus development, females will emerge later and there will be a reduction in foraging effort (time); and that 3) females will spend more time foraging during nursing than during pregnancy. We found that the bats emerged from their roosts to forage earlier during the first trimester, but not during the last two trimesters of pregnancy, and that they did not change their emergence time as nursing progressed. Bats that emerged later at night during pregnancy spent more time foraging, and, except for the third trimester, the length of the first daily foraging bout increased as both pregnancy and nursing progressed. Total daily foraging time increased as pregnancy and nursing progressed. Generally, these results support our hypothesis; through adjustment of their foraging behavior as embryos and pups develop, breeding female Hemprich's long-eared bats contend with the potentially conflicting food requirements of their offspring and their own needs.