Does foraging performance change with age in female little penguins (Eudyptula minor)?
Does foraging performance change with age in female little penguins (Eudyptula minor)?
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DOI：
10.1371/journal.pone.0016098
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发表时间：
2011-01-25
期刊：
影响因子：
3.7
通讯作者：
Chiaradia A
中科院分区：
文献类型：
--
作者：
Zimmer I;Ropert-Coudert Y;Kato A;Ancel A;Chiaradia A
与年龄相关的繁殖性能的变化很可能是通过亲代觅食性能的变化来调节的。在2005年繁殖季节的守卫期，我们调查了澳大利亚菲利普岛雌性小企鹅的觅食行为与年龄的关系。用加速度计记录了分成三个年龄组的鸟类的觅食参数：(1)年轻的，(2)中年的和(3)老年的。我们发现中年鸟类的俯冲行为与年轻和老年鸟类不同。中年雌性鸟类的潜水持续时间短于青年和老年鸟类，而其潜水努力(潜水和潜水后持续时间的关系)低于青年鸟类，表明中年鸟类的身体状况好于其他鸟类。不同年龄段的猎物追逐频率和持续时间没有差异，但在捕食策略上存在差异。雌性在潜水达到最大深度后追逐的猎物越多，她们越有经验(老中青)，这可能是一种利用向上推力的能量节约的狩猎策略。我们建议中年企鹅比年轻或年老的企鹅更好地觅食，因为良好的身体状况和觅食经验可以同时起作用。
Age-related changes in breeding performance are likely to be mediated through changes in parental foraging performance. We investigated the relationship of foraging performance with age in female little penguins at Phillip Island, Australia, during the guard phase of the 2005 breeding season. Foraging parameters were recorded with accelerometers for birds grouped into three age-classes: (1) young, (2) middle age and (3) old females. We found the diving behaviour of middle-aged birds differed from young and old birds. The dive duration of middle age females was shorter than that of young and old birds while their dive effort (measure for dive and post-dive duration relation) was lower than that of young ones, suggesting middle-aged birds were in better physical condition than other ones. There was no difference in prey pursuit frequency or duration between age classes, but in the hunting tactic. Females pursued more prey around and after reaching the maximum depth of dives the more experienced they were (old > middle age > young), an energy saving hunting tactic by probably taking advantage of up-thrust momentum. We suggest middle age penguins forage better than young or old ones because good physical condition and foraging experience could act simultaneously.
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DOI：
10.1098/rspb.1999.0805
发表时间：
1999-07-22
影响因子：
4.7
作者：
Daunt, F;Wanless, S;Monaghan, P
通讯作者：
Monaghan, P
影响因子：
2.4
作者：
Cherel, Y;Tremblay, Y;Georges, JY
通讯作者：
Georges, JY
影响因子：
2.5
作者：
GREIG, SA;COULSON, JC;MONAGHAN, P
通讯作者：
MONAGHAN, P
影响因子：
2.1
作者：
DUNN, EK
通讯作者：
DUNN, EK
影响因子：
2.5
作者：
Daniel, T. A.;Chiaradia, A.;Reina, R. D.
通讯作者：
Reina, R. D.