Sexual-size dimorphism modulates the trade-off between exploiting food and wind resources in a large avian scavenger.
Sexual-size dimorphism modulates the trade-off between exploiting food and wind resources in a large avian scavenger.
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DOI：
10.1038/s41598-017-11855-0
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发表时间：
2017-09-13
影响因子：
4.6
通讯作者：
Lambertucci SA
中科院分区：
文献类型：
--
作者：
Alarcón PAE;Morales JM;Donázar JA;Sánchez-Zapata JA;Hiraldo F;Lambertucci SA
动物被期望将活动例程与资源在自然界中出现的时间模式同步。因此，依赖于资源的物种显示时间上不匹配的模式，应该预计调度例程，平衡利用他们中的每一个的机会。大型鸟类食腐动物依赖于尸体，这些尸体更有可能在清晨获得，但它们也依赖于风资源（即上升）来平息下午时间更强的飞行。为了了解这些鸟类如何处理这种潜在的权衡，我们研究了全球最大的陆地翱翔食腐动物安第斯秃鹰（Vultur gryphus）的GPS标记个体的日常活动。安第斯神鹰的体重差异很大，并且显示出巨大的两性异形，这使得我们能够评估性别和身体大小对它们日常生活的影响。我们发现，秃鹰在最佳时间之间使用一种中间解决方案策略来利用尸体和隆起，这种策略在一年中不断变化。较大的男性安排较早的例程，更紧密地与隆起的可用性相比，较小的女性，导致性别之间的部分时间隔离。秃鹰的惯例反映了性别大小依赖的权衡，这可能是研究种群的生态和社会生物学特征的基础。
Animals are expected to synchronize activity routines with the temporal patterns at which resources appear in nature. Accordingly, species that depend on resources showing temporally mismatched patterns should be expected to schedule routines that balance the chances of exploiting each of them. Large avian scavengers depend on carcasses which are more likely available early in the morning, but they also depend on wind resources (i.e. uplifts) to subside flight which are stronger in afternoon hours. To understand how these birds deal with this potential trade-off, we studied the daily routines of GPS-tagged individuals of the world’s largest terrestrial soaring scavenger, the Andean condor (Vultur gryphus). Andean condors vary largely in weight and show a huge sexual dimorphism that allowed us to evaluate the effect of sex and body size on their daily routines. We found that condors use an intermediate solution strategy between the best times to exploit carcasses and uplifts, with this strategy changing over the year. Bigger males scheduled earlier routines that aligned more closely with uplift availability compared to smaller females, resulting in a partial temporal segregation between sexes. Condors’ routines reflect a sexual-size dependent trade-off that may underpin ecological and sociobiological traits of the studied population.
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影响因子：
4.1
作者：
Kelly MW;DeBiasse MB;Villela VA;Roberts HL;Cecola CF
通讯作者：
Cecola CF
影响因子：
8.8
作者：
Bohrer, Gil;Brandes, David;Tremblay, Junior A.
通讯作者：
Tremblay, Junior A.
影响因子：
3.4
作者：
Carrete, M.;Lambertucci, S. A.;Donazar, J. A.
通讯作者：
Donazar, J. A.
影响因子：
2
作者：
Donazar, Jose A.;Cortes-Avizanda, Ainara;Carrete, Martina
通讯作者：
Carrete, Martina
影响因子：
3.7
作者：
Duriez, Olivier;Kato, Akiko;Ropert-Coudert, Yan
通讯作者：
Ropert-Coudert, Yan