Age-related variation in foraging behaviour in the wandering albatross at South Georgia: no evidence for senescence.
Age-related variation in foraging behaviour in the wandering albatross at South Georgia: no evidence for senescence.
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DOI：
10.1371/journal.pone.0116415
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发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Phillips RA
中科院分区：
文献类型：
--
作者：
Froy H;Lewis S;Catry P;Bishop CM;Forster IP;Fukuda A;Higuchi H;Phalan B;Xavier JC;Nussey DH;Phillips RA
在野生脊椎动物系统中，与年龄相关的人口比率的变化现在被广泛地记录下来，并对种群和进化动力学产生重大影响。然而，支撑这种变化的机制，特别是在以后的生活中，人们还不太清楚。觅食效率是健康的关键决定因素，对个体生活史的权衡有影响。已知在老年时会衰退的各种能力，如肌肉功能和视觉敏锐度，可能会影响觅食能力。我们研究了一种长寿、生活范围广泛的海洋海鸟--游荡的信天翁Diomedea exulans--觅食行为的年龄相关变化。使用微型跟踪技术，我们比较了在南乔治亚州鸟岛繁殖的鸟类的觅食旅行特征。根据在单个繁殖季节的孵化阶段收集的运动和浸泡数据，以及从前几年从繁殖周期不同阶段收集的广泛跟踪数据，我们发现通常报道的旅行参数与年龄相关的变化的证据有限，未能发现衰老下降的迹象。我们的结果与过去考察晚年觅食行为的有限数量的研究形成了对比，因为这些研究记录了与衰老一致的性能变化。这突显了对不同野生动物种群进行研究的重要性，以获得关于驱动老龄化速度差异的过程的更广泛的视角。
Age-related variation in demographic rates is now widely documented in wild vertebrate systems, and has significant consequences for population and evolutionary dynamics. However, the mechanisms underpinning such variation, particularly in later life, are less well understood. Foraging efficiency is a key determinant of fitness, with implications for individual life history trade-offs. A variety of faculties known to decline in old age, such as muscular function and visual acuity, are likely to influence foraging performance. We examine age-related variation in the foraging behaviour of a long-lived, wide-ranging oceanic seabird, the wandering albatross Diomedea exulans. Using miniaturised tracking technologies, we compared foraging trip characteristics of birds breeding at Bird Island, South Georgia. Based on movement and immersion data collected during the incubation phase of a single breeding season, and from extensive tracking data collected in previous years from different stages of the breeding cycle, we found limited evidence for age-related variation in commonly reported trip parameters, and failed to detect signs of senescent decline. Our results contrast with the limited number of past studies that have examined foraging behaviour in later life, since these have documented changes in performance consistent with senescence. This highlights the importance of studies across different wild animal populations to gain a broader perspective on the processes driving variation in ageing rates.
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影响因子：
2.3
作者：
Arnold, Todd W.
通讯作者：
Arnold, Todd W.
影响因子：
4.8
作者：
Montgomery, Robert A.;Vucetich, John A.;Millenbah, Kelly F.
通讯作者：
Millenbah, Kelly F.
影响因子：
5.2
作者：
Hassrick, Jason L.;Crocker, Daniel E.;Costa, Daniel P.
通讯作者：
Costa, Daniel P.
影响因子：
4.8
作者：
CROXALL, JP;ROTHERY, P;PRINCE, PA
通讯作者：
PRINCE, PA
DOI：
10.1073/pnas.0911181107
发表时间：
2010-04-06
影响因子：
11.1
作者：
Lecomte, Vincent Julien;Sorci, Gabriele;Weimerskirch, Henri
通讯作者：
Weimerskirch, Henri