Foraging fidelity as a recipe for a long life: foraging strategy and longevity in male Southern Elephant Seals.
Foraging fidelity as a recipe for a long life: foraging strategy and longevity in male Southern Elephant Seals.
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DOI：
10.1371/journal.pone.0032026
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
Guinet C
中科院分区：
文献类型：
--
作者：
Authier M;Bentaleb I;Ponchon A;Martin C;Guinet C
生物学家和人口统计学家长期以来一直对确定影响寿命的个体因素感兴趣：当绝大多数人都没有做到的时候，一些人是如何设法避开死亡的力量的？这个问题并不简单，部分原因是准确估计野生动物寿命的艰巨任务，以及将随时间变化的生态协变量与单个数字（事件发生时间）相关联的统计困难。在这里，我们研究了觅食策略和寿命之间的关系，在一个难以捉摸的大型海洋捕食者：南象海豹（Mirounga leonina）。使用从南大洋的Kerguelen岛上的死亡男性身上找到的牙齿，我们首先对标本进行了老化。利用牙本质中碳的稳定同位素测定研究了觅食地点对个体寿命的影响。使用一个联合变点/生存建模的方法，使我们能够描述觅食的个体发育轨迹，我们揭示了如何稳定的觅食策略，制定了早期的生活积极共变与长寿的男性南方象海豹。再加上适当的统计分析，稳定同位素有可能解决长期感兴趣的生态问题，但其答案一直受到后勤限制。
Identifying individual factors affecting life-span has long been of interest for biologists and demographers: how do some individuals manage to dodge the forces of mortality when the vast majority does not? Answering this question is not straightforward, partly because of the arduous task of accurately estimating longevity in wild animals, and of the statistical difficulties in correlating time-varying ecological covariables with a single number (time-to-event). Here we investigated the relationship between foraging strategy and life-span in an elusive and large marine predator: the Southern Elephant Seal (Mirounga leonina). Using teeth recovered from dead males on îles Kerguelen, Southern Ocean, we first aged specimens. Then we used stable isotopic measurements of carbon () in dentin to study the effect of foraging location on individual life-span. Using a joint change-point/survival modelling approach which enabled us to describe the ontogenetic trajectory of foraging, we unveiled how a stable foraging strategy developed early in life positively covaried with longevity in male Southern Elephant Seals. Coupled with an appropriate statistical analysis, stable isotopes have the potential to tackle ecological questions of long standing interest but whose answer has been hampered by logistic constraints.
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DOI：
10.1137/0908055
发表时间：
1987-07-01
期刊：
SIAM JOURNAL ON SCIENTIFIC AND STATISTICAL COMPUTING
影响因子：
--
作者：
ANDERSON, TW;OLKIN, I;UNDERHILL, LG
通讯作者：
UNDERHILL, LG
影响因子：
2.5
作者：
Bentaleb, I.;Martin, C.;Guinet, C.
通讯作者：
Guinet, C.
影响因子：
4.8
作者：
Aubry, Lise M.;Cam, Emmanuelle;Pavard, Samuel
通讯作者：
Pavard, Samuel
DOI：
10.1098/rspb.2007.0454
发表时间：
2007-08-07
影响因子：
4.7
作者：
Beauplet, Gwenael;Guinet, Christophe
通讯作者：
Guinet, Christophe
DOI：
10.1016/j.dsr2.2006.11.005
发表时间：
2007-01-01
影响因子：
3
作者：
Bailleul, Frederic;Charrassin, Jean-Benoit;Guinet, Chrisstophe
通讯作者：
Guinet, Chrisstophe