Relative abundance of oceanic juvenile loggerhead sea turtles in relation to nest production at source rookeries: implications for recruitment dynamics
Relative abundance of oceanic juvenile loggerhead sea turtles in relation to nest production at source rookeries: implications for recruitment dynamics
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海洋幼蠵龟的相对丰度与栖息地巢穴生产的关系：对补充动态的影响
DOI：
10.1038/s41598-019-49434-0
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发表时间：
2019
影响因子：
4.6
通讯作者：
A. Bolten
中科院分区：
文献类型：
--
作者：
F. Vandeperre;H. Parra;C. Pham;M. Machete;Marco Santos;K. Bjorndal;A. Bolten
在孵化后，大多数海龟的幼崽会在海洋盆地进行长途迁徙，并在海洋栖息地停留数年。评估这一海洋阶段的人口丰度和人口参数具有挑战性。人口评估的两个长期公认的缺陷是：(i)依赖于筑巢海滩上的巢穴或繁殖雌性的数量趋势和（ii）对调节早期海洋阶段征聘的因素的无知。为了解决这些关键的差距，我们检查了15年来由亚速尔群岛渔业观察员偶然收集的标准化红海龟目击数据。从2001年到2015年，在67,922公里的调查工作中，发现了429只红海龟。我们使用基于模型的方法来评估环境因素的影响，并首次估计了海洋阶段幼海龟的相对丰度。在此期间，经过3年的滞后调整，亚速尔群岛红海龟的相对丰度跟踪了佛罗里达州源栖息地的年度巢穴丰度。丰度模式的这种一致性表明，向海洋阶段的补充更多地取决于源繁殖地的巢丰度，而不是像以前认为的那样取决于短期气候变化引起的随机过程。
After hatching, juveniles of most sea turtle species undertake long migrations across ocean basins and remain in oceanic habitats for several years. Assessing population abundance and demographic parameters during this oceanic stage is challenging. Two long-recognized deficiencies in population assessment are (i) reliance on trends in numbers of nests or reproductive females at nesting beaches and (ii) ignorance of factors regulating recruitment to the early oceanic stage. To address these critical gaps, we examined 15 years of standardized loggerhead sighting data collected opportunistically by fisheries observers in the Azores archipelago. From 2001 to 2015, 429 loggerheads were sighted during 67,922 km of survey effort. We used a model-based approach to evaluate the influence of environmental factors and present the first estimates of relative abundance of oceanic-stage juvenile sea turtles. During this period, relative abundance of loggerheads in the Azores tracked annual nest abundance at source rookeries in Florida when adjusted for a 3-year lag. This concurrence of abundance patterns indicates that recruitment to the oceanic stage is more dependent on nest abundance at source rookeries than on stochastic processes derived from short term climatic variability, as previously believed.
DOI：
10.1080/01621459.2016.1180986
发表时间：
2016-12-01
影响因子：
3.7
作者：
Wood, Simon N.;Pya, Natalya;Saefken, Benjamin
通讯作者：
Saefken, Benjamin