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首页> 外文期刊>Marine ecology progress series >Determinate or indeterminate growth? Revisiting the growth strategy of sea turtles
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Determinate or indeterminate growth? Revisiting the growth strategy of sea turtles

机译：确定或不确定增长？重新审视海龟的生长策略

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Traditionally, growth can be either determinate, ceasing during the natural lifespan of individuals, or indeterminate, persisting throughout life. Although indeterminate growth is a widely accepted strategy and believed to be ubiquitous among long-lived species, it may not be as common as previously thought. Sea turtles are believed to be indeterminate growers despite the paucity of long-term studies into post-maturity growth. In this study, we provide the first temporal analysis of post-maturity growth rates in wild living sea turtles, using 26 yr of data on individual measurements of females nesting in Cyprus. We used generalised additive/lineai mixed models to incorporate multiple growth measurements for each female and model post-maturity growth over time. We found post-maturity growth to persist in green Chelonia mydas and loggerhead Caretta caretta turtles, with growth decreasing for approximately 14 yr before plateauing around zero for a further decade solely in green turtles. We also found growth to be independent of size at sexual maturity in both species. Additionally, although annual growth and compound annual growth rates were higher in green turtles than in loggerhead turtles, this difference was not statistically significant. While indeterminate growth is believed to be a key life-history trait of ectothermic vertebrates, here, we provide evidence of determinate growth in green and loggerhead turtles and suggest that determinate growth is a life-history trait shared by cheloniid species. Our results highlight the need for long-term studies to refine life-history models and further our understanding of ageing and longevity of wild sea turtles for conservation and management.
机译：传统上，增长可以是决定性的，在个体的自然寿命中会停止，也可以是不确定的，在整个生命中持续存在。尽管无限增长是一种广为接受的策略，并且被认为在长寿物种中无处不在，但它可能不像以前想象的那么普遍。尽管对成年后生长的长期研究很少，但海龟仍被认为是不确定的养殖者。在这项研究中，我们使用26年有关在塞浦路斯筑巢的雌性个体测量的数据，首次提供了野生活海龟成熟后生长率的时间分析。我们使用广义的加性/线性混合模型对每位女性进行多次生长测量，并对模型随时间的增长进行模型化。我们发现，绿色的Chelonia mydas和头的Caretta caretta龟的成熟后持续增长，生长减少了约14年，然后仅在绿龟中又稳定在零附近，持续了十年。我们还发现，两个物种的性成熟都取决于其大小的增长。此外，尽管绿海龟的年增长率和复合年增长率都高于海龟，但这种差异在统计学上并不显着。虽然不确定的增长被认为是外热脊椎动物的关键生命史特征，但在这里，我们提供了绿色和龟的决定性生长证据，并建议确定的增长是螯虾物种共有的生命史特征。我们的结果强调需要进行长期研究，以完善生活史模型，并进一步了解野生海龟的衰老和寿命，以进行保护和管理。

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