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Threshold to maturity in a long-lived reptile: interactions of age, size, and growth

机译：长寿爬行动物的成熟阈值：年龄，大小和生长的相互作用

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摘要

Thresholds to sexual maturity-either age or size-are critical life history parameters. Usually investigated in short-lived organisms, these thresholds and interactions among age, size, and growth are poorly known for long-lived species. A 34-year study of captive green turtles (Chelonia mydas) that followed individuals from hatching to beyond maturity provided an opportunity to evaluate these parameters in a long-lived species with late maturity. Age and size at maturity are best predicted by linear growth rate and mass growth rate, respectively. At maturity, resource allocation shifts from growth to reproductive output, regardless of nutrient availability or size at maturity. Although captive turtles reach maturity at younger ages than wild turtles, the extensive variation in captive turtles under similar conditions provides important insights into the variation that would exist in wild populations experiencing stochastic conditions. Variation in age/size at maturity should be incorporated into population models for conservation and management planning.
机译：性成熟的阈值（年龄或大小）是生活史的关键参数。通常在短命生物中进行研究，这些阈值以及年龄，大小和生长之间的相互作用对于长寿命物种知之甚少。一项针对圈养绿海龟（Chelonia mydas）的研究长达34年，该研究跟踪了从孵化到成熟的个体，为评估具有较长成熟期的长寿命物种提供了机会。最好分别通过线性增长率和质量增长率来预测成熟时的年龄和大小。在成熟时，无论养分的供应量或成熟时的大小，资源分配都从增长转移到生殖产出。尽管圈养海龟比野生海龟要年轻得多，但在相似条件下圈养海龟的广泛变异为了解随机条件下野生种群的变异提供了重要的见识。成熟期年龄/大小的变化应纳入种群模型，以进行保护和管理规划。

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  • 来源
    《Marine biology》 |2013年第3期|607-616|共10页
  • 作者

    Karen A. Bjorndal; Joe Parsons; Walter Mustin; Alan B. Bolten;

  • 作者单位

    Department of Biology, Archie Carr Center for Sea Turtle Research, University of Florida, Gainesville, FL 32611, USA;

    Cayman Turtle Farm, Grand Cayman KY1-1301, Cayman Islands;

    Cayman Turtle Farm, Grand Cayman KY1-1301, Cayman Islands;

    Department of Biology, Archie Carr Center for Sea Turtle Research, University of Florida, Gainesville, FL 32611, USA;

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