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首页> 外文期刊>Marine biology >Long-term growth and survival dynamics of green turtles (Chelonia mydas) at an isolated tropical archipelago in Brazil
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Long-term growth and survival dynamics of green turtles (Chelonia mydas) at an isolated tropical archipelago in Brazil

机译：巴西一个孤立的热带群岛上绿海龟（Chelonia mydas）的长期生长和生存动态

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摘要

For effective management of species of conservation concern, knowledge of life history parameters is essential. Here, we present the results of one of the longest ongoing capture-mark-recapture studies of juvenile green turtles {Chelonia mydas) worldwide. From 1988 to 2013, 1,279 individual turtles were tagged in Fernando de Noronha, Brazil (3°51'S, 32°25'W). The size distribution at first capture varied between 27 and 87 cm (mean ± SD 47.9 ±11.3 cm) curved carapace length (CCL). Median residence time was 2.4 year (with long-term residence of up to 11.2 year), with individuals exhibiting some site fidelity within the Archipelago. Turtles at this site are slow growing (mean 2.6 ± 1.6 cm year~(-1); range -0.9 to 7.9 cm year~(-1); n = 1,022), with a non-monotonic expected growth rate function and a peak in growth rates occurring at 50-60 cm CCL. At these rates, turtles in Fernando de Noronha would need to spend ca. 22 years to grow from 30 to 87 cm CCL and even longer to reach minimum adult breeding size. A Cormack-Jolly-Seber model was used to estimate the apparent survival of the residents and recapture probabilities (2001-2012). The estimated annual abundance ranged from 420 to 1,148 individuals. Confidence around abundance estimates was low, and there was no significant trend over the period, despite steep recent increases at the major source rookery. Slow growth and stable stocking numbers may be suggestive of density-dependent regulation having taken place following initial population recovery that occurred prior to the current study.
机译：为了有效地管理保护物种，必须了解生命史参数。在这里，我们介绍了全球范围内进行时间最长的捕获未成年绿海龟（Chelonia mydas）之一的结果。从1988年到2013年，在巴西的费尔南多·迪诺罗尼亚群岛（3°51'S，32°25'W）标记了1,279只海龟。第一次捕获时的大小分布在弯曲的甲壳长度（CCL）的27至87厘米（平均±SD 47.9±11.3厘米）之间变化。中位居留时间为2.4年（长期居留时间最长为11.2年），个人在群岛内表现出一定的站点忠诚度。该地点的海龟生长缓慢（平均2.6±1.6 cm年〜（-1）；范围-0.9到7.9 cm年〜（-1）； n = 1,022），具有非单调的预期增长率函数，并且具有峰值生长速率在50-60 cm CCL时发生。以这些速度，费尔南多·迪诺罗尼亚群岛的海龟将需要花费大约。从30厘米的覆铜板生长到87厘米的覆铜板需要​​22年，甚至更长的时间才能达到成年繁殖的最小体型。使用Cormack-Jolly-Seber模型估计居民的表观生存率和夺回概率（2001-2012年）。估计的年度丰度为420至1,148个人。尽管最近主要来源群体的数量急剧增加，但对丰度估计值的信心仍很低，并且在此期间没有显着趋势。缓慢的生长和稳定的种群数量可能暗示了在当前研究之前发生的初始种群恢复后发生的密度依赖性调节。

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  • 来源
    《Marine biology》 |2015年第1期|111-122|共12页
  • 作者

    Liliana P. Colman; Ana Rita C. Patricio; Andrew McGowan; Armando J. B. Santos; Maria Angela Marcovaldi; Claudio Bellini; Brendan J. Godley;

  • 作者单位

    Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Cornwall Campus, Penryn, UK,Fundacao Pro-TAMAR, Rua Rubens Guelli 134 sala 307 - Itaigara, Salvador, BA 41815-135, Brazil;

    Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Cornwall Campus, Penryn, UK;

    Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Cornwall Campus, Penryn, UK;

    Fundacao Pro-TAMAR, Rua Rubens Guelli 134 sala 307 - Itaigara, Salvador, BA 41815-135, Brazil;

    Fundacao Pro-TAMAR, Rua Rubens Guelli 134 sala 307 - Itaigara, Salvador, BA 41815-135, Brazil;

    Projeto TAMAR-ICMBio, CLBI-Setor Oeste, Avenida Joaquim Patricio 4000, Distrito Litoral-Pium, Parnamirim, RN 59160-530, Brazil;

    Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Cornwall Campus, Penryn, UK;

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