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首页> 外文期刊>Marine biology >Ecology of loggerhead marine turtles Caretta caretta in a neritic foraging habitat: movements, sex ratios and growth rates
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Ecology of loggerhead marine turtles Caretta caretta in a neritic foraging habitat: movements, sex ratios and growth rates

机译：觅食栖息地中海龟的生态：运动，性别比和增长率

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Much is still to be learned about the spatial ecology of foraging marine turtles, especially for juveniles and adult males which have received comparatively little attention. Additionally, there is a paucity of ecological information on growth rates, size and age at maturity, and sex ratios at different life stages; data vital for successful population modelling. Here, we present results of a long-term (2002-2011) study on the movements, residency, growth and sex ratio of loggerhead turtles {Caretta caretta) in Amvrakikos Gulf (39°0'N 21°0'E), Greece, using satellite telemetry (N = 8) and ongoing capture-mark-recapture (CMR; N = 300 individuals). Individuals encountered at sea ranged from large juvenile to adult (46.2-91.5 cm straight carapace length) and demonstrated growth rates within published norms (<2.7 cm yr~(-1)) that slowed with increasing body size. We revealed that an unexpectedly high proportion of animals were male (>44 % of captures above 65 cm straight carapace length), compared to region-wide female-biased hatchling production, indicating sex-biased survival or possible behavioural drivers for likelihood of capture in the region. Satellite tracking confirmed that some turtles establish discrete, protracted periods of residency spanning more than 1 year, whilst others migrated away from the site. These findings are underlined by CMR results with individual capture histories spanning up to 7 years, and only 18 % of individuals being recaptured.
机译：关于觅食海龟的空间生态学，尤其是对于未受到足够关注的少年和成年雄性，其空间生态学仍有很多知识。此外，缺乏有关增长率，成熟时的大小和年龄以及不同生命阶段的性别比的生态信息；数据对于成功进行人口建模至关重要。在这里，我们展示了对希腊Amvrakikos海湾（39°0'N 21°0'E）的（Caretta caretta）的迁徙，居住，生长和性别比的长期研究结果（2002-2011年） ，使用卫星遥测（N = 8）和正在进行的捕获标记捕获（CMR; N = 300个人）。在海上遇到的个体从大型的少年到成年个体（直甲的长46.2-91.5厘米）不等，并表现出在已公布的规范（<2.7 cm yr〜（-1））内的增长速度，随着体型的增大而减慢。我们发现，与整个地区偏爱雌性孵化的孵化鱼相比，雄性动物出乎意料的高比例是雄性动物（> 65％直甲壳长度超过65％的捕获），表明性别偏见的存活或可能的行为诱因该区域。卫星跟踪证实，一些海龟在1年以上的时间里建立了离散的长期居住地，而另一些海龟则从该地点迁出。 CMR结果强调了这些发现，个体捕获历史长达7年，只有18％的个体被捕获。

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  • 来源
    《Marine biology》 |2013年第3期|519-529|共11页
  • 作者

    ALan F. Rees; Dimitris Margaritoulis; Robert Newman; Thomas E. Riggall; Paul Tsaros; Judith A. Zbinden; Brendan J. Godley;

  • 作者单位

    ARCHELON, the Sea Turtle Protection Society of Greece, Solomou 57, 104 32 Athens, Greece,Marine Turtle Research Group, Centre for Ecology and Conservation, University of Exeter, Cornwall Campus, Penryn, Cornwall TRIO 9EZ, UK;

    ARCHELON, the Sea Turtle Protection Society of Greece, Solomou 57, 104 32 Athens, Greece;

    ARCHELON, the Sea Turtle Protection Society of Greece, Solomou 57, 104 32 Athens, Greece;

    ARCHELON, the Sea Turtle Protection Society of Greece, Solomou 57, 104 32 Athens, Greece;

    ARCHELON, the Sea Turtle Protection Society of Greece, Solomou 57, 104 32 Athens, Greece;

    Marine Turtle Research Group, Centre for Ecology and Conservation, University of Exeter, Cornwall Campus, Penryn, Cornwall TRIO 9EZ, UK;

    Marine Turtle Research Group, Centre for Ecology and Conservation, University of Exeter, Cornwall Campus, Penryn, Cornwall TRIO 9EZ, UK;

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