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首页> 外文期刊>Chelonian conservation and biology >Declining Reproductive Parameters Highlight Conservation Needs of Loggerhead Turtles (Caretta caretta) in the Northern Gulf of Mexico
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Declining Reproductive Parameters Highlight Conservation Needs of Loggerhead Turtles (Caretta caretta) in the Northern Gulf of Mexico

机译：生殖参数的下降突出了墨西哥北部海湾的ger（Caretta caretta）的养护需求

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摘要

Marine turtles in the Gulf of Mexico are at risk due to many anthropogenic threats including habitat degradation, commercial fishing, and petroleum activities. The severity of this risk was made apparent in 2010 with the occurrence of the Deepwater Horizon oil spill. The objectives of this study were to assess long-term trends in abundance and reproductive parameters for this genetically distinct nesting group. From 1994 to 2010, morning surveys were conducted along 3 beaches on the St Joseph Peninsula, Florida, including within our primary study site on Cape San Bias. Nest abundance on all 3 beaches declined by at least 47% (p < 0.01). Mean nesting success on Cape San Bias was 40% and also declined (p = 0.002). Mean clutch size was 108 and mean emergence success was 58%. Throughout the study there were no changes in clutch size and emergence success. We found that nesting characteristics for the northern Gulf of Mexico subpopulation appear similar to those from other loggerhead turtle nesting groups in the southeastern United States in some ways, such as emergence success, timing of peak nesting, and incubation duration and different in other ways such as nesting success. Variation in some of the parameters may indicate turtles among the different nesting groups experience different environmental conditions. The severity of declines in nest abundance and the low nesting success reported for this small subpopulation suggest potentially serious consequences for this nesting group.
机译：由于许多人为威胁，包括栖息地退化，商业捕鱼和石油活动，墨西哥湾的海龟正处于危险之中。随着Deepwater Horizo​​n漏油事件的发生，这种风险的严重性在2010年变得显而易见。这项研究的目的是评估这一遗传上不同的筑巢群体的丰度和生殖参数的长期趋势。从1994年到2010年，上午调查是在佛罗里达州圣约瑟夫半岛的3个海滩上进行的，包括在我们位于圣比亚斯角的主要研究地点内。所有3个海滩上的巢度都下降了至少47％（p <0.01）。 Cape San Bias上的平均筑巢成功率为40％，并且也下降了（p = 0.002）。平均离合器尺寸为108，平均弹射成功率为58％。在整个研究过程中，离合器的大小和出苗成功率均没有变化。我们发现，墨西哥湾北部亚种群的筑巢特征在某些方面看起来与美国东南部其他龟筑巢组的相似，例如出苗成功，高峰筑巢的时间，潜伏期以及在其他方面的不同。筑巢成功。其中一些参数的变化可能表明不同巢组中的海龟经历了不同的环境条件。巢丰富度下降的严重程度和针对这种小亚群报道的低筑巢成功率表明，该筑巢群体可能会遭受严重后果。

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