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首页> 外文期刊>Chelonian conservation and biology >Kemp's Ridley Sea Turtle Saga and Setback: Novel Analyses of Cumulative Hatchlings Released and Time-Lagged Annual Nests in Tamaulipas, Mexico
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Kemp's Ridley Sea Turtle Saga and Setback: Novel Analyses of Cumulative Hatchlings Released and Time-Lagged Annual Nests in Tamaulipas, Mexico

机译：肯普（Kemp）的里德利（Ridley）海龟传奇和挫折：墨西哥塔毛利帕斯（Tamaulipas）释放的累计孵化小鱼和有时间滞后的年度巢的新颖分析

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摘要

Kemp's ridley (Lepidochelys kempii) is the most endangered of the sea turtles. Its female population in the Gulf of Mexico suffered a major setback sometime between the ends of nesting seasons in 2009 and 2010. Prior to that, annual nests (i.e., clutches laid by multiple year-classes of nesters) at the female population's index beach in Tamaulipas, Mexico were increasing exponentially, the result of more than 4 decades of cumulative conservation efforts on land and at sea. Annual nests dropped 35.4% in 2010 and remained well below predicted levels through 2014, and annual hatchlings released (both sexes combined) also were lower in 2010-2014 compared with those in 2009. We conducted novel analyses of an available 1966-2014 time series of annual nests and annual hatchlings released on the index beach. We examined 1) the relationship between time-lagged annual nests during years 1986-2014 and cumulative hatchlings released by years 1976-2004, respectively, assuming female minimum age at maturity of 10 yrs, and 2) the time-series of time-lagged annual nests during 1986-2014 divided by cumulative hatchlings released by 1976-2004, respectively, under the same assumption. Both metrics showed extraordinary downward departures in 2010-2014, instead of expected increases. Although causes of the population's setback have not been determined with certainty, we suggest that the most expedient way to restore this population's growth would be to translocate more clutches to protective corrals, leaving fewer in situ where their survival is reduced. It could take at least 10 yrs before results of such a change in conservation practice become evident.
机译：肯普的里德利（Lepidochelys kempii）是最濒危的海龟。在2009年至2010年筑巢季节结束之间的某个时候，它在墨西哥湾的雌性种群遭受了重大挫折。在此之前，在2009年雌性种群的指数海滩上，每年筑有巢穴（即，由多个年级筑巢者筑成的巢穴）。墨西哥Tamaulipas的土地和海上累积保护工作已进行了4年多，这是其成倍增长的结果。 2010年的年孵化率下降了35.4％，到2014年仍远低于预期水平，2010-2014年的年孵化率（包括性别）也低于2009年。我们对1966-2014年的可用时间序列进行了新颖的分析索引海滩上释放的年度巢穴和年度孵化量。我们研究了1）假设女性最低年龄为10岁，而1986-2014年间有时间滞后的年巢与1976-2004年间所释放的累计孵化量之间的关系，以及2）时滞的时间序列在相同的假设下，1986-2014年间的年度巢穴分别除以1976-2004年间的累积孵化量。两项指标均显示2010-2014年出现异常下降，而不是预期的增长。尽管尚未确定人口受挫的原因，但我们建议恢复该人口增长的最便捷方法是将更多的抓钩转移到保护性畜栏上，而在原地生存的地方减少了。这样的保护实践变化的结果变得明显可能需要至少10年的时间。

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