佛罗里达混合用途海滩上影响红海龟和绿海龟繁殖成功的因素

IF 0.9 4区 生物学 Q3 ZOOLOGY Chelonian Conservation and Biology Pub Date : 2016-12-30 DOI:10.2744/CCB-1206.1
Rebekah J Lindborg, Emily Neidhardt, B. Witherington, J. R. Smith, A. Savage
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引用次数: 10

摘要

虽然海龟繁殖成功率的估计对于量化种群状况和威胁的影响很重要,但发表的这些比率的代表性值很少。大多数关于孵化成功的评估都是作为实验分析的一部分进行的,这些分析在时空上并不代表一个种群。为了填补这一空白,我们分析了11年时间序列(2004-2014)的海龟孵化和出现成功数据,这些数据来自佛罗里达州7公里长的海滩,由混合郊区和度假/娱乐用地支持。我们的分析检查了与这些巢穴孵化相关的潜在蛋死亡因素。数据集包括有代表性的红海龟(Caretta Caretta)巢(n = 2543,占同期所有巢的34.4%)和绿海龟(Chelonia mydas)巢(n = 972,占所有巢的44.7%)。红海龟年平均孵化成功率为68.6%±35.5%,绿海龟年平均孵化成功率为59.6%±39.5%,红海龟年平均孵化成功率为66.6%±35.7%,绿海龟年平均孵化成功率为57.0%±39.1%。在我们的研究海滩上,哺乳动物的捕食率对整体孵化成功趋势的影响很小,因为捕食事件的样本(11年的0.3%)太小而无法分析。在整个研究期间,热带风暴和飓风对孵化成功率趋势有显著影响,这是基于每种物种的孵化成功率与孵化期间最高波高、孵化期间平均波高和研究巢穴遇到2米或更高波的天数之间的负相关关系。在热带气旋期间,每个物种的孵化和羽化成功率最低,这与完全摧毁巢穴的数量增加相对应。与佛罗里达其他海滩的红海龟和绿海龟巢穴相比,我们研究地点的巢穴孵化和出现的成功率更高。这些繁殖成功的评估是在一个经常使用的度假海滩进行的保护计划的一部分,保护行动包括警惕巢死亡因素,并向海滩游客宣传,目的是在海龟筑巢季节促进良心行为。
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Factors Influencing Loggerhead (Caretta caretta) and Green Turtle (Chelonia mydas) Reproductive Success on a Mixed Use Beach in Florida
Abstract Although estimates of sea turtle reproductive success are important to quantify population status and effects from threats, published representative values of these rates are rare. Most assessments involving hatching success have taken place as part of experimental analyses that did not spatiotemporally represent a population. To fill this gap, we analyzed an 11-yr time series (2004–2014) of sea turtle hatching and emergence success data for a 7-km stretch of Florida beach backed by mixed suburban and resort/recreational land use. Our analysis examined potential egg-mortality factors associated with the incubation of these nests. The data set included representative sampling of loggerhead (Caretta caretta) nests (n = 2,543, 34.4% of all nests made during the period) and green turtle (Chelonia mydas) nests (n = 972, 44.7% of all nests). Mean (± SD) annual hatching success was 68.6% ± 35.5% for loggerheads and 59.6% ±  39.5% for green turtles, and mean emergence success was 66.6% ± 35.7% for loggerheads and 57.0% ± 39.1% for green turtles. Mammalian predation rates had little effect on overall hatching success trends on our study beach with the sample of predation events (0.3% over 11 yrs) too small to analyze. There were significant effects from tropical storms and hurricanes on hatching success trends throughout the study period, based on negative correlations between hatching success for each species and highest wave height incurred during incubation, mean wave height during incubation, and the number of days that study nests incurred 2 m or higher waves. Hatching and emergence success for each species were lowest during tropical cyclones, which corresponded with an increased number of complete nest wash-outs. Nests within our study site had higher hatching and emergence success rates compared with loggerhead and green turtle nests at other Florida beaches. These assessments of reproductive success are part of a conservation program undertaken at an actively used resort beach, with conservation actions that included vigilance for nest mortality factors and outreach to beachgoers with the aim to promote conscientious behavior during the sea turtle nesting season.
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来源期刊
CiteScore
1.70
自引率
14.30%
发文量
17
审稿时长
>12 weeks
期刊介绍: Chelonian Conservation and Biology is a biannual peer-reviewed journal of cosmopolitan and broad-based coverage of all aspects of conservation and biology of all chelonians, including freshwater turtles, marine turtles, and tortoises. Manuscripts may cover any aspects of turtle and tortoise research, with a preference for conservation or biology. Manuscripts dealing with conservation biology, systematic relationships, chelonian diversity, geographic distribution, natural history, ecology, reproduction, morphology and natural variation, population status, husbandry, community conservation initiatives, and human exploitation or conservation management issues are of special interest.
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