The nesting environment is known to significantly affect the breeding success of sea turtles. Sandy beach habitats, where sea turtles nest, are frequently affected by high tides and waves on Ecuadorian beaches during windy events. The objectives of this study were: i) to determine the variables that affect nest site selection by two sea turtle species, Eretmochelys imbricata and Chelonia mydas in Ecuador, ii) to compare features of the nesting places of successful vs. failed clutches and iii) to quantify the changes in the intensity and frequency of the tide and its relation to the loss of eggs for the last 10 years. We monitored 15 hawksbill and 26 green turtle nests for two years on five beaches on the mainland coast of Ecuador. The results show that the presence of a dune scarps negatively affected successful nesting, while the proportion of eggs lost was positively associated with road distance, sea distance and nest depth. In addition, the results showed that the loss of eggs was greater for the green turtle, the presence of dune scarps and tides. Finally, using the data available on hatching success over the last 10 years we found a significant relationship between the intensity of the tides and the loss of eggs during this period. We conclude that nest site selection and hatching success vary with beach microhabitats and therefore local information is needed to protect suitable habitats.

Medical therapeutic experiment with retrospective case-control analyses

中文翻译：

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厄瓜多尔海龟筑巢失败-海龟筑巢损失的原因：潮汐的作用

众所周知，筑巢环境会极大地影响海龟的繁殖成功。在刮风的事件中，海龟筑巢的沙滩栖息地经常受到厄瓜多尔海滩上的高潮和海浪的影响。这项研究的目的是：i）确定影响两种海龟物种（Eretmochelys imbricata和Chelonia mydas）选择巢位的变量。在厄瓜多尔，ii）比较成功和失败离合器的筑巢地点的特征，iii）量化最近10年潮汐强度和频率的变化及其与鸡蛋损失的关系。我们在厄瓜多尔大陆海岸的五个海滩上监视了15头b和26只绿海龟巢，为期两年。结果表明，沙丘的存在对成功筑巢有负面影响，而丢失的卵的比例与道路距离，海面距离和巢深度呈正相关。另外，结果表明，绿龟，沙丘和潮汐的存在使卵的损失更大。最后，使用过去10年中成功孵化的可用数据，我们发现在此期间，潮汐强度与鸡蛋损失之间存在显着的关系。我们得出的结论是，巢穴的选择和孵化成功率会随海滩微生境的不同而变化，因此需要当地信息来保护合适的栖息地。

回顾性病例对照分析的药物治疗实验