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首页> 外文期刊>Aquatic Biology >Hatching and emergence success in green turtle Chelonia mydas nests in the Galápagos Islands
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Hatching and emergence success in green turtle Chelonia mydas nests in the Galápagos Islands

机译：加拉帕戈斯群岛绿海龟Chelonia mydas巢中的孵化和出苗成功

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ABSTRACT: The interactions of numerous abiotic and biotic factors experienced by sea turtle embryos during incubation affect their survival. In this study we determined the hatching and emergence success of green turtles Chelonia mydas from nests on 4 beaches on the Galápagos Islands, one of the most important rookeries for green turtles in the eastern Pacific Ocean. Mean (±SD) hatching and emergence success for the 1039 nests examined were 46.0 ± 33.4 and 45.6 ± 33.4%, respectively. These values are relatively low compared to other green turtle populations worldwide. We evaluated the effects of beach, year, day of oviposition, carapace length and width of female, nest position, nest habitat, and nest chamber depth on hatching and emergence success with binomial generalized additive models with fixed effects. We found variation in hatching and emergence success was significant among beaches, years, day of oviposition, and nest habitat. Predation by feral pigs and beetles and destruction of earlier nests by nesting females were the most important causes of embryo mortality. Efforts to keep threats at minimum levels, particularly controlling pigs near Isabela beaches, should be considered a major conservation objective. This study highlights important differences among beaches within a rookery and emphasizes the need to continue improving management strategies to protect green turtles and their critical habitats. Quantitative information provided here can be used as a basis for long-term studies in the Galápagos and for comparison to other sea turtles rookeries.
机译：摘要：孵化过程中海龟胚胎经历的许多非生物和生物因素的相互作用会影响其生存。在这项研究中，我们确定了加拉帕戈斯群岛（GalápagosIslands）上4个海滩上的巢中绿海龟（Chelonia mydas）的孵化和繁殖成功的原因，加拉帕戈斯群岛是东太平洋最重要的绿海龟群之一。所检查的1039个巢的平均（±SD）孵化率和出苗成功率分别为46.0±33.4和45.6±33.4％。与全球其他绿海龟种群相比，这些数值相对较低。我们使用固定效应的二项式广义加性模型，评估了海滩，产卵年，产卵日，甲壳的长度和雌性的宽度，巢的位置，巢的栖息地和巢室的深度对孵化和出苗成功的影响。我们发现，在海滩，年份，产卵日和巢地之间，孵化率和出苗成功率存在显着差异。野猪和甲虫的捕食以及雌性筑巢对早期巢的破坏是造成胚胎死亡的最重要原因。将威胁保持在最低水平的努力，特别是控制伊莎贝拉海滩附近的猪，应被视为主要的保护目标。这项研究着重说明了鸟巢内海滩之间的重要差异，并强调需要继续改善管理策略，以保护绿海龟及其关键栖息地。此处提供的定量信息可以用作在加拉帕戈斯群岛进行长期研究以及与其他海龟群进行比较的基础。

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