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首页> 外文期刊>Marine ecology progress series >Foraging ecology and diet selection of juvenile green turtles in the Bahamas: insights from stable isotope analysis and prey mapping
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Foraging ecology and diet selection of juvenile green turtles in the Bahamas: insights from stable isotope analysis and prey mapping

机译：在巴哈马觅食生态学和幼龟的饮食选择：稳定同位素分析和猎物制图的见解

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Species' foraging choices influence their somatic growth rates, age at maturity, and time spent in vulnerable early life stages. Thus, differences in population demographics are often attributed to variability either in diet type, quality, and/or quantity ingested. Knowledge of diet selection, though currently limited, can enhance our understanding of the roles of marine turtles in marine ecosystems and, at a finer scale, elucidate how nutrition and diet influence their growth and productivity. To investigate this relationship, we coupled stable isotope analysis with a diet preference index to provide insights into the selection and plasticity of juvenile green turtle Chelonia mydas diet. The study was conducted at 2 sites (Bonefish Hole and South Bimini) in Bimini, Bahamas, in 2016. Habitat surveys were conducted to gather habitat data and determine resource availability. A dichotomy in diet was found between the sites: at Bonefish Hole, turtles exhibited a more generalist omnivorous diet, selecting for sessile filter feeders and green algae, whereas turtles in South Bimini had a more specialist herbivorous diet, primarily consuming seagrasses and selecting for red algae, when available. The foraging dichotomy found in this study expands our understanding of the spatial differences in green turtle biology in the Bahamas and provides novel information for turtle foraging in Bimini. Knowledge about differences in intra-specific diet, with a focus on diet selection and potential drivers, can shed light on the factors that influence critical life history traits and ultimately inform species management.
机译：物种的觅食选择会影响它们的体细胞生长速率，成熟年龄以及在脆弱的生命早期所花费的时间。因此，人口统计学上的差异通常归因于饮食类型，质量和/或摄入量的差异。关于饮食选择的知识虽然目前还很有限，但可以增进我们对海龟在海洋生态系统中的作用的了解，并在更精细的范围内阐明营养和饮食如何影响其生长和生产力。为了研究这种关系，我们将稳定同位素分析与饮食偏好指数相结合，以提供对青少年绿海龟Chelonia mydas饮食的选择和可塑性的见解。该研究于2016年在巴哈马Bimini的2个地点（Bonefish Hole和South Bimini）进行。进行了栖息地调查，以收集栖息地数据并确定资源可用性。在两地之间发现了饮食上的二分法：在Bonefish Hole，海龟表现出更加杂食性，选择无柄滤食动物和绿藻，而南比米尼岛的海龟则具有更专业的草食性，主要是食用海草并选择红色。藻类（如果有）。本研究中发现的觅食二分法扩大了我们对巴哈马绿海龟生物学中空间差异的理解，并为比米尼岛的海龟觅食提供了新颖的信息。有关种内饮食差异的知识（着重于饮食选择和潜在驱动因素）可以阐明影响关键生命史特征并最终为物种管理提供依据的因素。

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