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首页> 外文期刊>Chelonian conservation and biology >Olfaction as a Cue for Nest-Site Choice in Turtles
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Olfaction as a Cue for Nest-Site Choice in Turtles

机译：嗅觉作为海龟筑巢地点选择的线索

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摘要

Nest-site choice in turtles has a demonstrated impact on their fitness. Previous studies of nest-site choice have focused on environmental factors potentially affecting that choice (e.g., temperature, insolation, soil type, or moisture). Observations of nesting of painted turtles (Chrysemys picta) at the Crescent Lake National Wildlife Refuge in the Nebraska Sandhills suggest that females might use olfactory cues (specifically odors of other nesting females) to choose nest sites. We tested this hypothesis indirectly by using the nearest neighbor (nest) distance algorithm in ArcMap 10.1. Our results for nests in 2012-2014 were mixed, with nesting at some sites, in some years, and by some turtles occurring nonrandomly, in very close proximity to previous nests. Preliminary experimental data from 2015 using urine-treated sites in primary nesting areas also suggested that females showed more interest in those sites than sites moistened with equal amounts of water. These data provide some support for the use of nest odor as an important cue for nest-site choice in turtles, but they are insufficient to reject the possibility of the simultaneous use of other fine-scale environmental cues.
机译：乌龟巢穴的选择对其适应性产生了明显影响。先前关于巢穴选择的研究集中于可能影响选择的环境因素（例如温度，日照，土壤类型或湿度）。在内布拉斯加州桑德希尔斯的新月湖国家野生动物保护区的彩绘海龟（Chrysemys picta）筑巢的观察表明，雌性可能会使用嗅觉提示（特别是其他筑巢雌性的气味）来选择筑巢地点。我们通过使用ArcMap 10.1中的最近邻（巢）距离算法间接验证了该假设。我们对2012-2014年筑巢的结果喜忧参半，有些年份，在某些地点筑巢，还有一些海龟非随机地发生，非常接近以前的筑巢。从2015年开始的初步实验数据显示，在主要筑巢区使用尿液处理过的地点，与在等量的水润湿的地点相比，女性对这些地点表现出更大的兴趣。这些数据为使用巢气味作为海龟筑巢地点选择的重要线索提供了一定的支持，但不足以拒绝同时使用其他精细规模环境线索的可能性。

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