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Loggerhead Nesting in the Northern Gulf of Mexico: Importance of Beach Slope to Nest Site Selection in the Mississippi Barrier Islands

机译:墨西哥北部海湾的巢:在密西西比河屏障群岛中海滩坡度对巢址选择的重要性

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摘要

Here we describe the effects of beach morphological features on loggerhead (Caretta caretta) nesting behavior on the barrier islands of the north-central Gulf of Mexico. Our results show that loggerhead crawl length decreases as beach slope increases, and our data comparing nest crawls (resulting in egg laying) versus false crawls (emergence onto the beach without laying eggs) suggest that beach slope and crawl length differ between the crawl types but elevation does not. We infer that loggerheads cue in to beach slope to reach a perceived elevation with reduced risk of inundation, crawling longer distances on flatter slopes compared with shorter distances on steep slopes, but that after this elevation is reached, other environmental variables may ultimately factor into the decision to lay eggs.
机译:在这里,我们描述了海滩形态特征对墨西哥中北部海湾屏障岛上的(Caretta caretta)筑巢行为的影响。我们的结果表明,随着海滩坡度的增加,头爬虫的长度会减小,我们的数据将巢状爬虫(导致产卵)与错误爬虫​​(出现在海滩上而没有产卵)进行比较,这表明海滩坡度和爬虫长度在爬虫类型之间有所不同,但海拔没有。我们推断,头进入海滩坡面会达到可感知的海拔高度,从而降低了洪水泛滥的风险,与陡坡上的距离相比,平坡上的爬行距离更长,但达到此海拔高度后,其他环境变量最终可能会决定产卵。

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  • 来源
    《Chelonian conservation and biology》 |2017年第2期|250-254|共5页
  • 作者单位

    North Carolina State Univ, Dept Appl Ecol, Campus Box 7617, Raleigh, NC 27695 USA;

    NOAA, Southeast Fisheries Sci Ctr, Natl Marine Fisheries Serv, 75 Virginia Dr, Miami, FL 33149 USA;

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