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首页> 外文期刊>Ocean & coastal management >Considering diamond-backed terrapin (Malaclemys terrapin) nesting habitat and reproductive productivity in the restoration of Gulf of Mexico coastal ecosystems
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Considering diamond-backed terrapin (Malaclemys terrapin) nesting habitat and reproductive productivity in the restoration of Gulf of Mexico coastal ecosystems

机译：在恢复墨西哥湾沿海生态系统的过程中考虑到以钻石为支撑的龟（Malaclemys terrapin）筑巢栖息地和生殖生产力

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摘要

Diamond-backed terrapins (Malaclemys terrapin) are coastally distributed between south central Texas in the Gulf of Mexico along the Gulf and Atlantic Coast north through Massachusetts. Throughout their range many different biotic and abiotic factors have been shown to influence terrapin abundance, distribution and nesting success. Louisiana Department of Wildlife and Fisheries (LDWF) implemented a multi-year (2013-2015) project which evaluated diamond-backed terrapin nesting ecology along Louisiana's coastline, principally within the Deltaic Plain. We focused on identifying nest site locations, nest predators and predation rates, nest surface characteristics, nest depth, clutch size, egg morphometrics, nest and nest survivorship. Our results indicate that terrapin nesting occurs coast-wide in locations where suitable nesting substrates exist. Nests are laid in open areas and beneath dense vegetative cover with surface slopes in all orientations. Depredation rates range between 50 and 100 percent depending on nesting beach location. Intact clutch size averages 6.5 eggs and varies between one and 15 eggs. Statewide, average egg morphometrics are: mass 10.6 g, length 36.9 mm and width 23.6 mm. Average nest ceiling depth is 7.7 cm and average nest floor depth is 11.8 cm. Seventy-six percent of all nests surveyed were fully or partially depredated. In 2015 we studied in detail 92 nests from a single nesting site; 49% of nests hatched at least 1 egg, 43% of eggs were depredated, 31% of the eggs hatched and 26% had unknown fate. We provide Louisiana's first evaluation of diamond-backed terrapin nesting ecology critical for determining the conservation status of diamond-backed terrapins within Louisiana. Our findings provide natural resource managers with critical life history information that can be incorporated into current and future coastal restoration plans to benefit diamond-backed terrapins.
机译：菱纹背龟（Malaclemys terrapin）沿海分布在墨西哥湾沿德克萨斯州中南部的墨西哥湾和马萨诸塞州的北大西洋海岸之间。在其整个范围内，许多不同的生物和非生物因素已显示出会影响水龟的丰度，分布和筑巢成功。路易斯安那州野生生物和渔业部（LDWF）实施了一项为期多年（2013-2015年）的项目，该项目评估了路易斯安那州海岸线（主要在三角洲平原内）沿钻石支撑的terra筑巢生态。我们的工作重点是确定巢穴位置，巢捕食者和被捕食率，巢表面特征，巢深度，离合大小，卵形态，巢和巢生存。我们的结果表明，水龟筑巢发生在沿海地区，其中存在合适的筑巢基质。巢被放置在空旷的区域，并在茂密的植被覆盖下，各个方向的表面都倾斜。根据嵌套海滩的位置，折旧率在50％到100％之间。完整的离合器平均大小为6.5卵，在1到15卵之间变化。在全州范围内，平均蛋的形态计量为：质量10.6克，长度36.9毫米，宽度23.6毫米。平均巢顶深度为7.7厘米，平均巢底深度为11.8厘米。被调查的全部巢穴中有百分之七十六被完全或部分弃用。 2015年，我们对单个巢穴中的92个巢穴进行了详细研究； 49％的巢孵出了至少1个卵，43％的卵被淘汰了，31％的卵孵化了，还有26％的命运不明。我们提供路易斯安那州对菱形龟的筑巢生态的首次评估，这对于确定路易斯安那州菱形龟的保护状况至关重要。我们的发现为自然资源管理者提供了重要的生命历史信息，这些信息可以纳入当前和未来的沿海恢复计划中，从而使钻石级龟受益。

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  • 来源
    《Ocean & coastal management》 |2018年第4期|8-14|共7页
  • 作者

    Pearson Steven H.; Wiebe Jon J.;

  • 作者单位

    Louisiana Dept Wildlife & Fisheries, 646 Cajundome Blvd, Lafayette, LA 70503 USA;

    Louisiana Dept Wildlife & Fisheries, 646 Cajundome Blvd, Lafayette, LA 70503 USA;

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