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High fidelity of sea turtles to their foraging grounds revealed by satellite tracking and capture-mark-recapture: New insights for the establishment of key marine conservation areas
Biological Conservation ( IF 4.9 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.biocon.2020.108742
Flora Siegwalt , Simon Benhamou , Marc Girondot , Lorène Jeantet , Jordan Martin , Marc Bonola , Pierre Lelong , Clément Grand , Philippine Chambault , Abdelwahab Benhalilou , Céline Murgale , Thomas Maillet , Lucas Andreani , Guilhem Campistron , François Jacaria , Gaëlle Hielard , Alexandre Arqué , Denis Etienne , Julie Gresser , Sidney Régis , Nicolas Lecerf , Cédric Frouin , Fabien Lefebvre , Nathalie Aubert , Fabien Vedie , Cyrille Barnerias , Laurent Thieulle , Christelle Guimera , Myriam Bouaziz , Adrien Pinson , Frédéric Flora , Francis George , Joffrey Eggenspieler , Thierry Woignier , Jean-Pierre Allenou , Laurent Louis-Jean , Bénédicte Chanteur , Christelle Béranger , Jessica Crillon , Aude Brador , Caroline Habold , Yvon Le Maho , Jean-Patrice Robin , Damien Chevallier

Abstract Movement ecology studies are essential to protect highly mobile threatened species such as the green turtle (Chelonia mydas), classified as an endangered species by the IUCN. In 2019, the South Atlantic subpopulation has been downlisted to ‘Least Concern’, but the maintenance of this status strongly relies on the pursuit of research and conservation, especially on immatures, which contribute to the demographic renewal of this subpopulation. Identifying marine areas used by immatures is therefore crucial to implement efficient measures for the conservation of sea turtles in the Caribbean. We analysed data of capture-mark-recapture of 107 (out of 299) immatures recaptured at least once in Martinique, and satellite tracked 24 immatures to investigate their site fidelity and habitat use. Our results revealed a strong fidelity to foraging grounds, with mean residence times higher than 2 years, and with a high degree of affinity for specific areas within the coastal marine vegetation strip. Home ranges (95% kernel contour) and core areas (50% kernel contour) varied from 0.17 to 235.13 km2 (mean ± SD = 30.73 ± 54.34 km2) and from 0.03 to 22.66 km2 (mean ± SD = 2.95 ± 5.06 km2), respectively. Our findings shed light on a critical developmental area for immature green turtles in the French West Indies, and should help to refine Regional Management Units and reinforce the cooperative network aiming at ensuring conservation of the species at international scale.

中文翻译:

卫星跟踪和捕获标记重新捕获显示海龟对其觅食地的高保真度:建立关键海洋保护区的新见解

摘要 运动生态学研究对于保护高度流动的受威胁物种至关重要,例如被 IUCN 列为濒危物种的绿海龟 (Chelonia mydas)。2019 年,南大西洋亚种群已被降为“最不关心”,但维持这一地位强烈依赖于对研究和保护的追求,尤其是对不成熟种群的追求,这有助于该亚种群的人口更新。因此,确定未成熟海龟使用的海洋区域对于实施有效措施保护加勒比海海龟至关重要。我们分析了在马提尼克岛至少重新捕获一次的 107 只(共 299 只)幼鱼的捕获标记重新捕获数据,卫星跟踪了 24 只幼鱼以调查它们的场地保真度和栖息地使用情况。我们的结果显示对觅食地的高度忠诚,平均停留时间高于 2 年,并且对沿海海洋植被带内的特定区域具有高度的亲和力。归属范围(95% 内核等值线)和核心区域(50% 内核等值线)从 0.17 到 235.13 平方公里(平均值 ± SD = 30.73 ± 54.34 平方公里)和从 0.03 到 22.66 平方公里(平均值 ± SD = 2.95 ± 5.06 平方公里)不等,分别。我们的研究结果揭示了法属西印度群岛未成熟绿海龟的关键发展区域,应该有助于完善区域管理单位并加强旨在确保在国际范围内保护物种的合作网络。归属范围(95% 内核等值线)和核心区域(50% 内核等值线)从 0.17 到 235.13 平方公里(平均值 ± SD = 30.73 ± 54.34 平方公里)和从 0.03 到 22.66 平方公里(平均值 ± SD = 2.95 ± 5.06 平方公里)不等,分别。我们的研究结果揭示了法属西印度群岛未成熟绿海龟的关键发展区域,应该有助于完善区域管理单位并加强旨在确保在国际范围内保护物种的合作网络。归属范围(95% 内核等值线)和核心区域(50% 内核等值线)从 0.17 到 235.13 平方公里(平均值 ± SD = 30.73 ± 54.34 平方公里)和从 0.03 到 22.66 平方公里(平均值 ± SD = 2.95 ± 5.06 平方公里)不等,分别。我们的研究结果揭示了法属西印度群岛未成熟绿海龟的关键发展区域,应该有助于完善区域管理单位并加强旨在确保在国际范围内保护物种的合作网络。
更新日期:2020-10-01
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