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首页> 外文OA文献 >Population dynamics and movements of the Kemp's ridley sea turtle, lepidochelys kempii, in the northwestern Gulf of Mexico
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Population dynamics and movements of the Kemp's ridley sea turtle, lepidochelys kempii, in the northwestern Gulf of Mexico

机译：墨西哥西北部肯普（Kemp）里德利海龟（lepidochelys kempii）的种群动态和运动

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摘要

The Kemp?s ridley sea turtle, Lepidochelys kempii, is recovering fromdevastating declines that reduced nesting activity from a single-day estimate of 10,000-40,000 females in 1947 to fewer than 300 during all of 1985. Nesting beach monitoringis crucial to estimating population size and reproductive activity, but in-water data areessential for understanding population dynamics and evaluating management strategies.Hook-and-line, stranding, and nesting records, satellite telemetry, and dietanalyses were used to characterize ridley population dynamics and movements in thenorthwestern Gulf of Mexico during 2003-2007. Recreational hook-and-line capturescomprised approximately one third of non-nesting encounters along Galveston andJefferson Counties, Texas. The hook-and-line dataset displayed similar geographical andmonthly trends to that of strandings, but was devoid of pelagic-stage, subadult, and adultridleys.Coastal and bay waters along the upper Texas and western Louisiana coasts wereutilized by immature ridleys during warmer months. Nesting occurred along GalvestonIsland on both armored and unarmored beaches. Inter-nesting females exhibited fidelityto Galveston during nesting season and subsequently migrated to federal waters offshoreLouisiana. Crabs were important components of benthic-stage (>25 cm SCL) ridley diet,while worm tubes were targeted by some individuals. Short satellite track durations for immature ridleys precipitated examinations ofbiofouling, attachment protocols, and turtle excluder device (TED) interactions.Antifouling paints drastically reduced fouling of transmitters. A less-rigid neopreneattachment method was developed to increase transmitter retention on fast-growingjuveniles, but further trials are necessary. Transmitters were not damaged or lost duringTED trials, but turtle escape times increased when transmitters wedged between TEDbars.Projected population growth will increase numbers of Kemp?s ridleys utilizingthe Gulf of Mexico and interacting with human activities. Future research shouldexamine year-round distribution and abundance of all life history stages and furthercharacterize recreational hook-and-line capture, nesting activity, movements, and diet.Education efforts targeting the beach-going public, beach residents and workers, and therecreational fishing sector should be employed to promote sea turtle reporting andminimize negative interactions. State and federal managers should examineanthropogenic impacts within the region and determine the need for mitigation and/orregulations to promote continued species recovery.
机译：肯普（Kemp）的里德利海龟（Lepidochelys kempii）正在从毁灭性的衰退中恢复，该衰退使筑巢活动从1947年的10,000-40,000只单日雌性减少到1985年全年的300只以下。筑巢海滩的监测对于估计种群数量和数量至关重要。繁殖活动，但是水中数据对于了解种群动态和评估管理策略至关重要。钩挂线，搁浅和筑巢记录，卫星遥测和营养分析被用来表征墨西哥西北部墨西哥湾在2001年的ridley种群动态和运动2003-2007。娱乐性钩钓捕获约占得克萨斯州加尔维斯顿和杰斐逊县非嵌套接触的三分之一。钩线数据集显示的地理和月度趋势与搁浅相似，但缺乏浮游期，亚成年和成年陆域。得克萨斯州上游和路易斯安那州西部沿海的沿海和海湾水域在较温暖的月份被未成熟的陆域河流利用。在装甲和非装甲海滩上都沿着加尔维斯顿岛筑巢。嵌套的雌性在筑巢季节对加尔维斯顿表现出忠诚，随后移居路易斯安那州近海的联邦水域。螃蟹是底栖阶段（> 25 cm SCL）ridley饮食的重要组成部分，而蠕虫管则被某些人作为目标。未成熟ridley的卫星跟踪持续时间短，使得对生物污损，附着规程和乌龟排除装置（TED）相互作用的检查变得更加容易。防污涂料可大大减少变送器的污垢。开发了一种较不刚性的氯丁橡胶附着方法，以增加发射机在快速生长的幼虫上的保持力，但还需要进一步的试验。发射器在TED试验中没有损坏或丢失，但是当发射器卡在TEDbar之间时，乌龟的逃生时间增加了。预计的种群增长将增加利用墨西哥湾并与人类活动相互作用的肯普氏带的数量。未来的研究应该检查所有生活史阶段的全年分布和丰富程度，并进一步表征休闲钩钓的捕捉，筑巢活动，运动和饮食的特征。针对海滩居民，海滩居民和工人以及休闲捕鱼部门的教育工作应采用以促进海龟报告和最小化负面互动。州和联邦管理人员应检查该区域内的人为影响，并确定需要采取缓解措施和/或法规以促进物种的持续恢复。

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    Seney Erin Elizabeth;

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