...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Aquatic Biology >Habitat selection by green turtles in a spatially heterogeneous benthic landscape in Dry Tortugas National Park, Florida
【24h】

Habitat selection by green turtles in a spatially heterogeneous benthic landscape in Dry Tortugas National Park, Florida

机译：佛罗里达干龟岛国家公园中空间异质底栖景观中绿海龟的栖息地选择

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

ABSTRACT: We examined habitat selection by green turtles Chelonia mydas at Dry Tortugas National Park, Florida, USA. We tracked 15 turtles (6 females and 9 males) using platform transmitter terminals (PTTs); 13 of these turtles were equipped with additional acoustic transmitters. Location data by PTTs comprised periods of 40 to 226 d in varying months from 2009 to 2012. Core areas were concentrated in shallow water (mean bathymetry depth of 7.7 m) with a comparably dense coverage of seagrass; however, the utilization distribution overlap index indicated a low degree of habitat sharing. The probability of detecting a turtle on an acoustic receiver was inversely associated with the distance from the receiver to turtle capture sites and was lower in shallower water. The estimated daily detection probability of a single turtle at a given acoustic station throughout the acoustic array was small (0.1 in any year), and that of multiple turtle detections was even smaller. However, the conditional probability of multiple turtle detections, given at least one turtle detection at a receiver, was much higher despite the small number of tagged turtles in each year (n = 1 to 5). Also, multiple detections of different turtles at a receiver frequently occurred within a few minutes (40%, or 164 of 415, occurred within 1 min). Our numerical estimates of core area overlap, co-occupancy probabilities, and habitat characterization for green turtles could be used to guide conservation of the area to sustain the population of this species.
机译：摘要：我们研究了美国佛罗里达州Dry Tortugas国家公园的绿海龟（Chelonia mydas）的栖息地选择。我们使用平台发射器终端（PTT）跟踪了15只海龟（6只雌性和9只雄性）;这些乌龟中的13只配备了额外的声音发射器。 PTT的位置数据包括2009年至2012年不同月份的40到226 d周期。核心区域集中在浅水区（平均测深7.7 m），海草覆盖相对密集。但是，利用分布重叠指数表明生境共享程度较低。在声学接收器上检测到乌龟的概率与从接收器到乌龟捕获点的距离成反比，而在浅水中则较低。在整个声波阵列中，给定声学站处的单个乌龟的估计每日检测概率很小（每年<0.1），而多次乌龟的检测概率甚至更小。但是，尽管每年被标记的海龟数量很少（n = 1至5），但在接收器至少检测到一只海龟的情况下，多次发现海龟的条件概率要高得多。此外，在接收器上经常会在几分钟内多次检测到不同的海龟（40％，即415的164，在1分钟内发生）。我们对核心区域重叠，同居概率和绿海龟栖息地特征的数值估算可以用来指导该地区的保护，以维持该物种的种群数量。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号