RANGE AND MOVEMENTS OF FEMALE HEAVISIDE'S DOLPHINS (CEPHALORHYNCHUS HEAVISIDII), AS DETERMINED BY SATELLITE-LINKED TELEMETRY
RANGE AND MOVEMENTS OF FEMALE HEAVISIDE'S DOLPHINS (CEPHALORHYNCHUS HEAVISIDII), AS DETERMINED BY SATELLITE-LINKED TELEMETRY
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通过卫星连接遥测确定的雌性赫维赛德海豚 (CEPHALORHYNCUS HEAVISIDII) 的活动范围和活动
DOI：
10.1644/05-mamm-a-307r2.1
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
S. Swanson
中科院分区：
文献类型：
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作者：
S. Elwen;Michael A. Meÿer;P. B. Best;P. G H. Kotze;M. Thornton;S. Swanson
海氏海豚（Cephalorhynchus hepasidii）是一种分布于非洲南部西海岸的沿海海豚科动物。了解其栖息地的使用情况是评估其对渔业相互作用的潜在脆弱性的重要前提。2004年，六只海维赛德海豚（1只雄性和5只雌性）被安装了与卫星相连的发射器，并被跟踪了54天。5标签安装到雌性海豚连续传输，允许在一个精细的时间尺度上的运动分析。四海豚表现出最初的避免捕获现场移动在一个更广泛的区域，在第2-5天posttagging比后来在部署期间。所有海豚使用其完整的家庭范围（确定为100%最小凸多边形）5-20天前标签故障，这表明测量的家庭范围是稳定的，在这个时间尺度。使用当地凸包的家庭范围估计范围为301.9至1，027.6平方公里（90%等值线）和875.9至1，989.6平方公里，使用100%等值线，并与身体大小成正比，但形状，用途和核心使用区域的数量各不相同。虽然个体海豚离海岸的距离和活动深度差异很大，但所有海豚都表现出强烈的沿岸-离岸昼夜活动模式，通常在0600 h至中午之间最靠近海岸，在1500 h至0500 h之间最远离离岸。这种模式被认为是有关的运动，他们的主要猎物，少年浅水无须鳕（Merluccius capensis），在夜间迁移到上层水柱。向岸边移动可能与休息、社交和躲避捕食者有关。
Abstract Heaviside's dolphin (Cephalorhynchus heavisidii) is a coastal delphinid with a limited inshore distribution off the west coast of southern Africa. Knowledge of its habitat usage is an essential precursor to assessing its potential vulnerability to fisheries interactions. Six Heaviside's dolphins (1 male and 5 females) were fitted with satellite-linked transmitters in 2004, and tracked for up to 54 days. The 5 tags fitted to female dolphins transmitted continuously, allowing for analysis of movements at a fine temporal scale. Four dolphins showed an initial avoidance of the capture site by moving over a wider area in the first 2–5 days posttagging than later in the deployment period. All dolphins had used their full home ranges (determined as 100% minimum convex polygons) 5–20 days before tag failure, suggesting measured home ranges were stable at this temporal scale. Home-range estimates using local convex hulls ranged from 301.9 to 1,027.6 km2 (90% isopleths) and 875.9 to 1,989.6 km2 using the 100% isopleths and scaled positively with body size but varied in shape, usage, and number of core-use areas. Although the distance from shore and depth at which individual dolphins moved varied greatly, all dolphins showed a strong onshore–offshore diurnal movement pattern, generally being closest inshore between 0600 h and noon, and farthest offshore between 1500 h and 0500 h. This pattern is assumed to be related to the movements of their principal prey, juvenile shallow-water hake (Merluccius capensis), which migrate into the upper water column at night. Movements inshore may be associated with rest, socializing, and predator avoidance.
DOI：
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发表时间：
2011
期刊：
影响因子：
--
作者：
Naito Y;Costa DP;Adachi T;Robinson PW;Fowler M;Takahashi A
通讯作者：
Takahashi A