Sex-specific migration patterns of hawksbill turtles breeding at Mona Island, Puerto Rico
Sex-specific migration patterns of hawksbill turtles breeding at Mona Island, Puerto Rico
复制标题
波多黎各莫纳岛繁殖的玳瑁海龟的性别特异性迁徙模式
DOI：
--
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
B. Schroeder
中科院分区：
文献类型：
--
作者：
R. Dam;C. Díez;G. Balazs;Luis A. Colón Colón;W. McMillan;B. Schroeder
从波多黎各莫纳岛通过卫星遥测追踪到的鹰嘴龟繁殖后的运动数据详细。跟踪了7只筑巢雌鸟和8只繁殖雄鸟。雌鸟到达觅食地的时间为3~53d，游泳距离84~2051公里(平均867公里，n=7)，平均游泳速度23.5~38.7kmd-1(n=7)。男性行走1~22d，行程2~476公里(平均101公里，n=8)，平均速度13.0~24.7 kmd~(-1)(n=5)。其中一只被跟踪的雄性在莫纳岛的繁殖场停留了11个月，然后在那里被重新捕获。另有两只雄性鹰嘴龟第二年从觅食地返回莫纳岛的迁徙也被记录在案。对这些成年海龟所使用的觅食栖息地进行了描述。观察到的雄性和雌性在迁徙范围上的显著差异是在食物丰度可预测性的进化背景下解释的；另一种关于死亡率地理差异的假设也被考虑在内。
Detailed post-breeding movement data is presented for hawksbill turtles tracked by satellite telemetry from Mona Island, Puerto Rico. Seven nesting females and 8 breeding males were tracked. Females traveled for 3 to 53 d to reach their foraging grounds, swimming distances of 84 to 2051 km (mean 867 km, n = 7) at average speeds of 23.5 to 38.7 km d -1 (n = 7). Males traveled for <1 to 22 d, covering distances of <2 to 476 km (mean 101 km, n = 8) at average speeds of 13.0 to 24.7 km d -1 (n = 5). One of the tracked males remained at the Mona Island breeding grounds for 11 mo before being recaptured there. The migration of 2 other male hawksbill turtles returning to Mona Island the following year from their foraging grounds was also documented. Descriptions of the foraging habitats used by these adult turtles are provided. The significant differences observed in migratory range between males and females are interpreted in an evolutionary context of food abundance pre- dictability; an alternative hypothesis of geographic variation in mortality rates is also considered.