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Behavior of American alligators monitored by multi-sensor data loggers

机译:多传感器数据记录仪监视美洲鳄的行为

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ABSTRACT: Fine-scale behavior of crocodilians has rarely been recorded in the field despite the important ecological roles these reptiles play in wetland systems around the world. In this study, we attached multi-sensor data loggers to free-ranging American alligators Alligator mississippiensis in the northern Banana River Lagoon, Florida, to record their diving and swimming behavior, diel activity patterns, and horizontal movements. The alligators repeatedly showed shallow, inactive dives (mean depth: 0.75 m, duration: 310 s), which may represent sit-and-wait foraging for prey. The alligators also showed periodic, submerged swimming events (mean duration: 59 s, swim speed: 0.31 m s−1, tail-beat frequency: 0.47 Hz). Based on the occurrence of diving and swimming events, and the activity level inferred from acceleration records, the animals tended to be more active during the day than at night, suggesting behavioral thermoregulation. An individual with a global positioning system (GPS) logger attached swam northward along the shore, showing the utility of GPS tracking for this species. This study presents basic information for the natural behavior of crocodilians, an understudied group among aquatic vertebrates.
机译:摘要:尽管这些爬行动物在世界各地的湿地系统中发挥着重要的生态作用,但在野外却很少记录到鳄鱼的精细行为。在这项研究中,我们将多传感器数据记录器连接到佛罗里达州北部香蕉河泻湖北部自由活动的美国短吻鳄密西西比鳄,以记录其潜水和游泳行为,diel活动模式以及水平运动。短吻鳄反复表现出浅潜,不活跃的潜水(平均深度:0.75 m,持续时间:310 s),这可能代表了静坐觅食的猎物。短吻鳄还表现出周期性的水下游泳事件(平均持续时间:59 s,游泳速度:0.31 m s -1 ,拍打频率:0.47 Hz)。根据潜水和游泳事件的发生,以及从加速度记录推断的活动水平,这些动物在白天比晚上更倾向于活跃,表明其行为有温度调节作用。一个具有全球定位系统(GPS)记录器的人沿着海岸向北游泳,显示了该物种的GPS跟踪功能。这项研究提供了关于鳄鱼的自然行为的基本信息,鳄鱼是水生脊椎动物中一个未被充分研究的群体。

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