Fishing and Fisheries Research Centre, School of Earth and Environmental Sciences, James Cook University, Townsville, Qld 4811, Australia.
J Fish Biol. 2012 Apr;80(4):767-84. doi: 10.1111/j.1095-8649.2012.03223.x. Epub 2012 Mar 2.
An array of acoustic receivers deployed in Cleveland Bay, north Queensland, Australia, passively tracked 20 adult spottail sharks Carcharhinus sorrah over 2 years (2009-2010) to define patterns in movement and habitat use. Individuals were present in the study site for long periods, ranging from 8 to 408 days (mean = 185). Size and location of home ranges did not vary over time. A high level of segregation occurred among C. sorrah, with individuals using different types of habitat and showing strong attachment to specific regions. The depth of habitat individuals used varied between sexes. Males tended to use a narrow range of habitat depths within the study site (2·8-6·0 m), whereas females used shallower habitats (1·4-6·2 m) and displayed a seasonal shift in the depth of habitat used. Mean monthly habitat depth used varied by as much as 2 m for females, with individuals using shallower habitats during the winter months. Long-term presence and consistent home ranges suggest that Cleveland Bay provides important habitat for C. sorrah. By defining patterns in the use of nearshore habitats for C. sorrah, this study improves the understanding of the movement and habitat use of smaller-bodied coastal sharks and may help provide guidance for the management of their populations.
在澳大利亚北昆士兰州克利夫兰湾部署的一组声学接收器，在 2 年（2009-2010 年）的时间里，对 20 条成年斑点长尾鲨 Carcharhinus sorrah 进行了被动跟踪，以确定其运动和栖息地利用模式。个体在研究地点存在很长时间，范围从 8 到 408 天（平均值= 185 天）。家域的大小和位置没有随时间变化。斑点长尾鲨之间存在高度的隔离现象，个体使用不同类型的栖息地，并对特定区域表现出强烈的依附性。个体使用的栖息地深度因性别而异。雄性倾向于在研究地点内使用狭窄的栖息地深度范围（2.8-6.0 m），而雌性使用较浅的栖息地（1.4-6.2 m），并显示出使用栖息地深度的季节性变化。女性每月使用的平均栖息地深度差异可达 2 米，个体在冬季使用较浅的栖息地。长期存在和一致的家域表明，克利夫兰湾为 C. sorrah 提供了重要的栖息地。通过定义 C. sorrah 近岸栖息地利用模式，本研究提高了对较小体型沿海鲨鱼运动和栖息地利用的理解，并可能有助于为其种群管理提供指导。
