...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine biology >Horizontal and vertical movements of sailfish (Istiophorus platypterus) in the Arabian Gulf, determined by ultrasonic and pop-up satellite tagging
【24h】

Horizontal and vertical movements of sailfish (Istiophorus platypterus) in the Arabian Gulf, determined by ultrasonic and pop-up satellite tagging

机译：通过超声波和弹出式卫星标签确定阿拉伯湾中旗鱼（Istiophorus platypterus）的水平和垂直运动

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Small-scale movement behavior of sailfish ( Istiophorus platypterus) in the Arabian Gulf was evaluated between April 2002 and April 2004 using temperature- and pressure-sensitive ultrasonic telemetry. Of nine sailfish tagged, eight were successfully tracked for periods ranging from 3 h 33 min to 52 h 6 min. Total tracked distances ranged from 5.5 to 78.7 km, while maximum linear displacement from tagging locations ranged from 4.6 to 37.0 km. Average speed based on vessel positioning ranged from 0.29 to 0.75 m s(-1). The cumulative mean vertical distributions showed that 84.3% of time was spent above 10-m depth, even though water temperature altered little with increased depth. Data from two pop-up satellite archival tags deployed in 2002 were used to compare time spent at 5-m depth intervals with data from ultrasonic tags. There was no significant difference ( P< 0.05) in preferred depths between ultrasonic and pop-up tags for day or night, suggesting that the sailfish in this study recovered from capture stress and returned to normal behavior in relatively short times. Information on vertical and horizontal distribution can reveal preferential habitat that benefits fishery management practices relating to time/area closures, as well as determining optimal gear selection that reduces incidental bycatch and promotes conservation of sailfish in the Arabian Gulf.
机译：2002年4月至2004年4月，使用温度敏感和压力敏感的超声波遥测技术评估了阿拉伯湾中旗鱼（Istiophorus platypterus）的小规模活动行为。在标记的9条旗鱼中，成功跟踪了8条，时间从3小时33分钟到52小时6分钟不等。跟踪总距离在5.5至78.7 km之间，而标记位置的最大线性位移在4.6至37.0 km之间。基于船只位置的平均速度范围为0.29至0.75 m s（-1）。累积的平均垂直分布表明，即使水温随深度的增加而变化不大，但在10米深处花费了84.3％的时间。来自2002年部署的两个弹出式卫星档案标签的数据用于将5分钟深度间隔所花费的时间与超声波标签的数据进行比较。白天和晚上，超声波标签和弹出标签之间的首选深度没有显着差异（P <0.05），这表明该研究中的旗鱼从捕获压力中恢复并在较短时间内恢复了正常行为。垂直和水平分布的信息可以揭示有利的栖息地，有利于与时间/区域关闭有关的渔业管理实践，以及确定最佳的渔具选择，以减少偶然的兼捕并促进阿拉伯海湾的旗鱼养护。

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