• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Remote drifted and diver operated stereo-video systems: A comparison from tropical and temperate reef fish assemblages
【24h】

Remote drifted and diver operated stereo-video systems: A comparison from tropical and temperate reef fish assemblages

机译：远程漂流和潜水员操作的立体声视频系统：热带和温带珊瑚礁鱼类组合的比较

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

Underwater Visual census methods for sampling reef fish that use scientific divers are common and can be effective in shallow water habitats. There is an ongoing need to develop methods that can sample reef fish assemblages in a similar manner, but at depths that are unsafe or inefficient for scientific divers using conventional SCUBA equipment. This study aimed to assess the limitations and biases associated with a drifted stereo-video system (Drifter) by comparing data collected with a diver operated stereo-video system (stereo-DOVs) at the same locations. The composition, number of species, total abundance and the abundances of dominant reef fishes were compared across the two sampling techniques at three temperate and three tropical reefs. There were no significant differences between the compositions of the assemblage sampled by each technique at either the temperate or tropical reefs. There was significantly higher dispersion in the data collected by the Drifter. This higher dispersion was most likely caused by the combined effects of low vehicle stability, the positioning of the drifter higher in the water column in comparison to the stereo DOVs and the challenges associated with navigating the drifter along narrow and fragmented reefs. The stereo-DOVs sampled more species of fish and more individuals than the Drifter. No significant differences were detected in the abundance of any of the dominant species. The Drifter provides a comparable technique to stereo-DOVs, without the depth and time limitations inherent to that system. The high dispersion of the data, low number of species and lower number of individuals sampled by the Drifter result in a slightly lower statistical power from an equivalent sampling effort when compared to stereo-DOVs. Future developments which will help overcome these differences are discussed. (C) 2016 Elsevier B.V. All rights reserved.
机译：使用科学潜水员对珊瑚鱼进行水下视觉普查的方法很普遍，在浅水生境中可能有效。不断需要开发一种方法，以类似的方式对珊瑚鱼的集合进行采样，但是对于使用传统的SCUBA设备的科学潜水员来说，其深度是不安全的或效率低下的。这项研究旨在通过比较在相同位置使用潜水员操作的立体视频系统（stereo-DOV）收集的数据来评估与漂移的立体视频系统（Drifter）相关的局限性和偏见。在三个温带和三个热带珊瑚礁的两种采样技术下，比较了珊瑚礁鱼类的组成，种类数量，总丰度和优势珊瑚鱼类的丰度。在温带或热带珊瑚礁上，每种技术所取样的组合物组成之间没有显着差异。 Drifter收集的数据分散性明显更高。较高的分散性很可能是由于车辆稳定性差，与立体式DOV相比，漂流器在水柱中的位置较高，以及在狭窄和破碎的礁石上进行漂流所带来的挑战所致。立体DOV比漂流者采样的鱼类种类和个体更多。没有发现任何优势种的丰度有显着差异。漂移器提供了与立体声DOV相当的技术，而没有该系统固有的深度和时间限制。与立体DOV相比，由于同等的采样工作，数据的高分散性，较少的物种数和较少的个体采样数导致统计功效略低。讨论了将有助于克服这些差异的未来发展。 （C）2016 Elsevier B.V.保留所有权利。

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