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首页> 外文期刊>ICES Journal of Marine Science >Species identification in seamount fish aggregations using moored underwater video
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Species identification in seamount fish aggregations using moored underwater video

机译：利用水下系泊视频识别海山鱼类聚集体中的物种

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摘要

Acoustic surveys of New Zealand deep-water seamounts often show fish aggregations up to 150 m high on the summit. Although bottom trawls on the seamount slopes catch predominantly orange roughy (Hoplostethus atlanticus), species composition in the mid-water plumes is extremely uncertain. In June 2010, moored underwater video cameras were deployed on the summit of the Morgue seamount (summit depth 890 m), a feature that has been closed to fishing since 2001. Cameras and lights were timed to come on for 2 min every 2 h. Fish response to the mooring was monitored using vessel-mounted echosounders. Moored cameras confirmed that orange roughy were present up to 70 m above the seamount summit. Orange roughy made up 97% of the fish identified from the video. Other species observed included smooth oreo (Pseudocyttus maculatus), spiky oreo (Neocyttus rhomboidalis), deep-water dogfish, cardinalfish (Epigonus spp.), and squid. Total along-track backscatter from the plume varied by a factor of 25 over a period of hours. Peak acoustic densities in the plume (equivalent to 20 orange roughy m~(-3)) were an order of magnitude higher than peak visual estimates (0.64 orange roughy m~(-3)), but relative densities between paired video and acoustic observations were generally consistent.
机译：对新西兰深水海山的声学调查通常显示，在山顶上鱼类聚集高度高达150 m。尽管海山斜坡上的底部拖网捕获的主要是橙色的粗糙物（Hoplostethus atlanticus），但中层水羽中的物种组成仍然非常不确定。 2010年6月，停泊的水下摄像机被部署在Morgue海山的山顶（最高深度890 m），该功能自2001年起就禁止捕鱼。摄像机和照明灯每2小时定时点亮2分钟。鱼对系泊的反应是使用安装在船上的回声测深仪监测的。停泊的摄像机证实，在距海山顶不超过70 m处存在橙色rough石。从视频中识别出的鱼中，橙色粗皮鱼占97％。观察到的其他物种包括光滑的奥利奥（Pseudocyttus maculatus），尖峰的奥利奥（Neocyttus rhomboidalis），深水dog鱼，红衣主教鱼（Epigonus spp。）和鱿鱼。羽流沿轨道的总反向散射在几个小时内变化了25倍。羽流中的峰值声密度（相当于20个橙色毛糙m〜（-3））比峰值视觉估计值（0.64橙色毛糙m〜（-3））高一个数量级，但是配对视频和声学观测之间的相对密度基本上是一致的。

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  • 来源
    《ICES Journal of Marine Science》 |2012年第4期|p.648-659|共12页
  • 作者

    Richard L ODriscoll; Peter de Joux; Richard Nelson; Gavin J. Macaulay; Adam J. Dunford; Peter M. Marriott; Craig Stewart; Brian S. Miller;

  • 作者单位

    National Institute of Water and Atmospheric Research Limited, Private Bag 14-901, Kilbirnie, Wellington 6241, New Zealand;

    National Institute of Water and Atmospheric Research Limited, Private Bag 14-901, Kilbirnie, Wellington 6241, New Zealand;

    National Institute of Water and Atmospheric Research Limited, Private Bag 14-901, Kilbirnie, Wellington 6241, New Zealand;

    Institute of Marine Research, PO Box 1870 Nordnes, 5817 Bergen, Norway;

    National Institute of Water and Atmospheric Research Limited, Private Bag 14-901, Kilbirnie, Wellington 6241, New Zealand;

    National Institute of Water and Atmospheric Research Limited, Private Bag 14-901, Kilbirnie, Wellington 6241, New Zealand;

    National Institute of Water and Atmospheric Research Limited, Private Bag 14-901, Kilbirnie, Wellington 6241, New Zealand;

    National Institute of Water and Atmospheric Research Limited, Private Bag 14-901, Kilbirnie, Wellington 6241, New Zealand;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    acoustics; mark identification; orange roughy; seamounts;

    机译：声学;标记识别;橙色rough海山;

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