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首页> 外文会议>Symposium on Science and the Challenge of Managing Small Pelagic Fisheries on Shared Stocks in Northwest Africa >Towards coordinated acoustic surveys in Northwest Africa: results of parallel surveys and intercalibrations
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Towards coordinated acoustic surveys in Northwest Africa: results of parallel surveys and intercalibrations

机译：在非洲西北部协调的声学调查：平行调查和闭幕的结果

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摘要

The coastal pelagic fish off Northwest Africa are stocks of high commercial and social importance that are shared between the countries of the subregion. Since 1995, these resources are subject to regular evaluation by the Norwegian research vessel R/V Dr. Fridtjof Nansen through regional acoustic surveys covering the area from southern Senegal to Cape Cantin in Morocco. This activity is undertaken within the framework of a programme of cooperation between the countries, FAO and the NANSEN Programme.With the acquisition of national research vessels with acoustic equipment, scientific activities were initiated to prepare for the national vessels to take over the responsibility for the acoustic surveys carried out by the R/V Dr. Fridtjof Nansen. To achieve this, several parallel surveys and intercalibration exercises were carried out to ensure comparable results between the national vessels and the R/V Dr. Fridtjof Nansen, using the latter as a reference. This study describes some of the results ofthese parallel surveys and intercalibrations, shows the recorded improvements made, underlines technical or methodological problems encountered and makes recommendations to improve the precision and the reliability of the abundance estimates of the mainpelagic resources in the area.
机译：西北非洲的沿海盆地鱼类是在次区域各国之间共享的高商业和社会重要性的股票。自1995年以来，这些资源通过挪威研究船R / V博士的定期评估，通过区域声学调查，覆盖来自塞内加尔南部的地区到摩洛哥的Cape Cantin。该活动是在各国，粮农组织和南森计划之间的合作方案的框架内进行的。在收购具有声学设备的国家研究船舶，启动科学活动，为国家船只接管该船舶的责任r / v南森博士博士进行的声学调查。为实现这一目标，进行了几个平行调查和互际练习，以确保国家船只与r / v·南肯Fridtjof anens之间的可比结果，将后者作为参考。本研究描述了这些并行调查和闭幕的一些结果，显示了记录的改进，强调了遇到的技术或方法问题，并提出了提高该地区大型资源的丰富估计的精度和可靠性。

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