Report of the fourth meeting of the Planning Group for the Coordination of Acoustic Surveys off Northwest Africa. Dakar, Senegal, 27–29 October 2005.
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The fourth meeting of the Planning Group for the Coordination of Acoustic Surveys off Northwest Africa was held in Dakar, Senegal, from 27 to 29 October 2005. All of the local research vessels conducted acoustic surveys in 2005 and major improvements have been made in standardization of procedures and processing of data. The results of the 2004 parallel survey between the three local vessels and the R/V DR. FRIDTJOF NANSEN showed that the four vessels have almost the same acoustic re sponse. Although major improvements have been achieved, some problems still persist, e.g. problems with trawling using the pelagic trawl and problems related to noise levels. These issues are now being addressed. Plans were made for a second parallel survey and intercalibration exercise to take place in October– December 2005. It was recommended that the countries in the Northwest African region, Senegal, the Gambia, Mauritania and Morocco should coordinate their survey effort to con duct two annual regional acoustic surveys, during the cold and warm seasons respectively. Should it not be possible to conduct two complete coverages during one year, priority should be given to the October–December survey.