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Guidelines for acoustic surveys in the northwest African region.








FAO. Guidelines for acoustic surveys in the northwest African region/Directives pour les campagnes acoustiques dans la région de l’Afrique du Nord- Ouest. Rome, FAO. 2009. 49p.


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    Book (series)
    Report of the third meeting of the Planning Group for the Coordination of Acoustic Surveys off Northwest Africa. Dakar, Senegal, 22–23 October 2004. / Rapport de la troisième réunion du Groupe de planification pour la coordination des campagnes acoustiques au large de l'Afrique du Nord-Ouest. Dakar, Sénégal, 22-23 octobre 2004. 2005
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    The third meeting of the Planning Group for the Coordination of Acoustic Surveys off Northwest Africa was held in Dakar, Senegal, from 22 to 23 October 2004. The meeting was the third of its kind, following two meetings in Dakar, Senegal, from 26 to 28 October 2002 and from 28 to 29 October 2003. The scientists from the Northwest African region expressed their commitment to conduct their own acoustic surveys. All of the local research vessels conducted acoustic surveys in 2004. The a bility of running acoustic surveys in the sub-region has developed to a good level and focus in the future should be on the development of human capacity and to resolve the recurrent technical problems of trawl performance, noise discrimination and data storage. The timeframe of the continued surveys with R/V DR. FRIDTJOF NANSEN and the support through the Nansen Programme is unknown and high priority must therefore be given to the improvement of scientists skills in acoustic abundan ce estimation.
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    Book (series)
    Report of the fourth meeting of the Planning Group for the Coordination of Acoustic Surveys off Northwest Africa. Dakar, Senegal, 27–29 October 2005. 2007
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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.
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    Book (series)
    Report of the Workshop to plan the 1999 R/V DR. FRIDTJOF NANSEN surveys in the northern CECAF area and the standardization of acoustic surveys in the region. Casablanca, Morocco, 18-22 October 1999. / Rapport de l'Atelier pour la planification des prospections du N/R DR. FRIDTJOF NANSEN dans la zone nord du COPACE en 1999 et la standardisation des campagnes acoustiques de la région. Casablanca, Maroc, 18-22 octobre 1999. 2001
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    A Workshop to plan the 1999 R/V DR. FRIDTJOF NANSEN surveys in the northern CECAF area and the standardization of acoustic surveys in the region was held in Casablanca, Morocco from 18 to 22 October 1999. This Workshop was a follow-up to the Workshop "A review of the surveys off Northwest Africa in the 1990s" held in Bergen in 1998 (FAO, 1998). The countries represented were the Gambia, Mauritania, Morocco and Senegal as well as Norway, Russia and FAO. The purpose of the Workshop was to plan the 1999 acoustic survey with the R/V DR. FRIDTJOF NANSEN off Northwest Africa in November-December 1999 and to discuss the standardization of acoustic surveys in the Northern CECAF area as well as following-up on other recommendations from the meeting in Bergen in 1998. The Workshop stressed the usefulness of the results from the DR. FRIDTJOF NANSEN surveys and strongly recommended that the surveys be continued. The Workshop considered that the use of the results for stock assessment could st ill be increased at a regional level and therefore recommended to establish a Working Group on assessment of small pelagic resources in the same region as covered by the DR. FRIDTJOF NANSEN surveys. The Working Group on Guidelines provided a first draft of the Guidelines for acoustic surveys in Northwest Africa. It was recommended that the Working Group should meet again before the next acoustic survey in the year 2000.

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