Oddgeir Alvheim’s scientific contributions

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Publications (2)


Survey of the Demersal Fish Resources of the outer shelf and slope off Ghana
  • Technical Report
  • Full-text available

November 2010

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44 Reads

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Oddgeir Alvheim

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[...]

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Damoah Kwame
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FIGURE 1 Diagram of the parallel survey design  
TABLE 1
FIGURE 2 Senegal 2004 first intercalibration. a) Total S A values per nautical mile sailed for R/V Itaf Deme and R/V Dr. Fridtjof Nansen (left) and b) correlation between the nautical mile values recorded by the two vessels (right)
TABLE 2 :
FIGURE 3 Senegal 2004 second intercalibration. a) Total S A values per nautical mile sailed for R/V Itaf Deme and R/V Dr. Fridtjof Nansen (left) and b) correlation between the nautical mile values recorded by the two vessels (right)  

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Towards coordinated acoustic surveys in Northwest Africa: results of parallel surveys and intercalibrations

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