Table 1
Overview of the surveys used, vessels involved (DFN: R/V Dr Fridtjof Nansen, ID: RV Itaf Deme, DS: Diassanga shallow water boat (Albaret et al., 2004; Ecoutin et al., 2013; Sadio, 2015), surveying periods and data available. NASC: Nautical area scattering coefficient (m2 NM−2), for sardinella group (SARD = Sardinella aurita and Sardinella maderensis), horse mackerels group (HORS = Trachurus trecae and Caranx rhonchus), other clupeids group (i.e. “P1”: including Ethmalosa fimbriata and Ilisha africana) other pelagic fish group (i.e. “P2”: other than clupeids and HORS).
| Vessels | Period | Country/Area | Data available | Interest | ||
|---|---|---|---|---|---|---|
| DFN | Nov 2005 | Senegal and The Gambia | Pooled NASC data [20–500 m] of SARD, HORS, P1 and P2 | NASC distribution of both sardinella pooled | ||
| Nov 2006 | Clupeid species occurrence in trawls, position and depth | |||||
| Nov 1981 to Nov 2004 | Senegal and The Gambia | Pooled NASC data [20–500 m] of SARD, HORS, P1 and P2 | Clupeid species occurrence in trawls, position and depth | |||
| ID | Nov 2004 | Senegal and The Gambia | ID as DFN but with separated NASC [10–500 m] for S. aurita and S. maderensis | NASC distribution of S. aurita and S. maderensis | ||
| Nov 2005 | ||||||
| Nov 2007 | ||||||
| Mar 2003 | Only Senegal | Idem as DFN with separated NASC for S. aurita and S. maderensis | Clupeid species occurrence per bottom depth from trawls | |||
| Mar 2004 | ||||||
| May 2005 | ||||||
| Nov 2006 | ||||||
| DS | 2008 | Delta Saloum | Relative biomass per species (64 species among which E. fimbriata, S. maderensis, S. aurita and I. africana) | Clupeid species occurrence, position and depth | ||
| 2009 | ||||||
| 2010 | ||||||
| 2011 | ||||||
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