Atlantic cod and Yellowtail flounder indices from the Spanish Survey conducted in Divisions 3NO of the NAFO Regulatory Area
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AuthorsGonzález-Troncoso, D.M. (Diana María); González-Iglesias, M.C. (María de la Concepción); Paz, X. (Xabier)
Since 1995, Spain carries out a stratified random spring bottom trawl survey in Div. 3NO of the NAFO Regulatory Area. The entire series of mean catches, biomass and length distribution for Atlantic cod (Gadus morhua) are presented for the period 1997-2009 and for Yellowtail flounder (Limanda ferruginea) for the period 1995-2009. For Atlantic cod we can see a general decreasing in the biomass between 2002 and 2005, and a increasing since then, especially in 2006 and, higher, in 2009, although this values is mainly due to two hauls with high catches, In 2007 the biomass decreased, but the level is over the value in the period 2002-2005. For this species, an increase in the recruitment can be seen in 2004 and 2005, and from 2007 the youngest length classes are much over the rest of the length classes. For Yellowtail flounder, there is no a clear trend since 1998; its indices are almost constant along this period.
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