Atlantic cod and Yellowtail flounder indices from the Spanish Survey conducted in Divisions 3NO of the NAFO Regulatory Area
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Since 1995, Spain carries out a stratified random spring bottom trawl survey in Div. 3NO of the NAFO Regulatory Area. In 2001, the trawl vessel and gear were replaced; so, the time series indices were transformed. The transformed entire series of mean catches, biomass and length distribution for Atlantic cod (Gadus morhua) are presented for the period 1997-2000 and for Yellowtail flounder (Limanda ferruginea) for the period 1995-2000, and the both species no-transformed data for the years 2002-2006. For 2001, there are data from the two vessels. For Atlantic cod we can see a general decreasing of the biomass since the year 2002, although this year the biomass is much higher because above all the catch of a simple town of almost 2 tons. For this species, a good recruitment can be seen in 2004 and 2005. For Yellowtail flounder, there is no a clear trend since 1998; its indices are almost constant along this period.
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