Results for Greenland halibut, American plaice and Atlantic cod of the Spanish survey in NAFO Div. 3NO for the period 1997-2011
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Greenland halibut (Reinhardtius hippoglossoides), American plaice (Hippoglossoides platessoides) and Atlantic cod (Gadus morhua) indices from the bottom trawl survey that Spain carries out in Spring since 1995 in Div. 3NO of the NAFO Regulatory Area are presented. Mean catch per town, biomass, length and age distributions for the three species are presented since 1997, year in which the survey extended the depth strata. In 2001, the R/V Vizconde de Eza replaced the C/V Playa de Menduíña in the execution of the survey. We present the transformed to the R/V Vizconde de Eza series for the period 1997-2000, and the original obtained data for the period 2002-2011. In 2001, there are data from the two vessels. Greenland halibut biomass and abundance estimates present a decreasing trend since 1999, cut in year 2007 with a slight increase and a high increase since 2008, reaching in 2009 the highest value in the series. In 2011 the biomass drops under the 2008 value. In last years it can ...
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