Results for Greenland halibut and American plaice of the Spanish survey in NAFO Div. 3NO: biomass, lenght distribution and age distribution for the period 1997-2006
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Greenland halibut (Reinhardtius hippoglossoides) and American plaice (Hippoglossoides platessoides) indices from the bottom trawl survey that Spain carries out in spring since 1995 in div. 3NO of the NAFO Regulatory Area are presented. Biomass, length distribution and age distribution are presented since 1997, year in that 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 2002-2006. In 2001, there are data from the two vessels. Greenland halibut biomass and abundance estimates present a decreasing trend since 1999. It seems not to be recuperation of the stock. In last years, it can be seen a presence of junveniles, mainly in 2004, but the greatest lengths have failed. For American plaice we can see an increasing trend along the whole period, reaching a maximum in 2006. ...
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