New time series for Yellowtail flounder from the comparative experience between the C/V Playa de Menduíña and the R/V Vizconde de Eza in the NAFO Regulatory Area of Divisions 3NO, 1995-2003

Since 1995, a stratified random spring bottom trawl survey in the NAFO Regulatory Area of Div. 3NO was conducted by Spain. In 2001, the trawl vessel was replaced; so, the time series indices was transformed. The transformed entire series of mean catches, abundance, biomass and length distribution fo...

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Bibliographic Details
Main Authors: Paz, X. (Xabier), González-Troncoso, D. (Diana), Román-Marcote, E. (Esther)
Format: Report
Language:English
Published: Centro Oceanográfico de Vigo 2004
Subjects:
North Atlantic
Northeast Atlantic
Online Access:http://hdl.handle.net/10508/580
Description
Summary:Since 1995, a stratified random spring bottom trawl survey in the NAFO Regulatory Area of Div. 3NO was conducted by Spain. In 2001, the trawl vessel was replaced; so, the time series indices was transformed. The transformed entire series of mean catches, abundance, biomass and length distribution for Yellowtail flounder are presented for the period 1995-2000, and the no-transformed data for the years 2001-2003. The standard deviation is shown for abundance and biomass. The summed abundance and biomass based on conversion of the length frequencies are presented and compared to the estimates from the method used to convert the CPUE. The results are similar in both cases. The resource seems to be stable since 2000, although in 2001 there was a little increasing and this year there was a little decreasing.

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