Results for the Roughead Grenadier from the Spanish Surveys Conducted in the NAFO Regulatory Area of Divisions 3NO, 1997-2004

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 were transformed. The transformed entire series of mean catches, biomass and length distribution for Roughead...

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Bibliographic Details
Main Authors: González-Troncoso, Diana, Paz, Xabier, González-Costas, Fernando
Format: Report
Language:English
Published: 2005
Subjects:
Pesquerías
Centro Oceanográfico de Vigo
North Atlantic
Northwest Atlantic
Online Access:http://hdl.handle.net/10508/600
http://hdl.handle.net/10261/329126
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 were transformed. The transformed entire series of mean catches, biomass and length distribution for Roughead grenadier are presented for the period 1997-2000, and the no-transformed data for the years 2002-2004. In 2001, there are data from the two vessels. The summed biomass based on conversion of the length frequencies are presented and compared to the estimates from the method used to convert the CPUE. The indices of this species remains stable along the years, although an increasing is observed in last year (2004).

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