Thorny Skate Indices from the Spanish Surveys Conducted 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 and biomass for Thorny skate are pr...

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Main Author: González-Troncoso, D. (Diana)
Format: Report
Language:English
Published: Centro Oceanográfico de Vigo 2004
Subjects:
North Atlantic
Northwest Atlantic
Online Access:http://hdl.handle.net/10508/596
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author González-Troncoso, D. (Diana)
author_facet González-Troncoso, D. (Diana)
author_sort González-Troncoso, D. (Diana)
collection Instituto Español de Oceanografía: e-IEO
description 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 and biomass for Thorny skate are presented for the period 1995-2000, and the lenght distribution for the period 1997-2000, and the no-transformed data for the years 2001-2003. The standard deviation are shown for abundance and biomass. The summed abundance and biomass based on conversion of the lenght frequencies are presented and compared to the estimates from the method used to convert the CPUE. A decreasing in Thorny skate abundance and biomass is observed in last years (2001-2003).
format Report
genre North Atlantic
Northwest Atlantic
genre_facet North Atlantic
Northwest Atlantic
id ftieo:oai:repositorio.ieo.es:10508/596
institution Open Polar
language English
op_collection_id ftieo
op_coverage Atlantic Ocean
North Atlantic
Northwest Atlantic
NAFO
op_relation http://hdl.handle.net/10508/596
González Troncoso, D. 2004. Thorny Skate Indices from the Spanish Surveys Conducted in the NAFO Regulatory Area of Divisions 3NO, 1995-2003. NAFO Sci. Coun. Res. Doc. 04/24, Serial Nº N4972: 18p.
op_rights Atribución-NoComercial-SinDerivadas 3.0 España
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
op_rightsnorm CC-BY-NC-ND
publishDate 2004
publisher Centro Oceanográfico de Vigo
record_format openpolar
spelling ftieo:oai:repositorio.ieo.es:10508/596 2025-01-16T23:38:46+00:00 Thorny Skate Indices from the Spanish Surveys Conducted in the NAFO Regulatory Area of Divisions 3NO, 1995-2003 González-Troncoso, D. (Diana) Atlantic Ocean North Atlantic Northwest Atlantic NAFO 2004 http://hdl.handle.net/10508/596 eng eng Centro Oceanográfico de Vigo http://hdl.handle.net/10508/596 González Troncoso, D. 2004. Thorny Skate Indices from the Spanish Surveys Conducted in the NAFO Regulatory Area of Divisions 3NO, 1995-2003. NAFO Sci. Coun. Res. Doc. 04/24, Serial Nº N4972: 18p. Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ CC-BY-NC-ND workingPaper 2004 ftieo 2022-07-26T23:46:46Z 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 and biomass for Thorny skate are presented for the period 1995-2000, and the lenght distribution for the period 1997-2000, and the no-transformed data for the years 2001-2003. The standard deviation are shown for abundance and biomass. The summed abundance and biomass based on conversion of the lenght frequencies are presented and compared to the estimates from the method used to convert the CPUE. A decreasing in Thorny skate abundance and biomass is observed in last years (2001-2003). Report North Atlantic Northwest Atlantic Instituto Español de Oceanografía: e-IEO
spellingShingle González-Troncoso, D. (Diana)
Thorny Skate Indices from the Spanish Surveys Conducted in the NAFO Regulatory Area of Divisions 3NO, 1995-2003
title Thorny Skate Indices from the Spanish Surveys Conducted in the NAFO Regulatory Area of Divisions 3NO, 1995-2003
title_full Thorny Skate Indices from the Spanish Surveys Conducted in the NAFO Regulatory Area of Divisions 3NO, 1995-2003
title_fullStr Thorny Skate Indices from the Spanish Surveys Conducted in the NAFO Regulatory Area of Divisions 3NO, 1995-2003
title_full_unstemmed Thorny Skate Indices from the Spanish Surveys Conducted in the NAFO Regulatory Area of Divisions 3NO, 1995-2003
title_short Thorny Skate Indices from the Spanish Surveys Conducted in the NAFO Regulatory Area of Divisions 3NO, 1995-2003
title_sort thorny skate indices from the spanish surveys conducted in the nafo regulatory area of divisions 3no, 1995-2003
url http://hdl.handle.net/10508/596

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