Yellowtail flounder, redfish (Sebastes spp.) and witch flounder indices from the Spanish Survey conducted in Divisions 3NO of the NAFO Regulatory Area
Since 1995, Spain carries out a spring stratified random bottom trawl survey in Div. 3NO of the NAFO Regulatory Area. Total mean catches, biomass and mean numbers for yellowtail flounder (Limanda ferruginea) are presented for the period 1995-2014, for redfish (Sebastes spp.) for the period 1997-2014...
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ftieo:oai:repositorio.ieo.es:10508/9345 2023-05-15T17:34:14+02:00 Yellowtail flounder, redfish (Sebastes spp.) and witch flounder indices from the Spanish Survey conducted in Divisions 3NO of the NAFO Regulatory Area González-Troncoso, D. (Diana) Nogueira, A. (Adriana) Vilas-Arrondo, N. (Nair) 1995-2014 Atlantic Ocean North Atlantic Northwest Atlantic NAFO Div. 3NO 2015-06 http://hdl.handle.net/10508/9345 eng eng Centro Oceanográfico de Vigo http://hdl.handle.net/10508/9345 NAFO Scientific Council 2015. (29/05/2015 - 11/06/2015. Halifax (Canadá)). 2015. NAFO SCR Doc. 15/008. Serial No. N6428 Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es/ openAccess CC-BY-NC-ND Survey NAFO Divisions 3NO Yellowtail flounder Redfish Witch flounder workingPaper 2015 ftieo 2022-10-04T23:46:44Z Since 1995, Spain carries out a spring stratified random bottom trawl survey in Div. 3NO of the NAFO Regulatory Area. Total mean catches, biomass and mean numbers for yellowtail flounder (Limanda ferruginea) are presented for the period 1995-2014, for redfish (Sebastes spp.) for the period 1997-2014 and for witch flounder (Glyptocephalus cynoglossus) for the period 2002-2014. Detailed indices are presented from 2009. Yellowtail flounder indices do not show a clear trend. Biomass increased from 1997 to 1999 and then remained almost constant throughout all the period, decreasing slightly in 2014. Redfish indices oscillate greatly over time, probably because the gear does not sample adequately aggregating pelagic species. There was a sharp increase in 2009 and since then has maintained higher values than before 2009, comprising the 3N around the 90% of the total biomass in the last years. In 2014 there was a decrease in all the indices in both Divisions. Good year classes have not been registered recently. Witch flounder is very scarce and its indices show a general decreasing trend throughout the period (2002-2014) remaining at very low levels. Recruitment was quite good at the beginning of the series but very poor in recent years. Report North Atlantic Northwest Atlantic Instituto Español de Oceanografía: e-IEO |
institution |
Open Polar |
collection |
Instituto Español de Oceanografía: e-IEO |
op_collection_id |
ftieo |
language |
English |
topic |
Survey NAFO Divisions 3NO Yellowtail flounder Redfish Witch flounder |
spellingShingle |
Survey NAFO Divisions 3NO Yellowtail flounder Redfish Witch flounder González-Troncoso, D. (Diana) Nogueira, A. (Adriana) Vilas-Arrondo, N. (Nair) Yellowtail flounder, redfish (Sebastes spp.) and witch flounder indices from the Spanish Survey conducted in Divisions 3NO of the NAFO Regulatory Area |
topic_facet |
Survey NAFO Divisions 3NO Yellowtail flounder Redfish Witch flounder |
description |
Since 1995, Spain carries out a spring stratified random bottom trawl survey in Div. 3NO of the NAFO Regulatory Area. Total mean catches, biomass and mean numbers for yellowtail flounder (Limanda ferruginea) are presented for the period 1995-2014, for redfish (Sebastes spp.) for the period 1997-2014 and for witch flounder (Glyptocephalus cynoglossus) for the period 2002-2014. Detailed indices are presented from 2009. Yellowtail flounder indices do not show a clear trend. Biomass increased from 1997 to 1999 and then remained almost constant throughout all the period, decreasing slightly in 2014. Redfish indices oscillate greatly over time, probably because the gear does not sample adequately aggregating pelagic species. There was a sharp increase in 2009 and since then has maintained higher values than before 2009, comprising the 3N around the 90% of the total biomass in the last years. In 2014 there was a decrease in all the indices in both Divisions. Good year classes have not been registered recently. Witch flounder is very scarce and its indices show a general decreasing trend throughout the period (2002-2014) remaining at very low levels. Recruitment was quite good at the beginning of the series but very poor in recent years. |
format |
Report |
author |
González-Troncoso, D. (Diana) Nogueira, A. (Adriana) Vilas-Arrondo, N. (Nair) |
author_facet |
González-Troncoso, D. (Diana) Nogueira, A. (Adriana) Vilas-Arrondo, N. (Nair) |
author_sort |
González-Troncoso, D. (Diana) |
title |
Yellowtail flounder, redfish (Sebastes spp.) and witch flounder indices from the Spanish Survey conducted in Divisions 3NO of the NAFO Regulatory Area |
title_short |
Yellowtail flounder, redfish (Sebastes spp.) and witch flounder indices from the Spanish Survey conducted in Divisions 3NO of the NAFO Regulatory Area |
title_full |
Yellowtail flounder, redfish (Sebastes spp.) and witch flounder indices from the Spanish Survey conducted in Divisions 3NO of the NAFO Regulatory Area |
title_fullStr |
Yellowtail flounder, redfish (Sebastes spp.) and witch flounder indices from the Spanish Survey conducted in Divisions 3NO of the NAFO Regulatory Area |
title_full_unstemmed |
Yellowtail flounder, redfish (Sebastes spp.) and witch flounder indices from the Spanish Survey conducted in Divisions 3NO of the NAFO Regulatory Area |
title_sort |
yellowtail flounder, redfish (sebastes spp.) and witch flounder indices from the spanish survey conducted in divisions 3no of the nafo regulatory area |
publisher |
Centro Oceanográfico de Vigo |
publishDate |
2015 |
url |
http://hdl.handle.net/10508/9345 |
op_coverage |
1995-2014 Atlantic Ocean North Atlantic Northwest Atlantic NAFO Div. 3NO |
genre |
North Atlantic Northwest Atlantic |
genre_facet |
North Atlantic Northwest Atlantic |
op_relation |
http://hdl.handle.net/10508/9345 NAFO Scientific Council 2015. (29/05/2015 - 11/06/2015. Halifax (Canadá)). 2015. NAFO SCR Doc. 15/008. Serial No. N6428 |
op_rights |
Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es/ openAccess |
op_rightsnorm |
CC-BY-NC-ND |
_version_ |
1766133000950513664 |