Results on Atlantic mackerel Spanish Discard Sampling Programme
Quarterly discards per ICES Divisions estimates for the Spanish bottom otter trawl fleet fishing in the Northeast Atlantic ICES Subareas VI, VII, VIII and IX are presented for Atlantic mackerel (Scomber scombrus). Information was obtained by observers on board under DCF discard sampling program carr...
Main Author: | |
---|---|
Other Authors: | , , |
Format: | Report |
Language: | English |
Published: |
2014
|
Subjects: | |
Online Access: | http://hdl.handle.net/10508/2069 http://hdl.handle.net/10261/329255 |
id |
ftcsic:oai:digital.csic.es:10261/329255 |
---|---|
record_format |
openpolar |
spelling |
ftcsic:oai:digital.csic.es:10261/329255 2024-02-11T10:06:28+01:00 Results on Atlantic mackerel Spanish Discard Sampling Programme Pérez-Contreras, María Nélida Araujo-Fernández, M.H. (María Hortensia) Salinas-Aguilera, M.I. (Miren Itxaso) Carrera, P. (Pablo) Copenhaguen (Denmark) Atlantic Ocean North Atlantic Northeast Atlantic 2014-08-26 http://hdl.handle.net/10508/2069 http://hdl.handle.net/10261/329255 en eng Centro Oceanográfico de Vigo Working Group on Widely Distributed Stocks (WGWIDE). (26/08/2014 - 01/09/2014. Copenhague (Dinamarca)). 2014. - http://hdl.handle.net/10508/2069 http://hdl.handle.net/10261/329255 20036 open Mackerel Centro Oceanográfico de Vigo Pesquerías Discards Northeast Atlantic waters Bottom otter trawl working paper 2014 ftcsic 2024-01-16T11:49:57Z Quarterly discards per ICES Divisions estimates for the Spanish bottom otter trawl fleet fishing in the Northeast Atlantic ICES Subareas VI, VII, VIII and IX are presented for Atlantic mackerel (Scomber scombrus). Information was obtained by observers on board under DCF discard sampling program carried out by the Spanish research institute IEO. Raising based on effort (number of trips) was used to estimate discards in weight and number for the most important fleets of Bottom Otter Trawlers. Discards age distributions are also presented. No trend is observed in discards volume only a great seasonality with higher discards values generally in the 1st and 4th quarter in Subarea VI_VII, and in the 1º in VIIIc and IXa Divisions. Thus, discards are highly variable throughout the series, both in weight and in number ranging from 30 to 4 580 tonnes per quarter and from 2 to 70 million fish. The highest discard weights are in Divisions VIIj, VIIIc and IXaN. 100% catches are discarded in Sub-areas VI-VII. Ages modes can, to some extent, be followed from one quarter to the next, especially in Divisions VIIIc-IXaN, although the signal is not very strong. Report North Atlantic Northeast Atlantic Digital.CSIC (Spanish National Research Council) |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Mackerel Centro Oceanográfico de Vigo Pesquerías Discards Northeast Atlantic waters Bottom otter trawl |
spellingShingle |
Mackerel Centro Oceanográfico de Vigo Pesquerías Discards Northeast Atlantic waters Bottom otter trawl Pérez-Contreras, María Nélida Results on Atlantic mackerel Spanish Discard Sampling Programme |
topic_facet |
Mackerel Centro Oceanográfico de Vigo Pesquerías Discards Northeast Atlantic waters Bottom otter trawl |
description |
Quarterly discards per ICES Divisions estimates for the Spanish bottom otter trawl fleet fishing in the Northeast Atlantic ICES Subareas VI, VII, VIII and IX are presented for Atlantic mackerel (Scomber scombrus). Information was obtained by observers on board under DCF discard sampling program carried out by the Spanish research institute IEO. Raising based on effort (number of trips) was used to estimate discards in weight and number for the most important fleets of Bottom Otter Trawlers. Discards age distributions are also presented. No trend is observed in discards volume only a great seasonality with higher discards values generally in the 1st and 4th quarter in Subarea VI_VII, and in the 1º in VIIIc and IXa Divisions. Thus, discards are highly variable throughout the series, both in weight and in number ranging from 30 to 4 580 tonnes per quarter and from 2 to 70 million fish. The highest discard weights are in Divisions VIIj, VIIIc and IXaN. 100% catches are discarded in Sub-areas VI-VII. Ages modes can, to some extent, be followed from one quarter to the next, especially in Divisions VIIIc-IXaN, although the signal is not very strong. |
author2 |
Araujo-Fernández, M.H. (María Hortensia) Salinas-Aguilera, M.I. (Miren Itxaso) Carrera, P. (Pablo) |
format |
Report |
author |
Pérez-Contreras, María Nélida |
author_facet |
Pérez-Contreras, María Nélida |
author_sort |
Pérez-Contreras, María Nélida |
title |
Results on Atlantic mackerel Spanish Discard Sampling Programme |
title_short |
Results on Atlantic mackerel Spanish Discard Sampling Programme |
title_full |
Results on Atlantic mackerel Spanish Discard Sampling Programme |
title_fullStr |
Results on Atlantic mackerel Spanish Discard Sampling Programme |
title_full_unstemmed |
Results on Atlantic mackerel Spanish Discard Sampling Programme |
title_sort |
results on atlantic mackerel spanish discard sampling programme |
publishDate |
2014 |
url |
http://hdl.handle.net/10508/2069 http://hdl.handle.net/10261/329255 |
op_coverage |
Copenhaguen (Denmark) Atlantic Ocean North Atlantic Northeast Atlantic |
genre |
North Atlantic Northeast Atlantic |
genre_facet |
North Atlantic Northeast Atlantic |
op_relation |
Centro Oceanográfico de Vigo Working Group on Widely Distributed Stocks (WGWIDE). (26/08/2014 - 01/09/2014. Copenhague (Dinamarca)). 2014. - http://hdl.handle.net/10508/2069 http://hdl.handle.net/10261/329255 20036 |
op_rights |
open |
_version_ |
1790604207478276096 |