ICES Working Group on Mackerel and Horse Mackerel Egg Surveys (WGMEGS: outputs from 2020 meeting)
The ICES Working Group on Mackerel and Horse Mackerel Egg Surveys (WGMEGS) coordinates the mackerel and horse mackerel egg survey in the Northeast Atlantic (NEA) and the mackerel egg survey in the North Sea. The working group plans and reports on these surveys, with recent attention focused on the e...
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Centro Oceanográfico de Vigo
2021
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Online Access: | http://hdl.handle.net/10508/12476 https://doi.org/10.17895/ices.pub.7899 |
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ftieo:oai:repositorio.ieo.es:10508/12476 2023-05-15T17:41:45+02:00 ICES Working Group on Mackerel and Horse Mackerel Egg Surveys (WGMEGS: outputs from 2020 meeting) Costas, G. (Gersom) Riveiro, I. (Isabel) Garabana-Barro, D. (Dolores) Solla-Covelo, A. (Antonio) Sampedro-Pastor, P. (Paz) Costas, G. (Gersom) Kloppmann, M. 2021 http://hdl.handle.net/10508/12476 https://doi.org/10.17895/ices.pub.7899 eng eng Centro Oceanográfico de Vigo https://doi.org/10.17895/ices.pub.7899 2618-1371 http://hdl.handle.net/10508/12476 Working Group on Mackerel and Horse Mackerel Egg Surveys. (2020 - 2020. online). 2021. doi:10.17895/ices.pub.7899 open access fish surveys exploration volume data collections report 2021 ftieo https://doi.org/10.17895/ices.pub.7899 2023-02-08T00:49:42Z The ICES Working Group on Mackerel and Horse Mackerel Egg Surveys (WGMEGS) coordinates the mackerel and horse mackerel egg survey in the Northeast Atlantic (NEA) and the mackerel egg survey in the North Sea. The working group plans and reports on these surveys, with recent attention focused on the execution of the surveys given the increasing demands related to covering the expanding survey area as well as balanced fecundity sampling. WGMEGS also addresses data quality assurance in macke-rel fecundity and total annual egg production estimation.Currently, there are 3 surveys in place which are carried out triennially and deliver standing stock bio-mass (SSB) indices: (1) the survey for the western and southern stock components of the NEA mackerel stock, as well as for the western horse mackerel stock, (2) the survey for the NEA mackerel North Sea stock component, and (3) the survey for the southern horse mackerel stock.For the North Sea component, the egg survey in 2017 revealed an estimated egg production of 201*1012, resulting in an SSB of 287*103 tons. This is a strong increase of more than 100*103 tons com-pared to 2015 (SSB = 170*103 tons). While peak spawning in the North Sea was covered, the coverage of the complete spawning season and area was insufficient to produce a reliable estimate of survey in-dices.In 2019, the application of an alternate transect survey design made it possible to survey the persis-tently expanding mackerel spawning area and season. Northern and northwestern spawning bounda-ries for mackerel during survey periods 5 (weeks 19 – 22) and 6 (weeks 23 – 26) were not fully deline-ated. Peak spawning was observed in period 4 (weeks 16 – 18). Subsequent analyses of survey results in conjunction with results from exploratory surveys in the inter-survey-years showed that the mackerel core spawning area was covered and a reliable estimate of mackerel annual egg production was deliv-ered. The estimate of total mackerel egg production was 1.64*1015, which is a decrease of 7.6% com-pared to that ... Report Northeast Atlantic Instituto Español de Oceanografía: e-IEO Deline ENVELOPE(-123.406,-123.406,65.198,65.198) |
institution |
Open Polar |
collection |
Instituto Español de Oceanografía: e-IEO |
op_collection_id |
ftieo |
language |
English |
topic |
fish surveys exploration volume data collections |
spellingShingle |
fish surveys exploration volume data collections Costas, G. (Gersom) Riveiro, I. (Isabel) Garabana-Barro, D. (Dolores) Solla-Covelo, A. (Antonio) Sampedro-Pastor, P. (Paz) ICES Working Group on Mackerel and Horse Mackerel Egg Surveys (WGMEGS: outputs from 2020 meeting) |
topic_facet |
fish surveys exploration volume data collections |
description |
The ICES Working Group on Mackerel and Horse Mackerel Egg Surveys (WGMEGS) coordinates the mackerel and horse mackerel egg survey in the Northeast Atlantic (NEA) and the mackerel egg survey in the North Sea. The working group plans and reports on these surveys, with recent attention focused on the execution of the surveys given the increasing demands related to covering the expanding survey area as well as balanced fecundity sampling. WGMEGS also addresses data quality assurance in macke-rel fecundity and total annual egg production estimation.Currently, there are 3 surveys in place which are carried out triennially and deliver standing stock bio-mass (SSB) indices: (1) the survey for the western and southern stock components of the NEA mackerel stock, as well as for the western horse mackerel stock, (2) the survey for the NEA mackerel North Sea stock component, and (3) the survey for the southern horse mackerel stock.For the North Sea component, the egg survey in 2017 revealed an estimated egg production of 201*1012, resulting in an SSB of 287*103 tons. This is a strong increase of more than 100*103 tons com-pared to 2015 (SSB = 170*103 tons). While peak spawning in the North Sea was covered, the coverage of the complete spawning season and area was insufficient to produce a reliable estimate of survey in-dices.In 2019, the application of an alternate transect survey design made it possible to survey the persis-tently expanding mackerel spawning area and season. Northern and northwestern spawning bounda-ries for mackerel during survey periods 5 (weeks 19 – 22) and 6 (weeks 23 – 26) were not fully deline-ated. Peak spawning was observed in period 4 (weeks 16 – 18). Subsequent analyses of survey results in conjunction with results from exploratory surveys in the inter-survey-years showed that the mackerel core spawning area was covered and a reliable estimate of mackerel annual egg production was deliv-ered. The estimate of total mackerel egg production was 1.64*1015, which is a decrease of 7.6% com-pared to that ... |
author2 |
Costas, G. (Gersom) Kloppmann, M. |
format |
Report |
author |
Costas, G. (Gersom) Riveiro, I. (Isabel) Garabana-Barro, D. (Dolores) Solla-Covelo, A. (Antonio) Sampedro-Pastor, P. (Paz) |
author_facet |
Costas, G. (Gersom) Riveiro, I. (Isabel) Garabana-Barro, D. (Dolores) Solla-Covelo, A. (Antonio) Sampedro-Pastor, P. (Paz) |
author_sort |
Costas, G. (Gersom) |
title |
ICES Working Group on Mackerel and Horse Mackerel Egg Surveys (WGMEGS: outputs from 2020 meeting) |
title_short |
ICES Working Group on Mackerel and Horse Mackerel Egg Surveys (WGMEGS: outputs from 2020 meeting) |
title_full |
ICES Working Group on Mackerel and Horse Mackerel Egg Surveys (WGMEGS: outputs from 2020 meeting) |
title_fullStr |
ICES Working Group on Mackerel and Horse Mackerel Egg Surveys (WGMEGS: outputs from 2020 meeting) |
title_full_unstemmed |
ICES Working Group on Mackerel and Horse Mackerel Egg Surveys (WGMEGS: outputs from 2020 meeting) |
title_sort |
ices working group on mackerel and horse mackerel egg surveys (wgmegs: outputs from 2020 meeting) |
publisher |
Centro Oceanográfico de Vigo |
publishDate |
2021 |
url |
http://hdl.handle.net/10508/12476 https://doi.org/10.17895/ices.pub.7899 |
long_lat |
ENVELOPE(-123.406,-123.406,65.198,65.198) |
geographic |
Deline |
geographic_facet |
Deline |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
https://doi.org/10.17895/ices.pub.7899 2618-1371 http://hdl.handle.net/10508/12476 Working Group on Mackerel and Horse Mackerel Egg Surveys. (2020 - 2020. online). 2021. doi:10.17895/ices.pub.7899 |
op_rights |
open access |
op_doi |
https://doi.org/10.17895/ices.pub.7899 |
_version_ |
1766143484038742016 |