DREAMER-2 Cruise, RV Sarmiento de Gamboa
DREAMER-2 Cruise (29SG20170617) carried out on the Research Vessel Sarmiento de Gamboa in 2017 The European hake, Merluccius merluccius L., is one of the most important economical fisheries in the North-East Atlantic that also plays a key role in the marine ecosystem. After the implementation by the...
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Online Access: | http://hdl.handle.net/10261/232063 https://doi.org/10.20351/29SG20170617 |
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ftcsic:oai:digital.csic.es:10261/232063 2024-02-11T10:06:54+01:00 DREAMER-2 Cruise, RV Sarmiento de Gamboa Saborido-Rey, Fran Álvarez, Paula CSIC - Unidad de Tecnología Marina (UTM) 2017 http://hdl.handle.net/10261/232063 https://doi.org/10.20351/29SG20170617 unknown https://doi.org/10.20351/29SG20170617 http://hdl.handle.net/10261/232063 doi:10.20351/29SG20170617 none http://aims.fao.org/aos/agrovoc/c_2e39cd42 http://aims.fao.org/aos/agrovoc/c_3473 Expediciones Merluza dataset http://purl.org/coar/resource_type/c_ddb1 2017 ftcsic https://doi.org/10.20351/29SG20170617 2024-01-16T11:03:53Z DREAMER-2 Cruise (29SG20170617) carried out on the Research Vessel Sarmiento de Gamboa in 2017 The European hake, Merluccius merluccius L., is one of the most important economical fisheries in the North-East Atlantic that also plays a key role in the marine ecosystem. After the implementation by the EU of various recovery plans for both stocks, the spawning biomass has recently recuperated, after more than two decades under the security limits. However, recruitment remains highly variable, and in the case of the Southern stock (SS) still decreasing. The overall objective of the project is to analyze the causes that determine hake recruitment with special attention to the demographic and environmental causes and focusing in particular in the seasonal differences in the spawning pattern (SS hake shows two spawning peaks, in late winter and late spring-summer), larval distribution, trophic dynamics of larvae, seasonal differences in recruitment and connectivity patterns between stocks. To achieve these objectives the project will carry out two research surveys, in March and June 2017 within the main hake spawning area, between Cape Finisterre and Eo estuary. The main goals of the surveys are to determine the distributional pattern of hake larvae and the factors determining the observed pattern (climatic, oceanographic and foraging) and collecting biological samples in several life stages: from larvae to young of the year recruits. March survey (DRE0317) was divided in two legs. The first one aimed to characterize environmental conditions and larval abundance along 18 transects orthogonal to the coast, covering the whole research area, and summing 114 fixed stations. Each transect was drawn every 8 nautical miles, while the stations within transect was separated every 4 nm. In each station it was performed an oblique Bongo (60 cm, 500 m mesh size), a vertical pairovet (60 and 150 m) and a CTD profile to estimate hake larval abundance, ichthyoplankton community, micro and mesozooplankton and oceanographic ... Dataset North East Atlantic Digital.CSIC (Spanish National Research Council) Hake ENVELOPE(15.612,15.612,66.797,66.797) Sarmiento ENVELOPE(-68.000,-68.000,-72.000,-72.000) |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
topic |
http://aims.fao.org/aos/agrovoc/c_2e39cd42 http://aims.fao.org/aos/agrovoc/c_3473 Expediciones Merluza |
spellingShingle |
http://aims.fao.org/aos/agrovoc/c_2e39cd42 http://aims.fao.org/aos/agrovoc/c_3473 Expediciones Merluza Saborido-Rey, Fran Álvarez, Paula CSIC - Unidad de Tecnología Marina (UTM) DREAMER-2 Cruise, RV Sarmiento de Gamboa |
topic_facet |
http://aims.fao.org/aos/agrovoc/c_2e39cd42 http://aims.fao.org/aos/agrovoc/c_3473 Expediciones Merluza |
description |
DREAMER-2 Cruise (29SG20170617) carried out on the Research Vessel Sarmiento de Gamboa in 2017 The European hake, Merluccius merluccius L., is one of the most important economical fisheries in the North-East Atlantic that also plays a key role in the marine ecosystem. After the implementation by the EU of various recovery plans for both stocks, the spawning biomass has recently recuperated, after more than two decades under the security limits. However, recruitment remains highly variable, and in the case of the Southern stock (SS) still decreasing. The overall objective of the project is to analyze the causes that determine hake recruitment with special attention to the demographic and environmental causes and focusing in particular in the seasonal differences in the spawning pattern (SS hake shows two spawning peaks, in late winter and late spring-summer), larval distribution, trophic dynamics of larvae, seasonal differences in recruitment and connectivity patterns between stocks. To achieve these objectives the project will carry out two research surveys, in March and June 2017 within the main hake spawning area, between Cape Finisterre and Eo estuary. The main goals of the surveys are to determine the distributional pattern of hake larvae and the factors determining the observed pattern (climatic, oceanographic and foraging) and collecting biological samples in several life stages: from larvae to young of the year recruits. March survey (DRE0317) was divided in two legs. The first one aimed to characterize environmental conditions and larval abundance along 18 transects orthogonal to the coast, covering the whole research area, and summing 114 fixed stations. Each transect was drawn every 8 nautical miles, while the stations within transect was separated every 4 nm. In each station it was performed an oblique Bongo (60 cm, 500 m mesh size), a vertical pairovet (60 and 150 m) and a CTD profile to estimate hake larval abundance, ichthyoplankton community, micro and mesozooplankton and oceanographic ... |
format |
Dataset |
author |
Saborido-Rey, Fran Álvarez, Paula CSIC - Unidad de Tecnología Marina (UTM) |
author_facet |
Saborido-Rey, Fran Álvarez, Paula CSIC - Unidad de Tecnología Marina (UTM) |
author_sort |
Saborido-Rey, Fran |
title |
DREAMER-2 Cruise, RV Sarmiento de Gamboa |
title_short |
DREAMER-2 Cruise, RV Sarmiento de Gamboa |
title_full |
DREAMER-2 Cruise, RV Sarmiento de Gamboa |
title_fullStr |
DREAMER-2 Cruise, RV Sarmiento de Gamboa |
title_full_unstemmed |
DREAMER-2 Cruise, RV Sarmiento de Gamboa |
title_sort |
dreamer-2 cruise, rv sarmiento de gamboa |
publishDate |
2017 |
url |
http://hdl.handle.net/10261/232063 https://doi.org/10.20351/29SG20170617 |
long_lat |
ENVELOPE(15.612,15.612,66.797,66.797) ENVELOPE(-68.000,-68.000,-72.000,-72.000) |
geographic |
Hake Sarmiento |
geographic_facet |
Hake Sarmiento |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_relation |
https://doi.org/10.20351/29SG20170617 http://hdl.handle.net/10261/232063 doi:10.20351/29SG20170617 |
op_rights |
none |
op_doi |
https://doi.org/10.20351/29SG20170617 |
_version_ |
1790604935172194304 |