Environmental control of Northeast Atlantic mackerel (Scomber scombrus) recruitment in the southern Bay of Biscay: case study of failure in the year 2000
18 pages, 9 figures, 3 tables We investigate the effect of strong meteorological perturbations in early spring on the success of mackerel (Scomber scombrus) recruitment in the N⁄NW Iberian area (southern Bay of Biscay) for the period 1999–2008. In 2000, the year of the most pronounced recruitment fa...
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Format: | Article in Journal/Newspaper |
Language: | English |
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Blackwell Publishing
2011
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Online Access: | http://hdl.handle.net/10261/42249 https://doi.org/10.1111/j.1365-2419.2011.00592.x |
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ftcsic:oai:digital.csic.es:10261/42249 2024-02-11T10:07:05+01:00 Environmental control of Northeast Atlantic mackerel (Scomber scombrus) recruitment in the southern Bay of Biscay: case study of failure in the year 2000 Villamor, Begoña González-Pola, C. Lavín, Alicia Valdés, Luis Lago de Lanzós, A. Franco, C. Cabanas, J. M. Bernal, Miguel Hernández, C. Iglesias, Magdalena Carrera, Pablo Porteiro, C. 2011-09 http://hdl.handle.net/10261/42249 https://doi.org/10.1111/j.1365-2419.2011.00592.x en eng Blackwell Publishing https://doi.org/10.1111/j.1365-2419.2011.00592.x Fisheries Oceanography 20(5): 397-214 (2011) http://hdl.handle.net/10261/42249 doi:10.1111/j.1365-2419.2011.00592.x none Birthdates distribution Environmental conditions Larval distribution Mackerel Recruitment Scomber scombrus artículo http://purl.org/coar/resource_type/c_6501 2011 ftcsic https://doi.org/10.1111/j.1365-2419.2011.00592.x 2024-01-16T09:34:34Z 18 pages, 9 figures, 3 tables We investigate the effect of strong meteorological perturbations in early spring on the success of mackerel (Scomber scombrus) recruitment in the N⁄NW Iberian area (southern Bay of Biscay) for the period 1999–2008. In 2000, the year of the most pronounced recruitment failure on record, two consecutive multidisciplinary surveys sampled hydrographic conditions and mackerel eggs, larvae and post-larvae over the main mackerel spawning grounds of the north and northwest coast of the Iberian Peninsula. Analysis of egg and larval abundance and birthdates based on the otoliths of mackerel juveniles caught between July and October 2000 showed that there were no survivors from the early spring spawns, indicating a massive loss of early spawning effort. Moreover, the abundance of 1-year-old mackerel estimated from an acoustic survey carried out in 2001 was the lowest observed within the 1999–2008 time series. This low or null survival from the early spawns in 2000 could be due to the meteorological and oceanographic conditions of that spring, in particular two storm events in April after a relatively calm March. The first storm event from the north caused strong local wind in the southern Bay of Biscay but a weak oceanographic response. The second storm event from the southwest was mainly felt west of Galicia and caused a notable increase in shelf currents and a shift of the hydrographical structure along the shelf. Detailed analysis of strong wind pulses in early spring within the historical recruitment record suggests that strong local turbulence generated by high wind speeds and advection of larvae caused by the enhancement of shelf currents can contribute to reduced recruitment. Our observations indicate that, in 2000, both mechanisms were present This SEAMAR project (FAIR CT98-3695) was funded by the Commission of the European Communities, Comisión Interministerial de Ciencia y Tecnología (Spain, EC 97⁄0097), and the Instituto Español de Oceanografía. We acknowledge the institutions ... Article in Journal/Newspaper Northeast Atlantic Digital.CSIC (Spanish National Research Council) Fisheries Oceanography 20 5 397 414 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Birthdates distribution Environmental conditions Larval distribution Mackerel Recruitment Scomber scombrus |
spellingShingle |
Birthdates distribution Environmental conditions Larval distribution Mackerel Recruitment Scomber scombrus Villamor, Begoña González-Pola, C. Lavín, Alicia Valdés, Luis Lago de Lanzós, A. Franco, C. Cabanas, J. M. Bernal, Miguel Hernández, C. Iglesias, Magdalena Carrera, Pablo Porteiro, C. Environmental control of Northeast Atlantic mackerel (Scomber scombrus) recruitment in the southern Bay of Biscay: case study of failure in the year 2000 |
topic_facet |
Birthdates distribution Environmental conditions Larval distribution Mackerel Recruitment Scomber scombrus |
description |
18 pages, 9 figures, 3 tables We investigate the effect of strong meteorological perturbations in early spring on the success of mackerel (Scomber scombrus) recruitment in the N⁄NW Iberian area (southern Bay of Biscay) for the period 1999–2008. In 2000, the year of the most pronounced recruitment failure on record, two consecutive multidisciplinary surveys sampled hydrographic conditions and mackerel eggs, larvae and post-larvae over the main mackerel spawning grounds of the north and northwest coast of the Iberian Peninsula. Analysis of egg and larval abundance and birthdates based on the otoliths of mackerel juveniles caught between July and October 2000 showed that there were no survivors from the early spring spawns, indicating a massive loss of early spawning effort. Moreover, the abundance of 1-year-old mackerel estimated from an acoustic survey carried out in 2001 was the lowest observed within the 1999–2008 time series. This low or null survival from the early spawns in 2000 could be due to the meteorological and oceanographic conditions of that spring, in particular two storm events in April after a relatively calm March. The first storm event from the north caused strong local wind in the southern Bay of Biscay but a weak oceanographic response. The second storm event from the southwest was mainly felt west of Galicia and caused a notable increase in shelf currents and a shift of the hydrographical structure along the shelf. Detailed analysis of strong wind pulses in early spring within the historical recruitment record suggests that strong local turbulence generated by high wind speeds and advection of larvae caused by the enhancement of shelf currents can contribute to reduced recruitment. Our observations indicate that, in 2000, both mechanisms were present This SEAMAR project (FAIR CT98-3695) was funded by the Commission of the European Communities, Comisión Interministerial de Ciencia y Tecnología (Spain, EC 97⁄0097), and the Instituto Español de Oceanografía. We acknowledge the institutions ... |
format |
Article in Journal/Newspaper |
author |
Villamor, Begoña González-Pola, C. Lavín, Alicia Valdés, Luis Lago de Lanzós, A. Franco, C. Cabanas, J. M. Bernal, Miguel Hernández, C. Iglesias, Magdalena Carrera, Pablo Porteiro, C. |
author_facet |
Villamor, Begoña González-Pola, C. Lavín, Alicia Valdés, Luis Lago de Lanzós, A. Franco, C. Cabanas, J. M. Bernal, Miguel Hernández, C. Iglesias, Magdalena Carrera, Pablo Porteiro, C. |
author_sort |
Villamor, Begoña |
title |
Environmental control of Northeast Atlantic mackerel (Scomber scombrus) recruitment in the southern Bay of Biscay: case study of failure in the year 2000 |
title_short |
Environmental control of Northeast Atlantic mackerel (Scomber scombrus) recruitment in the southern Bay of Biscay: case study of failure in the year 2000 |
title_full |
Environmental control of Northeast Atlantic mackerel (Scomber scombrus) recruitment in the southern Bay of Biscay: case study of failure in the year 2000 |
title_fullStr |
Environmental control of Northeast Atlantic mackerel (Scomber scombrus) recruitment in the southern Bay of Biscay: case study of failure in the year 2000 |
title_full_unstemmed |
Environmental control of Northeast Atlantic mackerel (Scomber scombrus) recruitment in the southern Bay of Biscay: case study of failure in the year 2000 |
title_sort |
environmental control of northeast atlantic mackerel (scomber scombrus) recruitment in the southern bay of biscay: case study of failure in the year 2000 |
publisher |
Blackwell Publishing |
publishDate |
2011 |
url |
http://hdl.handle.net/10261/42249 https://doi.org/10.1111/j.1365-2419.2011.00592.x |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
https://doi.org/10.1111/j.1365-2419.2011.00592.x Fisheries Oceanography 20(5): 397-214 (2011) http://hdl.handle.net/10261/42249 doi:10.1111/j.1365-2419.2011.00592.x |
op_rights |
none |
op_doi |
https://doi.org/10.1111/j.1365-2419.2011.00592.x |
container_title |
Fisheries Oceanography |
container_volume |
20 |
container_issue |
5 |
container_start_page |
397 |
op_container_end_page |
414 |
_version_ |
1790605215949389824 |