Wavelet analysis of correlation among Canary Islands octopus captures per unit effort, sea-surface temperatures and the North Atlantic Oscillation
Short-term fluctuations in the octopus catches off the Canary Islands have been attributed to changes in the sea surface temperature (SST) and the North Atlantic Oscillation (NAO) pattern. These results have been found using stationarity assumptions. However, the behavior of environmental systems is...
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2012
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Online Access: | http://hdl.handle.net/10553/6831 https://doi.org/10.1016/j.fishres.2010.10.019 |
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ftunivlaspalmas:oai:accedacris.ulpgc.es:10553/6831 2023-05-15T17:29:45+02:00 Wavelet analysis of correlation among Canary Islands octopus captures per unit effort, sea-surface temperatures and the North Atlantic Oscillation Polanco, J. Ganzedo López, Unai Sáenz, J. Caballero Alfonso, Ángela María Castro, J.J. 27467791100 27367924300 7006174511 35298359200 55976902600 3120852 2846404 945275 8837004 4843423 WOS:Polanco, J WOS:Ganzedo, U WOS:Saenz, J WOS:Caballero-Alfonso, AM WOS:Castro-Hernandez, JJ 2012-01-12T05:00:16Z application/pdf http://hdl.handle.net/10553/6831 https://doi.org/10.1016/j.fishres.2010.10.019 eng eng Fisheries Research 107 0165-7836 WoS http://hdl.handle.net/10553/6831 doi:10.1016/j.fishres.2010.10.019 78650305625 000287113600019 619119 -;-;-;-;1499 1872-6763 1-3 by-nc-nd info:eu-repo/semantics/openAccess CC-BY-NC-ND Fisheries research [ISSN 0165-7836], v. 107 (1-3), p. 177-183 2401 Biología animal (zoología) 2510 Oceanografía Time-Series Analysis Climate Variability Oceanic Island Indian-Ocean Growth Recruitment Octopus Vulgaris Canary Islands North Atlantic Oscillation (Nao) Sea Surface Temperature (Sst) Correlation Analysis Cross Wavelet Analysis WorkingPaper info:eu-repo/semantics/Article Article 2012 ftunivlaspalmas https://doi.org/10.1016/j.fishres.2010.10.019 2020-06-02T23:08:16Z Short-term fluctuations in the octopus catches off the Canary Islands have been attributed to changes in the sea surface temperature (SST) and the North Atlantic Oscillation (NAO) pattern. These results have been found using stationarity assumptions. However, the behavior of environmental systems is not always linear, and environmental time series do not always satisfy the statistical property of stationarity. Wavelet spectral analysis is a methodology which can deal with non-linear, non-stationary and noisy time series. Cross wavelet analysis (wavelet coherence) is applied to investigate the environmental effects (SST, NAO) on octopus abundance fluctuations measured as capture per unit of effort (CPUE) from 1989 to 2007 in the waters of the Canary Islands. A slightly positive correlation exists between NAO and CPUE at lags and leads of a few months. Additionally, a good relationship between SST and CPUE exists on the same seasonal scale, but there is a relatively weak relationship between SST anomalies and the NAO. When the analysis is extended to the interannual scale, the wavelet coherence identifies a statistically significant relationship between CPUE and NAO, but this does not happen when the wavelet coherence between CPUE and SST is computed. These results suggest that fluctuations in octopus catches could be the result of SST fluctuations but in synergy with other unknown environmental variables which are also affected by the NAO pattern. 183 177 7 Article in Journal/Newspaper North Atlantic North Atlantic oscillation Universidad de Las Palmas de Gran Canaria: Acceda Indian Fisheries Research 107 1-3 177 183 |
institution |
Open Polar |
collection |
Universidad de Las Palmas de Gran Canaria: Acceda |
op_collection_id |
ftunivlaspalmas |
language |
English |
topic |
2401 Biología animal (zoología) 2510 Oceanografía Time-Series Analysis Climate Variability Oceanic Island Indian-Ocean Growth Recruitment Octopus Vulgaris Canary Islands North Atlantic Oscillation (Nao) Sea Surface Temperature (Sst) Correlation Analysis Cross Wavelet Analysis |
spellingShingle |
2401 Biología animal (zoología) 2510 Oceanografía Time-Series Analysis Climate Variability Oceanic Island Indian-Ocean Growth Recruitment Octopus Vulgaris Canary Islands North Atlantic Oscillation (Nao) Sea Surface Temperature (Sst) Correlation Analysis Cross Wavelet Analysis Polanco, J. Ganzedo López, Unai Sáenz, J. Caballero Alfonso, Ángela María Castro, J.J. Wavelet analysis of correlation among Canary Islands octopus captures per unit effort, sea-surface temperatures and the North Atlantic Oscillation |
topic_facet |
2401 Biología animal (zoología) 2510 Oceanografía Time-Series Analysis Climate Variability Oceanic Island Indian-Ocean Growth Recruitment Octopus Vulgaris Canary Islands North Atlantic Oscillation (Nao) Sea Surface Temperature (Sst) Correlation Analysis Cross Wavelet Analysis |
description |
Short-term fluctuations in the octopus catches off the Canary Islands have been attributed to changes in the sea surface temperature (SST) and the North Atlantic Oscillation (NAO) pattern. These results have been found using stationarity assumptions. However, the behavior of environmental systems is not always linear, and environmental time series do not always satisfy the statistical property of stationarity. Wavelet spectral analysis is a methodology which can deal with non-linear, non-stationary and noisy time series. Cross wavelet analysis (wavelet coherence) is applied to investigate the environmental effects (SST, NAO) on octopus abundance fluctuations measured as capture per unit of effort (CPUE) from 1989 to 2007 in the waters of the Canary Islands. A slightly positive correlation exists between NAO and CPUE at lags and leads of a few months. Additionally, a good relationship between SST and CPUE exists on the same seasonal scale, but there is a relatively weak relationship between SST anomalies and the NAO. When the analysis is extended to the interannual scale, the wavelet coherence identifies a statistically significant relationship between CPUE and NAO, but this does not happen when the wavelet coherence between CPUE and SST is computed. These results suggest that fluctuations in octopus catches could be the result of SST fluctuations but in synergy with other unknown environmental variables which are also affected by the NAO pattern. 183 177 7 |
author2 |
27467791100 27367924300 7006174511 35298359200 55976902600 3120852 2846404 945275 8837004 4843423 WOS:Polanco, J WOS:Ganzedo, U WOS:Saenz, J WOS:Caballero-Alfonso, AM WOS:Castro-Hernandez, JJ |
format |
Article in Journal/Newspaper |
author |
Polanco, J. Ganzedo López, Unai Sáenz, J. Caballero Alfonso, Ángela María Castro, J.J. |
author_facet |
Polanco, J. Ganzedo López, Unai Sáenz, J. Caballero Alfonso, Ángela María Castro, J.J. |
author_sort |
Polanco, J. |
title |
Wavelet analysis of correlation among Canary Islands octopus captures per unit effort, sea-surface temperatures and the North Atlantic Oscillation |
title_short |
Wavelet analysis of correlation among Canary Islands octopus captures per unit effort, sea-surface temperatures and the North Atlantic Oscillation |
title_full |
Wavelet analysis of correlation among Canary Islands octopus captures per unit effort, sea-surface temperatures and the North Atlantic Oscillation |
title_fullStr |
Wavelet analysis of correlation among Canary Islands octopus captures per unit effort, sea-surface temperatures and the North Atlantic Oscillation |
title_full_unstemmed |
Wavelet analysis of correlation among Canary Islands octopus captures per unit effort, sea-surface temperatures and the North Atlantic Oscillation |
title_sort |
wavelet analysis of correlation among canary islands octopus captures per unit effort, sea-surface temperatures and the north atlantic oscillation |
publishDate |
2012 |
url |
http://hdl.handle.net/10553/6831 https://doi.org/10.1016/j.fishres.2010.10.019 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Fisheries research [ISSN 0165-7836], v. 107 (1-3), p. 177-183 |
op_relation |
Fisheries Research 107 0165-7836 WoS http://hdl.handle.net/10553/6831 doi:10.1016/j.fishres.2010.10.019 78650305625 000287113600019 619119 -;-;-;-;1499 1872-6763 1-3 |
op_rights |
by-nc-nd info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.fishres.2010.10.019 |
container_title |
Fisheries Research |
container_volume |
107 |
container_issue |
1-3 |
container_start_page |
177 |
op_container_end_page |
183 |
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1766124556071731200 |