Sea level height, sea surface temperature, and tuna yields in the Panama bight during El Niño
Open accessAbstract
Abstract. Between 1988 and 1998, annual tuna landings at Buenaventura (Colombian Pacific) are correlated with the sea surface temperature in the central Equatorial Pacific (r=0.78, p<0.05) and the sea level height at Buenaventura (r=0.76, p<0.05) and Balboa (Panama) (r=0.79, p<0.05). Seasonal oceanic upwelling is forced by the Panama wind jet, which may favour oceanic fisheries such as tuna. Here we first apply a bivariate correlation method (Pyper and Peterman, 1994) and then a multivariate approach (principal components analysis or PCA) to investigate the relationships of these environmental variables with landings. With the first method, we find that landing is best correlated with the sea surface temperature in the Niño 3 region, whereas the other relationships are less clear. In contrast, with PCA we find that PC1 explains 90.6% of the total variance and suggests that sea surface temperature plays a major role in determining tuna availability in the area (especially during El Niño events). Since PC2 is mainly correlated with sea level height at Balboa but only represents 6.8% of the total variance, we suggest that oceanic upwelling effects on tuna landings at Buenaventura are not significant at interannual scales.
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The temporal fluctuations of tuna catches in the Indian Ocean during El Nino years are confirmed, as reported earlier in the Panama bight (United States) Pacific coast and in the western Pacific.
“Our results provide confirmation that the temporal fluctuations of the catches of tuna species in the Indian Ocean during El Nino years, as reported earlier in the Panama bight (United States) Pacific coast (Pedraza and Dıaz-Ochoa 2006), and in the western Pacific (Lehodey et al. 2008).”
From El Niño Southern Oscillation (ENSO) impact on tuna fisheries in Indian Ocean (2014) · cites this paper as Pedraza and Dıaz-Ochoa 2006
The Discussion reports that tuna landings at Buenaventura varied with the ENSO cycle during the 1990s, supporting the Panama Bight comparison. But the Introduction identifies the study area as the Colombian Pacific, not the United States Pacific coast. The Indian Ocean result is presented as the citing authors’ own finding, not one attributed to this source. (LLM, conf=0.88)
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DINAMIKA PERUBAHAN METODE PENANGKAPAN RAWAI TUNA DI SAMUDERA HINDIA
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- Authors
- Pedraza, M. J., & Díaz Ochoa, J. A.
- Affiliations
- University of Concepción (CL)
- ORCID
- Pedraza, M. J.
- Venue
- Advances in Geosciences
- Publisher
- Copernicus GmbH
- Published
- 2006-01-30
- Volume
- 6
- Pages
- 155-159
- ISSN
- 1680-7340 (ISSN-L)
- 1680-7359
- OpenAlex
- W2166905216
- Cited by
- 11
- References
- 12
- Citations by year
- 2021: 1 · 2019: 1 · 2017: 3 · 2014: 1 · 2013: 1
- FWCI
- 0.93
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Advances in geosciences (publishedVersion, cc-by-nc-sa)
- HAL (submittedVersion, other-oa)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Topics
- Physical Sciences › Environmental Science › Global and Planetary Change › Marine and fisheries research
- Physical Sciences › Environmental Science › Global and Planetary Change › Climate variability and models
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Oceanographic and Atmospheric Processes
- Keywords
- El Niño, sea level, sea surface temperature, tuna landings, Panama Bight, ocean upwelling, fisheries, Buenaventura, Balboa, interannual variability
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