Show simple item record

Variation in yellowfin tuna (Thunnus albacares) catches related to El Niño-Southern Oscillation events at the entrance to the Gulf of California

dc.creatorARTURO FABIAN EDUARDO MUHLIA MELO
dc.creatorERNESTO TORRES OROZCO
dc.creatorARMANDO TRASVIÑA CASTRO
dc.creatorSOFIA ORTEGA GARCIA
dc.date2006
dc.identifierhttp://cibnor.repositorioinstitucional.mx/jspui/handle/1001/976
dc.identifier.urihttp://dspace.cibnor.mx:8080/handle/123456789/1913
dc.description"Fishery catch data on yellowfin tuna (Thunnus albacares) were examined to study the effects of El Niño events between 1990 and 1999 for an area in the northeastern tropical Pacific (18−24°N, 112−104°W). The data were extracted from a database of logbook records from the Mexican tuna purse-seine fleet. Latitudinal distribution of the catches increased from south to north for the 10-year period. Highest catches and effort were concentrated between 22°N and 23°N. This area accumulated 48% of the total catch over the 10¬year period. It was strongly correlated with El Niño-Southern Oscillation (ENSO) events. At least two periods of exceptionally high catches occurred following El Niño events in 1991 and 1997. Peaks of catches were triggered by the arrival of positive anomalies of sea surface temperature (SST) to the area. A delay of two to four months was observed between the occurrence of maximum SST anomalies at the equator and peaks of catch. Prior to these two events, negative SST anomalies were the dominant feature in the study area and catch was extremely low. This trend of negative SST anomalies with low catches followed by positive SST anomalies and high catches may be attributed to northward yellowfin tuna migration patterns driven by El Niño forcing, a result that contrasts with the known behavior of decreasing relative abundance of these tuna after El Niño events in the eastern Pacific. However, this decrease in relative abundance may be the result of a local or subregional effect."
dc.formatapplication/pdf
dc.languagespa
dc.publisherNational Oceanic and Atmospheric Administration
dc.relationinfo:eu-repo/semantics/reference/URL/URL: https://spo.nmfs.noaa.gov
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.sourceFishery Bulletin
dc.subjectinfo:eu-repo/classification/AUTOR/yellowfin tuna, Gulf of California
dc.subjectinfo:eu-repo/classification/cti/1
dc.subjectinfo:eu-repo/classification/cti/25
dc.subjectinfo:eu-repo/classification/cti/2501
dc.subjectinfo:eu-repo/classification/cti/250906
dc.subjectinfo:eu-repo/classification/cti/250906
dc.titleVariation in yellowfin tuna (Thunnus albacares) catches related to El Niño-Southern Oscillation events at the entrance to the Gulf of California
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record