Analysis of null sets (zero cat ch) made by the Mexican tuna pur se seine fleet (2000–2013)
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| Format: | Artículo científico |
| Langue: | en |
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Universidad Autónoma de Baja California
2015
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| _version_ | 1876478642740002816 |
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| author | Michel J Dreyfus-León |
| author_facet | Michel J Dreyfus-León |
| contents | Analysis of null sets (zero cat ch) made by the Mexican tuna pur se seine fleet (2000–2013) Michel J Dreyfus-León Adán Mejía-Trejo Juan Carlos Villaseñor-Derbez Ciencias de la Tierra Null sets p urse seine tuna fishi ng eastern Pacific Mexican tuna fleet The world tuna fishing fleet is dominated by purse seine boats . Purse seine sets are sometimes unsuccessful in capturing fish ; these unsuccessful attempts are known as null sets. Null sets h ave been widely documented and the numbers indicate that they h appen in large proportions. In Mexico, the tuna fishery represents the second most important fishery by volume and value. The frequency of oc currence of null sets during the period 2000–2013 wa s analyzed to identify the r egions, periods, and oceanographi c conditions (e.g., ENSO) rela ted to them. Null sets on free-swi mming fish schools and between June and Ju ly had a higher relative representation. The regi on with highest relative occurrence was the mouth of the Gulf of California (between Aug ust and October). A positive co rrelation was observed between t he occurrence of null sets on free-swimming fi sh schools and the Multivariate El Niño Index. The maximum value s of occurrence of null sets w ere related to those months in which the water column structure presented chan ges. Comprehension of this phenom enon (null sets) and its relat ion to natural events is of importance for the fishery, as there could be repe rcussions for the ec onomy and management of the resource. 2015 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48039202001 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.2 Vol.41 |
| format | Artículo científico |
| id | redalyc_48039202001 |
| institution | Redalyc |
| language | en |
| publishDate | 2015 |
| publisher | Universidad Autónoma de Baja California |
| spellingShingle | Analysis of null sets (zero cat ch) made by the Mexican tuna pur se seine fleet (2000–2013) Michel J Dreyfus-León Ciencias de la Tierra Null sets p urse seine tuna fishi ng eastern Pacific Mexican tuna fleet Analysis of null sets (zero cat ch) made by the Mexican tuna pur se seine fleet (2000–2013) Michel J Dreyfus-León Adán Mejía-Trejo Juan Carlos Villaseñor-Derbez Ciencias de la Tierra Null sets p urse seine tuna fishi ng eastern Pacific Mexican tuna fleet The world tuna fishing fleet is dominated by purse seine boats . Purse seine sets are sometimes unsuccessful in capturing fish ; these unsuccessful attempts are known as null sets. Null sets h ave been widely documented and the numbers indicate that they h appen in large proportions. In Mexico, the tuna fishery represents the second most important fishery by volume and value. The frequency of oc currence of null sets during the period 2000–2013 wa s analyzed to identify the r egions, periods, and oceanographi c conditions (e.g., ENSO) rela ted to them. Null sets on free-swi mming fish schools and between June and Ju ly had a higher relative representation. The regi on with highest relative occurrence was the mouth of the Gulf of California (between Aug ust and October). A positive co rrelation was observed between t he occurrence of null sets on free-swimming fi sh schools and the Multivariate El Niño Index. The maximum value s of occurrence of null sets w ere related to those months in which the water column structure presented chan ges. Comprehension of this phenom enon (null sets) and its relat ion to natural events is of importance for the fishery, as there could be repe rcussions for the ec onomy and management of the resource. 2015 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48039202001 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.2 Vol.41 |
| title | Analysis of null sets (zero cat ch) made by the Mexican tuna pur se seine fleet (2000–2013) |
| topic | Ciencias de la Tierra Null sets p urse seine tuna fishi ng eastern Pacific Mexican tuna fleet |
| url | https://www.redalyc.org/articulo.oa?id=48039202001 |