Analysis of null sets (zero catch) made by the Mexican tuna purse seine fleet (2000–2013)
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 have been widely documented and the numbers indicate that they happen in large proportions. In Mexico, the tun...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Universidad Autónoma de Baja California
2015-06-01
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| Series: | Ciencias Marinas |
| Online Access: | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2471 |
| _version_ | 1827331014697943040 |
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| author | Michel J Dreyfus-León Adán Mejía-Trejo Juan Carlos Villaseñor-Derbez |
| author_facet | Michel J Dreyfus-León Adán Mejía-Trejo Juan Carlos Villaseñor-Derbez |
| author_sort | Michel J Dreyfus-León |
| collection | DOAJ |
| description |
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 have been widely documented and the numbers indicate that they happen in large proportions. In Mexico, the tuna fishery represents the second most important fishery by volume and value. The frequency of occurrence of null sets during the period 2000–2013 was analyzed to identify the regions, periods, and oceanographic conditions (e.g., ENSO) related to them. Null sets on free-swimming fish schools and between June and July had a higher relative representation. The region with highest relative occurrence was the mouth of the Gulf of California (between August and October). A positive correlation was observed between the occurrence of null sets on free-swimming fish schools and the Multivariate El Niño Index. The maximum values of occurrence of null sets were related to those months in which the water column structure presented changes. Comprehension of this phenomenon (null sets) and its relation to natural events is of importance for the fishery, as there could be repercussions for the economy and management of the resource.
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| first_indexed | 2024-03-07T16:26:52Z |
| format | Article |
| id | doaj.art-b2b97358056a41a8a20fed29e2947baf |
| institution | Directory Open Access Journal |
| issn | 0185-3880 2395-9053 |
| language | English |
| last_indexed | 2024-03-07T16:26:52Z |
| publishDate | 2015-06-01 |
| publisher | Universidad Autónoma de Baja California |
| record_format | Article |
| series | Ciencias Marinas |
| spelling | doaj.art-b2b97358056a41a8a20fed29e2947baf2024-03-03T17:49:15ZengUniversidad Autónoma de Baja CaliforniaCiencias Marinas0185-38802395-90532015-06-0141210.7773/cm.v41i2.2471Analysis of null sets (zero catch) made by the Mexican tuna purse seine fleet (2000–2013)Michel J Dreyfus-León0Adán Mejía-Trejo1Juan Carlos Villaseñor-Derbez2Instituto Nacional de la PescaUniversidad Autónoma de Baja CaliforniaUniversidad Autónoma de Baja California 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 have been widely documented and the numbers indicate that they happen in large proportions. In Mexico, the tuna fishery represents the second most important fishery by volume and value. The frequency of occurrence of null sets during the period 2000–2013 was analyzed to identify the regions, periods, and oceanographic conditions (e.g., ENSO) related to them. Null sets on free-swimming fish schools and between June and July had a higher relative representation. The region with highest relative occurrence was the mouth of the Gulf of California (between August and October). A positive correlation was observed between the occurrence of null sets on free-swimming fish schools and the Multivariate El Niño Index. The maximum values of occurrence of null sets were related to those months in which the water column structure presented changes. Comprehension of this phenomenon (null sets) and its relation to natural events is of importance for the fishery, as there could be repercussions for the economy and management of the resource. https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2471 |
| spellingShingle | Michel J Dreyfus-León Adán Mejía-Trejo Juan Carlos Villaseñor-Derbez Analysis of null sets (zero catch) made by the Mexican tuna purse seine fleet (2000–2013) Ciencias Marinas |
| title | Analysis of null sets (zero catch) made by the Mexican tuna purse seine fleet (2000–2013) |
| title_full | Analysis of null sets (zero catch) made by the Mexican tuna purse seine fleet (2000–2013) |
| title_fullStr | Analysis of null sets (zero catch) made by the Mexican tuna purse seine fleet (2000–2013) |
| title_full_unstemmed | Analysis of null sets (zero catch) made by the Mexican tuna purse seine fleet (2000–2013) |
| title_short | Analysis of null sets (zero catch) made by the Mexican tuna purse seine fleet (2000–2013) |
| title_sort | analysis of null sets zero catch made by the mexican tuna purse seine fleet 2000 2013 |
| url | https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2471 |
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