<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0185-3880</journal-id>
<journal-title><![CDATA[Ciencias marinas]]></journal-title>
<abbrev-journal-title><![CDATA[Cienc. mar]]></abbrev-journal-title>
<issn>0185-3880</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma de Baja California, Instituto de Investigaciones Oceanológicas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0185-38802015000200085</article-id>
<article-id pub-id-type="doi">10.7773/cm.v41i2.2471</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Análisis de los lances nulos (sin captura) de la flota atunera mexicana que opera con red de cerco (2000-2013)]]></article-title>
<article-title xml:lang="en"><![CDATA[Analysis of null sets (zero catch) made by the Mexican tuna purse seine fleet (2000-2013)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dreyfus-León]]></surname>
<given-names><![CDATA[Michel J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mejía-Trejo]]></surname>
<given-names><![CDATA[Adán]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villaseñor-Derbez]]></surname>
<given-names><![CDATA[Juan Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de la Pesca Centro Regional de Investigación Acuícola y Pesquera Ensenada ]]></institution>
<addr-line><![CDATA[Ensenada Baja California]]></addr-line>
<country>MX</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Baja California Facultad de Ciencias Marinas ]]></institution>
<addr-line><![CDATA[Ensenada Baja California]]></addr-line>
<country>MX</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma de Baja California Instituto de Investigaciones Oceanológicas ]]></institution>
<addr-line><![CDATA[Ensenada Baja California]]></addr-line>
<country>MX</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2015</year>
</pub-date>
<volume>41</volume>
<numero>2</numero>
<fpage>85</fpage>
<lpage>92</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-38802015000200085&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-38802015000200085&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-38802015000200085&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[A nivel mundial, la flota atunera está dominada por embarcaciones con red de cerco como principal arte de captura. En ocasiones, al realizar los lances, no hay éxito de captura y a esos lances se les conoce como lances nulos. Los lances nulos han sido ampliamente documentados y se ha observado que ocurren en una gran proporción. En México, la pesca de túnidos representa la segunda pesquería más importante en volumen y valor. La finalidad de este trabajo fue analizar la frecuencia de ocurrencia de los lances nulos durante el periodo 2000-2013 para identificar regiones, periodos y condiciones oceanográficas (e.g., El Niño) asociados a éstos. Los lances nulos tuvieron mayor representación relativa cuando se realizaron sobre cardúmenes libres y entre junio y julio. La frecuencia relativa fue máxima en la boca del golfo de California, entre agosto y octubre. Se observó una correlación positiva entre la ocurrencia de lances nulos asociados a cardúmenes independientes y el Índice Multivariado de El Niño. Los valores máximos de ocurrencia de lances nulos estuvieron relacionados con los meses en los que se observan cambios en la estructura de la columna de agua. La comprensión de este fenómeno (lances nulos) y su asociación a eventos naturales es de suma importancia para la pesquería del atún, ya que podrían observarse importantes repercusiones en la economía y el manejo del recurso.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[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.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[lances nulos]]></kwd>
<kwd lng="es"><![CDATA[pesca de atún]]></kwd>
<kwd lng="es"><![CDATA[flota atunera mexicana]]></kwd>
<kwd lng="es"><![CDATA[Pacifico oriental]]></kwd>
<kwd lng="es"><![CDATA[red de cerco]]></kwd>
<kwd lng="en"><![CDATA[null sets]]></kwd>
<kwd lng="en"><![CDATA[tuna fishing]]></kwd>
<kwd lng="en"><![CDATA[Mexican tuna fleet]]></kwd>
<kwd lng="en"><![CDATA[eastern Pacific]]></kwd>
<kwd lng="en"><![CDATA[purse seine]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Three-dimensional distribution of larval fish assemblages in anticyclonic Eddy in a semi enclosed sea (Gulf California)]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Contreras-Catala]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez-Velásco]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Lavín]]></surname>
<given-names><![CDATA[MF]]></given-names>
</name>
<name>
<surname><![CDATA[Godínez]]></surname>
<given-names><![CDATA[VM]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Plankton Res]]></source>
<year>2012</year>
<volume>34</volume>
<page-range>548-62</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Statistics of the purse seine Spanish fleet in the Indian Ocean (1984-2009)]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Delgado de Molina]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Areso]]></surname>
<given-names><![CDATA[JJ]]></given-names>
</name>
<name>
<surname><![CDATA[Ariz]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[IOTC- 2010-WPTT-19]]></source>
<year>2010</year>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Lances de agua (primera parte)]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dreyfus-León]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Mejía]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[El Vigia]]></source>
<year>2009</year>
<numero>35</numero>
<issue>35</issue>
<page-range>3-4</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Lances de agua (segunda parte)]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dreyfus León]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Mejía]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[El Vigia]]></source>
<year>2009</year>
<numero>36</numero>
<issue>36</issue>
<page-range>11-3</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Durazo]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Ramírez-Manguilar]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Miranda]]></surname>
<given-names><![CDATA[LE]]></given-names>
</name>
<name>
<surname><![CDATA[Soto-Mardones]]></surname>
<given-names><![CDATA[LA.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Climatología de variables hidrográficas]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Gaxiola- Castro]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Durazo]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<source><![CDATA[Dinámica del Ecosistema Pelágico frente a Baja California, 1997-2007. Diez años de investigaciones mexicanas de la Corriente de California]]></source>
<year>2010</year>
<page-range>25-58</page-range><publisher-name><![CDATA[Secretaría de Medio Ambiente y Recursos Naturales]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Statistics of the French purse seine fleet targeting tropical tunas in the Atlantic Ocean (1991-2010)]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Floch]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Chassot]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Damiano]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Fonteneau]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Kouassi]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Cauquil]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Amandé]]></surname>
<given-names><![CDATA[MJ]]></given-names>
</name>
<name>
<surname><![CDATA[Pianet]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Chavance]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Collect]]></source>
<year>2012</year>
<volume>68</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>858-85</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fonteneau]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Pallares]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Pianet]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A worldwide review of purse seine fisheries on FADs]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Le Gall]]></surname>
<given-names><![CDATA[JY]]></given-names>
</name>
<name>
<surname><![CDATA[Cayré]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Taquet]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<source><![CDATA[Pêche thonière et dispositifs de concentration de poissons]]></source>
<year>2000</year>
<page-range>15-35</page-range><publisher-name><![CDATA[Actes Colloques-Ifremer]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Relationship of the thermocline to success of purse seining for tuna]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Green]]></surname>
<given-names><![CDATA[RE]]></given-names>
</name>
</person-group>
<source><![CDATA[Trans. Am. Fish. Soc.]]></source>
<year>1967</year>
<volume>96</volume>
<page-range>126-30</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hall]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Lennert-Cody]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Arenas]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Miller]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The association of tunas with floating objects and dolphins in the eastern Pacific Ocean: A review of the current purse-seine fishery]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Scott]]></surname>
<given-names><![CDATA[MD]]></given-names>
</name>
<name>
<surname><![CDATA[Bayliff]]></surname>
<given-names><![CDATA[WH]]></given-names>
</name>
<name>
<surname><![CDATA[Lennert-Cody]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Schaefer]]></surname>
<given-names><![CDATA[KM]]></given-names>
</name>
</person-group>
<source><![CDATA[Proceedings of the International Workshop on the Ecology and Fisheries for Tunas Associated with Floating Objects]]></source>
<year>1992</year>
<volume>11</volume>
<page-range>87-194</page-range><publisher-name><![CDATA[Inter-American Tropical Tuna Commission]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="">
<collab>Inter-American Tropical Tuna Commission</collab>
<source><![CDATA[Tunas and billfishes in the eastern Pacific Ocean in 2013. Document IATTC-87-03a]]></source>
<year>2014</year>
</nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<article-title xml:lang=""><![CDATA[Chapter 3.1.1: Purse Seine]]></article-title>
<collab>International Commission for the Conservation of Atlantic Tuna</collab>
<source><![CDATA[ICCAT Manual]]></source>
<year>2008</year>
<page-range>1-34</page-range><publisher-name><![CDATA[ICCAT]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Mesoscale eddies in the southern Gulf of California during summer: Characteristics and interaction with the wind stress]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lavín]]></surname>
<given-names><![CDATA[MF]]></given-names>
</name>
<name>
<surname><![CDATA[Castro]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Beier]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Godínez]]></surname>
<given-names><![CDATA[VM]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Geophys. Res. (Oceans)]]></source>
<year>2013</year>
<volume>118</volume>
<page-range>1367-81</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Primaryproductivity in theeastern tropical Pacific off Cabo Corrientes, Mexico = Productividad primaria en el Pacífico oriental tropical adyacente a Cabo Corrientes, México]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[López-Sandoval]]></surname>
<given-names><![CDATA[DC]]></given-names>
</name>
<name>
<surname><![CDATA[Lara-Lara]]></surname>
<given-names><![CDATA[JR]]></given-names>
</name>
<name>
<surname><![CDATA[Lavín]]></surname>
<given-names><![CDATA[MF]]></given-names>
</name>
<name>
<surname><![CDATA[Álvarez-Borrego]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Gaxiola Castro]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<source><![CDATA[Cienc. Mar.]]></source>
<year>2009</year>
<volume>35</volume>
<page-range>169-82</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Factores ambientales y pesca atunera de superficie en el mar Caribe]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Medina-Gaertner]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Gaertner]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Col. Vol. Sci. Pap. ICCAT]]></source>
<year>1991</year>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[French purse seine tuna fisheries statistics in the Indian Ocean, 1981-2008]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pianet]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Nordstrom]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Dewals]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[I0TC-2009- WPTT-23]]></source>
<year>2009</year>
</nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Análisis de los datos obtenidos por observadores en atuneros cerqueros españoles en el océano Atlántico durante las últimas moratorias sobre objetos flotantes (2001-2002 y 2002-2003)]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sarralde]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Ariz]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Delgado de Molina]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Pallarés]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Santana]]></surname>
<given-names><![CDATA[JC]]></given-names>
</name>
</person-group>
<source><![CDATA[Collect Vol. Sci. Pap. ICCAT]]></source>
<year>2004</year>
<volume>56</volume>
<page-range>401-13</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="">
<collab>SEMARNAT</collab>
<source><![CDATA[Secretaría de Medio Ambiente y Recursos Naturales. 2000. Pesquería del atún]]></source>
<year></year>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Summer generation of the southern Gulf of California eddy train]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zamudio]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Hogan]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Metzger]]></surname>
<given-names><![CDATA[EJ.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Geophys. Res.]]></source>
<year>2008</year>
<volume>113</volume>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
