<?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>2215-3470</journal-id>
<journal-title><![CDATA[Uniciencia]]></journal-title>
<abbrev-journal-title><![CDATA[Uniciencia]]></abbrev-journal-title>
<issn>2215-3470</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional, Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2215-34702023000100542</article-id>
<article-id pub-id-type="doi">10.15359/ru.37-1.29</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Sensibilidad de Hydra attenuata e Hydra viridis a los plaguicidas diuron y etoprofos,Costa Rica]]></article-title>
<article-title xml:lang="en"><![CDATA[Sensitivity of Hydra attenuata and Hydra viridis to diuron and ethoprophos pesticides,Costa Rica]]></article-title>
<article-title xml:lang="pt"><![CDATA[Sensibilidade de Hydra attenuata e Hydra viridis aos pesticidas diuron e etoprofós, Costa Rica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jones]]></surname>
<given-names><![CDATA[Caroline]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ugalde]]></surname>
<given-names><![CDATA[María del Rocío]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez]]></surname>
<given-names><![CDATA[Katherine]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mena]]></surname>
<given-names><![CDATA[Freylan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[Seiling]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Facultad de Ciencias de la Tierra y el Mar Escuela de Ciencias Ambientales]]></institution>
<addr-line><![CDATA[Heredia ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Instituto Regional de Estudios em Sustancias Tóxicas Laboratorio de Ecotoxicología]]></institution>
<addr-line><![CDATA[Heredia ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional Instituto Regional de Estudios em Sustancia Tóxicas Laboratorio de Ecotoxicología]]></institution>
<addr-line><![CDATA[Heredia ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional Instituto Regional de Estudios em Sustancias Tóxicas Laboratorio de Ecotoxicología]]></institution>
<addr-line><![CDATA[Heredia ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Nacional Instituto Regional de Estudios em Sustancias Tóxicas Laboratorio de Análisis de Plaguicidas]]></institution>
<addr-line><![CDATA[Heredia ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>37</volume>
<numero>1</numero>
<fpage>542</fpage>
<lpage>561</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S2215-34702023000100542&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S2215-34702023000100542&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S2215-34702023000100542&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  (Objetivo) El objetivo fue determinar cuál de las dos especies de hidras (Hydraattenuatao Hydraviridis) resultaba más sensible a dos plaguicidas,para luego usar la como parte de la batería de organismos de prueba del Laboratorio de Estudios Ecotoxicológicos(ECOTOX).  (Metodología) Para esto se utilizaron diluciones dedos de los plaguicidas más común mente usados en el cultivo de piña en Costa Rica y detectados en muestras de agua: el herbicida diuron y el insecticida etoprofos. Se realizaron bioensayos de toxicidad con cada una de estas sustancias y con una mezcla de estas.Se registró el estado morfológico de las hidras. Además,se evaluaron la concentración de efecto medio (EC50), la concentración letal media (LC50),y las interacciones de toxicidad según tres posibilidades: antagónica, aditiva o sinérgica.  (Resultados) La H. attenuata fue la especiemás sensible a ambos plaguicidas, con LC50s de 16,84mg/L y 103,01mg/L; y EC50s de 4,24mg/L y 23,74mg/L paradiuron y etoprofos, respectivamente. Mientras tanto la H. viridistuvo LC50s de 36,94mg/L y 103,01mg/L, con EC50s de 13,64mg/L y 53,12mg/L, también para diuron y etoprofos, respectivamente. La exposiciónal a mezcla de plaguicidas solo causó mortalidad a la H.viridis y tuvo efectos inérgico en ambas especies.  (Conclusiones) Estos resultados sugieren que la H. attenuata es la especie más apropiada para la evaluación de efectos de plaguicidas, pero se deben realizar más estudios sobre las interacciones de los contaminantes en mezclas, porque estas pueden modificar su toxicidad para diferentes especies.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  (Objective) The objective wasto determine which of the two hydra species (Hydraattenuata or Hydraviridis) was more sensitive to two pesticides, and the nuse the most sensitive species as part of the battery of testorganisms of the Ecotoxicological Studies Laboratory (ECOTOX).  (Methodology) For this purpose, dilutions of two of the most comm only used pesticides in pineapple cultivation in CostaRica which were detectedin water samples were used: the herbicide diuron and the insecticide ethoprophos. Toxicity bioassays were conducted with each of the sesubstances and with amixture of the sesubstances.Themorphological state of the hydras was recorded. Inaddition,the mean effective concentration (EC50), mean lethal concentration (LC50) andtoxicity interactions wer evaluated interm sof three possibilities: antagonistic, additiveor synergistic.  (Results) H. attenuata as the most sensitive species to both pesticides,withan LC50sof16.84mg/Land103.01mg/L, and an EC50sof4.24mg/Land23.4mg/L for diuronan dethoprophos, respectively. Furthermore, H. viridishadan LC50sof36.94mg/Land103.01mg/L, withan EC50sof13.64mg/Land53.12mg/L, also for diuronande thoprophos, respectively. Exposure to the pesticide mixture only caused mortality in H.viridisandhadas y nergistic effect on both species.  (Conclusions) These results suggest that H. attenuata is the most appropriate species for the evaluation of pesticide effects, but fur the rstudies should be conducted on the interactions of contaminants in mixtures, since these may modify their toxicity for different species.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo  (Objetivo):  O objetivo foi determinar qual das duas espécies de hydra (Hydra attenuata ou Hydra viridis) era mais sensível a dois pesticidas, para ser usada como parte da bateria de organismos de teste do Laboratório de Estudos Ecotoxicológicos (ECOTOX).  (Metodologia):  Foram usadas diluições de dois dos pesticidas mais comumente aplicados no cultivo de abacaxi na Costa Rica e detectados em amostras de água: o herbicida diuron e o inseticida etoprofós. Foram realizados bioensaios de toxicidade com cada uma dessas substâncias e com uma mistura delas. Foi registrado o status morfológico das hidras. Além disso, a concentração de efeito médio (CE50), a concentração letal média (CL50) e as interações de toxicidade foram avaliadas de acordo com três possibilidades: antagônica, aditiva ou sinérgica.  (Resultados)  A H. attenuata foi a espécie mais sensível a ambos os pesticidas, com CL50s de 16,84 mg/L e 103,01 mg/L; e CE50s de 4,24 mg/L e 23,74 mg/L para diuron e etoprofós, respectivamente. Enquanto isso, o H. viridis apresentou CL50s de 36,94 mg/L e 103,01 mg/L, com CL50s de 13,64 mg/L e 53,12 mg/L, também para diuron e etoprofós, respectivamente. A exposição à mistura de pesticidas causou mortalidade apenas em H. viridis e teve um efeito sinérgico em ambas as espécies.  (Conclusões):  Esses resultados sugerem que a H. attenuata é a espécie mais adequada para a avaliação dos efeitos dos pesticidas, mas estudos adicionais sobre as interações de contaminantes em misturas devem ser realizados, pois as misturas podem modificar sua toxicidade para diferentes espécies.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[diuron]]></kwd>
<kwd lng="es"><![CDATA[etoprofos]]></kwd>
<kwd lng="es"><![CDATA[toxicidad]]></kwd>
<kwd lng="es"><![CDATA[piña]]></kwd>
<kwd lng="en"><![CDATA[diuron]]></kwd>
<kwd lng="en"><![CDATA[ethoprophos]]></kwd>
<kwd lng="en"><![CDATA[toxicity]]></kwd>
<kwd lng="en"><![CDATA[pineapple]]></kwd>
<kwd lng="pt"><![CDATA[Hydra]]></kwd>
<kwd lng="pt"><![CDATA[diuron]]></kwd>
<kwd lng="pt"><![CDATA[etoprofós]]></kwd>
<kwd lng="pt"><![CDATA[toxicidade]]></kwd>
<kwd lng="pt"><![CDATA[abacaxi.]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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