<?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>0034-7744</journal-id>
<journal-title><![CDATA[Revista de Biología Tropical]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. biol. trop]]></abbrev-journal-title>
<issn>0034-7744</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-77442021000500202</article-id>
<article-id pub-id-type="doi">10.15517/rbt.v69isuppl.1.46353</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Reproduction of the sea urchin Tripneustes depressus (Camarodonta: Toxopneustidae) in Bahía de La Paz, Baja California Sur, Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Reproducción del erizo de mar Tripneustes depressus (Camarodonta: Toxopneustidae) en Bahía de La Paz, Baja California Sur, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vives]]></surname>
<given-names><![CDATA[Ailet]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rubilar]]></surname>
<given-names><![CDATA[Tamara]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrero-Pérezrul]]></surname>
<given-names><![CDATA[María-Dinorah]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ceballos-Vázquez]]></surname>
<given-names><![CDATA[Bertha-Patricia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional  ]]></institution>
<addr-line><![CDATA[ Baja California Sur]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional de la Patagonia San Juan Bosco  ]]></institution>
<addr-line><![CDATA[ Chubut]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Centro para el Estudio de Sistemas Marinos  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<volume>69</volume>
<fpage>202</fpage>
<lpage>218</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0034-77442021000500202&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0034-77442021000500202&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0034-77442021000500202&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction:  Sea urchin gonads (roe or uni) are considered a culinary delicacy worldwide. However, only a few species are considered edible and commercialized. The sea urchin Tripneustes depressus has generated the interest of producers in Baja California Sur, Mexico, due to the quality of its gonads. A biological basis for designing a management strategy is key to consider its commercial exploitation.  Objective:  To determine the reproductive season of T. depressus through description of the gonad stages and reproductive cycle, and to establish its relationship with environmental factors.  Methods:  We collected monthly samples (October 2016-September 2017), recording in-situ temperature and photoperiod. We evaluated a sample of 1 055 specimens for demographic characteristics, using total weight (g) and test diameter (cm). We also did a histological analysis of gonads from 178 individuals.  Results:  Average test diameter was 9.70 ± 0.03 cm (5-12.50 cm). Based on the proportion into the gonad of sexual (gametes) and somatic (nutritive phagocytes) cells, we propose five gonad stages (growing, premature, mature, spawning, and intergametic) for both sexes. There were two times of the year when gonads were heaviest and closely corresponded to the growing stage, coinciding with the highest proportions of nutritive phagocytes. Gonad development (growing and premature stages) peaks in the months with the longest daylight periods, with spawning in the shortest daylight periods.  Conclusions:  Gonad wet weight and adjusted gonad weight are good indicators of the reproductive season of T. depressus. The lowest gonad wet weights were matched the spawning peak in the shortest daylight period (January and March).]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción:  Las gónadas de erizo de mar (huevas o uni) se consideran un manjar culinario en todo el mundo. Sin embargo, solo unas pocas especies se consideran comestibles y se comercializan. El erizo de mar Tripneustes depressus ha generado el interés de productores de Baja California Sur, México, por la calidad de sus gónadas. Una base biológica es clave para diseñar una estrategia de manejo para T. depressus para considerar su explotación comercial.  Objetivo:  Determinar la época reproductiva de T. depressus a través de la descripción de los estadios de las gónadas y del ciclo reproductivo, y establecer su relación con factores ambientales.  Métodos:  Recolectamos muestras mensuales (octubre de 2016 a septiembre de 2017), registrando in-situ la temperatura y el fotoperiodo. Evaluamos una muestra de 1055 especímenes para las características demográficas, utilizando el peso total (g) y el diámetro de testa (cm). También hicimos el análisis histológico de las gónadas de 178 individuos.  Resultados:  El diámetro de la testa promedio fue de 9.70 ± 0.03 cm (5-12.50 cm). Con base en la proporción en la gónada de células sexuales (gametos) y somáticas (fagocitos nutritivos), proponemos cinco estadios gonádicos (crecimiento, prematuro, maduro, desove e intergamético) para ambos sexos. Hubo dos épocas del año en que las gónadas eran más pesadas y se correspondían estrechamente con la etapa de crecimiento, coincidiendo con las proporciones más altas de fagocitos nutritivos. El desarrollo de las gónadas (etapas de crecimiento y prematuro) alcanza su punto máximo en los meses con los periodos de luz más largos, con desove en los periodos de luz más cortos.  Conclusiones:  El peso húmedo de las gónadas y el peso ajustado de las gónadas son buenos indicadores de la temporada reproductiva de T. depressus. Los pesos húmedos más bajos de las gónadas coincidieron con el pico de desove en el período con luz diurna más corto (enero y marzo).]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[reproductive season]]></kwd>
<kwd lng="en"><![CDATA[adjusted gonad weights]]></kwd>
<kwd lng="en"><![CDATA[gonadal stages]]></kwd>
<kwd lng="en"><![CDATA[urchin roe]]></kwd>
<kwd lng="en"><![CDATA[Echinoidea]]></kwd>
<kwd lng="es"><![CDATA[temporada reproductiva]]></kwd>
<kwd lng="es"><![CDATA[pesos de gónadas ajustados]]></kwd>
<kwd lng="es"><![CDATA[estadios gonadales]]></kwd>
<kwd lng="es"><![CDATA[hueva de erizo]]></kwd>
<kwd lng="es"><![CDATA[Echinoidea]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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