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dc.creatorAlvarado Barrientos, Juan José
dc.creatorCortés Núñez, Jorge
dc.creatorGuzmán, Héctor M.
dc.creatorReyes Bonilla, Héctor
dc.date.accessioned2017-09-13T20:23:52Z
dc.date.available2017-09-13T20:23:52Z
dc.date.issued2016
dc.identifier.citationhttp://www.int-res.com/abstracts/ab/v24/n3/p151-161/es_ES
dc.identifier.issn1864-7782
dc.identifier.issn1864-7790
dc.identifier.urihttp://hdl.handle.net/10669/73150
dc.description.abstractDiadema is among the most abundant, widely dispersed, and ecologically important genera of sea urchin in tropical shallow waters. D. mexicanum is distributed from the Gulf of California to northern Peru, including the oceanic islands of Revillagigedo, Clipperton, Coco, Malpelo, and Galápagos, and it is one of the most important sea urchin species in Eastern Tropical Pacific (ETP) coral reefs. In the 1980s, El Niño caused high coral mortality, resulting in an increase in macroalgal cover. This resulted in higher sea urchin bioerosion activity, which weakened the reef frameworks. Considering the high vulnerability of the ETP coral reefs, the aim of this study was to determine regional differences in the density, size (test diameter), and biomass of D. mexicanum at 12 localities in 4 countries between 2009 and 2010, and to determine possible causes of these differences. The average density, size, and biomass of D. mexicanum were 0.47 ± 0.15 ind. m-2, 4.38 ± 1.50 cm, and 0.26 ± 0.33 g m-2. The test size frequency that predominated was 2 to 3 cm. Predation by macrophagous fishes seems to be one of the most important factors that explains the presence of low densities and small size of sea urchins throughout the region. The increase in D. mexicanum predators is probably a result of overfishing of top predators.es_ES
dc.description.sponsorshipUniversidad de Costa Rica//UCR/Costa Ricaes_ES
dc.description.sponsorshipConsejo Nacional de Ciencia y Tecnología//CONACYT/Méxicoes_ES
dc.description.sponsorshipConsejo Nacional para Investigaciones Científicas y Tecnológicas//CONICIT/Costa Ricaes_ES
dc.description.sponsorshipMinisterio de Ciencia y Tecnología//MICIT/Costa Ricaes_ES
dc.description.sponsorshipFonds Français pour l’Environnement Mondial//FFEM/Franciaes_ES
dc.language.isoen_USes_ES
dc.sourceAquatic Biology; Volumen 24, Número 3. 2016es_ES
dc.subjectMarine protected areaes_ES
dc.subjectBiomasses_ES
dc.subjectOrganic matteres_ES
dc.subjectOverfishinges_ES
dc.subjectShelteres_ES
dc.titleDensity, size, and biomass of Diadema mexicanum (Echinoidea) in Eastern Tropical Pacific coral reefses_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.identifier.doi10.3354/ab00645
dc.description.procedenceUCR::Investigación::Unidades de Investigación::Ciencias Básicas::Centro de Investigación en Ciencias del Mar y Limnología (CIMAR)es_ES


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