{"datasetrec":{"DasID":8133,"Acronym":null,"StandardTitle":"Abundance of Diadema antillarum (Echinodermata: Echinoidea) on the coast of Venezuela: 1975-2003","OrigTitle":null,"OrigTitleLangID":null,"OrigTitleLangCode":null,"OrigTitleLang":null,"OrigTitleLangNL":null,"VersionName":null,"ContactEmail":null,"VersionDate":null,"VersionDay":null,"VersionMonth":null,"VersionYear":null,"SizeReference":null,"EngAbstract":"Diadema antillarum is a shallow-water sea-urchin from the tropical Atlantic whose populations almost disappeared in 1983-84, because of widespread mortalities, which reached 87-100%. In Venezuela, urchin population densities before the mortality event were comparable to those of other Caribbean regions; however, later abundancies remain unknown. Daytime samplings were carried out on different dates, evaluating areas that ranged between 22 and 565 square meters. For this, transects were placed with a variable length that depended on the extension of the coral or rocky community present, as well as the distribution of Diadema populations. The sea urchins were quantified using a 1 square meter quadrant as a sampling unit, which was placed along the transect, spaced according to the size of the evaluated area and the characteristics of the coral or reef community (Table 1). Diadema density was referred to as the number of urchins per square meters.","EngDescr":"The objectives of this study were to evaluate the recent densities of certain D. antillarum populations along the Venezuelan coasts and compare the densities at the Parque Nacional Mochima before and after the mortality.\n\nTitle\tProject -  Marine Biodiversity in Venezuela Caribe Sur\nIdentifier -\tBID-CA2020-025-NAC\nFunding -\tCuraduría y movilizacion de datos: Proyecto GBIF-CaribeSur BID-CA2020-025-NAC\n\nA total of six locations on the coast of Venezuela were evaluated, of which five are located on the continental coast (Mochima National Park, Ensenada de Oricao, Ensenada de Chichiriviche de la Costa, Morrocoy National Park, and Cuare Wildlife Refuge) and one in the oceanic area (Los Roques Archipelago National Park) (Fig. 1). The selection of locations was based on the study of reefs and coral communities located mainly in national parks and other areas where Diadema currently exists.\n\nBibliographic Citations\nNoriega, N., Pauls, S. M., & del Mónaco, C. (2006). Abundancia de Diadema antillarum (Echinodermata: Echinoidea) en las costas de Venezuela. Revista de biología tropical, 54(3), 793-802.","OrigAbstract":null,"OrigDescr":null,"Comments":null,"ReleaseDate":"Dec  6 2022 12:00AM","ReleaseDate0":"2022-12-06","OrigDescrLang":null,"EmbargoDate":null,"OrigDescrLangNL":null,"OrigLangCode":null,"OrigLangCodeExtended":null,"OrigLangID":null,"DescrCompFlag":null,"DescrTransFlag":1,"Citation":"Carmona-Suarez C, Scott-Frias J (2022): Abundance of Diadema antillarum (Echinodermata: Echinoidea) on the coast of Venezuela: 1975-2003. 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