López Mario Monroy, Solano Oscar David
Instituto de Investigaciones Marinas y Costeras INVEMAR, A.A. 1016, Santa Marta, Colombia.
Rev Biol Trop. 2005 Dec;53 Suppl 3:291-7.
In order to know the current condition of the Echinometra lucunter population in the Colombian Caribbean, ten zones of the most representative rocky-shore were selected for sampling between November 2002 and May 2003. In each zone, four transects of 10.25 m2 were located parallel to the coast, and measured with a 0.25 m2 quadrant under the tide level. Two subsamples of 0.01 m2 were chosen from each quadrant, in order to determine the sea urchin heights and its associated fauna. This species was found in nine of the selected zones where the rocky-shore was of sedimentary origin and was absent in Punta Gloria because of the igneous origin of the rock, that the sea urchins cannot bore. The greatest average densities were obtained in Zapsurro and Inca Inca with 69 and 65 ind/m2 respectively; these are high values for the Caribbean Sea, whereas Acandi and Punta Betin had the lowest because of continental water discharges. The most frequent test diameter was between 25 and 40 mm (smaller on the western zones). The density of E. lucunter and of its associated fauna (including the endemic Ophiothrix synoecina) in the Santa Marta area decreased in the last decade.
为了解哥伦比亚加勒比地区光棘球海胆种群的现状，于2002年11月至2003年5月期间，在最具代表性的十个岩石海岸区域进行采样。在每个区域，设置四条与海岸平行、面积为10.25平方米的样带，并在潮位以下用0.25平方米的样方进行测量。从每个样方中选取两个面积为0.01平方米的子样本，以确定海胆的高度及其相关动物群落。在九个选定区域发现了该物种，这些区域的岩石海岸为沉积成因，而在格洛丽亚角未发现，因为那里的岩石为火成岩，海胆无法钻孔。在扎苏罗和印加印加获得了最高的平均密度，分别为69个/平方米和65个/平方米；这对加勒比海来说是很高的值，而阿坎迪和贝廷角的密度最低，原因是有大陆水流注入。最常见的壳径在25至40毫米之间（西部区域较小）。在过去十年中，圣玛尔塔地区光棘球海胆及其相关动物群落（包括地方性的共栖蛇尾）的密度有所下降。
