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Malacofauna terrestre asociada a los cayos de la región central del golfo de Ana María, Cuba
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Author
Hernández Alvarez, D.Date
2012
Metadata
Show full item recordAbstract
El presente estudio se realizó en octubre del 2011 y marzo del 2012 en la región central del golfo de Ana María. Se determinó la composición y densidad de las comunidades de moluscos terrestres mediante el método de conteo directo en parcelas cuadradas. Para cada individuo, se anotó la especie vegetal, estrato vertical y microhábitat usado. Se encontraron las especies Cerion sanctacruzense, Cerion sp., Cerion sp.1 y Hemitrochus maculifera, distribuidas en cinco de los cayos visitados. Las dos primeras especies se observaron en dos cayos y las restantes en una localidad solamente. Los mayores valores de densidad se reportaron en octubre del 2011 para C. sanctacruzense (1,77 ind/m²) y Cerion sp. (1,70 ind/m²) en los cayos Santa María de Afuera y Palomo, respectivamente. Por el contrario, H. maculifera mostró el menor valor para esta variable (0,08 ind/m²) en la última localidad referida. Se observaron moluscos terrestres asociados al 32% de las plantas vasculares listadas para estos cayos, y el mayor número de especies de plantas usadas se observó en Santa María de Afuera y Algodón Grande. Para las cuatro especies de moluscos, el mayor número de individuos se distribuyó en el primer estrato de la vegetación (0-1 m) en todas las localidades muestreadas. Los microhábitat más usados por C. sanctacruzense y Cerion sp. fueron las vainas de Coccothrinax litoralis y la superficie foliar en Algodón Grande y Palomo, respectivamente; así como los tallos por Cerion sp. en Algodoncito y Cerion sp.1 en Bergantines.Land snails communities were surveyed in the central region of the Ana María gulf in October 2011 and March 2012. Both species density and composition were determined by using the direct count method and data were collected from 5x5 m quadrants. For each individual, the supporting plant species, vertical stratum and microhabitat used were concurrently noted. During the two sampling periods, four mollusk species were tallied (Cerion sanctacruzense, Cerion sp., Cerion sp.1 y Hemitrochus maculifera) along five keys. The two former species were distributed in two different localities, meanwhile the remainder was only found in one key. Species density reached maxima values in October 2011 by C. sanctacruzense (1,77 ind/m²) and Cerion sp. (1,70 ind/m²) in Santa María de Afuera and Palomo keys, respectively. On the contrary, H. maculifera exhibited the lowest density value (0,08 ind/m²) in the latter locality. Land snails were found in association with the 32% of the vascular plant species detected during the surveys; and the highest number of those supporting plants was reported in Santa María de Afuera and Algodón Grande keys. Most individuals of the four mollusk species were recorded in the lowest vegetation stratum (0-1 m) throughout the study site. Amongst the microhabitat more frequently used, Coccothrinax litoralis sheaths and leaves were preferred by C. sanctacruzense and Cerion sp. in Algodón Grande and Palomo keys, respectively; as well as stems by Cerion sp. in Algodoncito and Cerion sp.1 in Bergantines.
Journal
Revista de Investigaciones MarinasVolume
32Issue/Article Nr
2Collections
Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by-nc/3.0/