title: [Temporary abundance variation of Coralliophila abbreviata and Coralliophila caribaea (Mollusca, Coralliophilidae) in a coral reef at Morrocoy National Park].
abstract: The mollusks Coralliophila abbreviata and C. caribaea are coral predators in the Caribbean Sea . We evaluated the temporal variability of abundance and size structure of C. abbreviata and C. caribaea in Cayo Sombrero, Morrocoy National Park, Venezuelar (September 2004 - August 2005). The density of C. abbreviata and C. caribaea was evaluated monthly by means of two 50-meter long transects paralell to the coast line, at 3 m and 6 m deep; aditionally, 30 individuals of C. abbreviata were collected to measure size. The densities of C. abbreviata at the shallow transect fluctuated between 1.78 ind/m2 in September and 6.26 ind/m2 in May. The densities at the deep transect fluctuated between 4.23 ind/m2 in January and 7.66 ind/m2 in May. The densities of C. caribaea at the shallow transect fluctuated between 0 Ind/m2 (except in September) and 0.03 Ind/m2 (September) and the densities at the deep transect fluctuated between 0 Ind/m2 (October to March and July) and 0.1 Ind/m2 (April). Most individuals of C. abbreviata and C. caribaea measured between 12 and 16 mm and between 10 and 15 mm long respectively.
authors.affiliation: Laboratorio de Estudios Marino Costeros, Universidad Central de Venezuela, Caracas, Venezuela. carlosdelmonaco@gmail.com
authors.forename: Carlos
authors.initials: C
authors.lastname: del Mónaco
authors.forename: Estrella
authors.initials: E
authors.lastname: Villamizar
authors.forename: Samuel
authors.initials: S
authors.lastname: Narciso
mesh_terms: D000818:Animals; D008974:Mollusca / Q000033:anatomy & histology / Q000145:classification*; D011156:Population Density; D011157:Population Dynamics; D012621:Seasons; D012623:Seawater; D014687:Venezuela