Prieto Antulio, Ruiz Lilia J, García Natividad
Departamento de Biologia, Escuela de Ciencias, Universidad de Oriente. Aptdo. 245, Cumaná, Venezuela.
Rev Biol Trop. 2005 Mar-Jun;53(1-2):135-40.
The diversity of a sublittoral epifaunal mollusk community of Punta Patilla, Sucre State, Venezuela, was studied from September 1990 to September 1991. We identified 25 species (14 bivalves and 11 gastropods) of mollusks that inhabit gravel, soft sand and bottoms covered by Thalassia testudinum. Total diversity indices were H' = 3.42. J' = 0.74 and 1-D = 0.85. Monthly diversity reached its maximum in March 1991 (3.12 bits/ ind.), June 1991 (2.88 bits/ind.) and September 1991 (2.95 bits/ind.); minimum diversity was recorded in August 1991 (1.20 bits/ind.). A log series model showed a diversity index alpha = 4.56 for species abundance data and alpha = 3.11 for biomass data. The more abundant species were Chione cancellata, Anigona listeri, Chione granulata and Area zebra among the bivalves, and Chicoreus brevifrons, Turritella variegata and Phllonotus pomum among the gastropods (which present maximum biomass). The average total biomass (56.80 g/m2) is low when compared to reports from other tropical zones.
1990年9月至1991年9月，对委内瑞拉苏克雷州帕蒂利亚角潮下带浅海动物区系的软体动物群落多样性进行了研究。我们鉴定出25种软体动物（14种双壳类和11种腹足类），它们栖息在砾石、软沙以及被泰来草覆盖的海底。总多样性指数为H' = 3.42、J' = 0.74和1-D = 0.85。月度多样性在1991年3月（3.12比特/个体）、1991年6月（2.88比特/个体）和1991年9月（2.95比特/个体）达到最大值；最低多样性记录于1991年8月（1.20比特/个体）。对数级数模型显示，物种丰度数据的多样性指数α = 4.56，生物量数据的α = 3.11。双壳类中较为丰富的物种有栉孔扇贝、利氏异篮蛤、粒突箱形扇贝和斑马蚶，腹足类中较为丰富的物种有短喙岩螺、多色塔螺和苹果拟荔枝螺（它们具有最大生物量）。与其他热带地区的报告相比，平均总生物量（56.80克/平方米）较低。
