Arcas A P, Omar Ramos A, Arrieche D, Villalba J, Lodeiros C
Departamento de Biología, Escuela de Ciencias, Núcleo de Sucre, Universidad de Oriente, (UDO), Apdo. 245, Cumaná, Venezuela.
Rev Biol Trop. 2001 Jun;49(2):599-607.
Production and condition index of a turkeywing (Arca zebra) population were studied from August 1984 to August 1985 in Pariche, Cariaco Gulf, Venezuela. Production was studied through bimonthly collections using a method designed for populations with continuous reproduction and indistinguishable age classes. The population distribution was stable with a mean density of 37 ind.m-2. A production of 131.61 g dry weight m-2 year-1 was calculated from data on density, biomass and weight increase along the year. Highest production was between February 1985 and August 1985 (65%) and concentrated in individuals 60.00-79.95 mm long (45.73%). There was large seasonal variation in the mean monthly condition index (IC = (Ps/Ph) x 100) in the two size classes examined: it reached a maximum in July 1985 (26.84%) and a minimum in January 1985 (16.31%).
1984年8月至1985年8月期间，在委内瑞拉卡里亚科湾的帕里切对一种扇贝（斑马蚶）种群的产量和状况指数进行了研究。通过双月采集来研究产量，采用的方法是专门针对具有连续繁殖且年龄组难以区分的种群设计的。种群分布稳定，平均密度为37个/平方米。根据全年的密度、生物量和体重增加数据，计算出的产量为131.61克干重/平方米·年。最高产量出现在1985年2月至1985年8月之间（占65%），且集中在长度为60.00 - 79.95毫米的个体中（占45.73%）。在所研究的两个大小类别中，平均每月状况指数（IC = (Ps/Ph) x 100）存在很大的季节性变化：在1985年7月达到最高值（26.84%），在1985年1月达到最低值（16.31%）。
