出版社：Regional Information Center for Science and Technology (RICeST)
摘要：This research has carried out on the eastern part of Chabahar Bay, the region with the highest human effects on the ecosystem. Four stations were selected. In each station, four quadrates with 200 m2 area sampled by SCUBA method. Investigations occurred in the middle month of each season. Dispersion of subtidal sea cucumbers was determined by index of dispersion test. Frequency of occurrence of species calculated. Stichopus variegatus and Holothuria leucospilota are permanent species with cumulative distribution. H. hilla is a common species with random distribution in winter and cumulative distribution in other seasons. H. pervicax is a rare species with cumulative distribution, although it is observed only in the spring. H. arenicola (rare sp.), H. atra (commomn sp.) and H. parva (rare sp.) have a random distribution. In spite of these results, the observation of sea cucumbers in their habitats indicates that distribution of such animals have a cumulative pattern. Difference between field observation and statistical calculations is due to the fact that all sea cumbers which according to calculations had random distribution, only observed in 1 or 2 quadrates in a few individuals (1 or 2) and should not be assigned as animals with random distribution. The most important reasons for cumulative distribution of sea cucumbers are aggregation of nutrients and used habitats that in the searching area were rocky.
