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Survey on Dispersion and Occurrence Pattern of Sea Cucumbers in the Eastern Part of Chabahar Bay (North of the Oman Sea)
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Arash Shakouri   , Mohamad Bagher Nabavi , Preeta Kochanian , Ahmad Savari , Alireza Safahiye |
| , aarash220@yahoo.com |
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Abstract: (17047 Views) |
| 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. |
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| Keywords: Sea cucumber, Dispersion pattern, Occurrence pattern, Chabahar Bay. |
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Full-Text [PDF 121 kb]
(2315 Downloads)
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Type of Study: Research/ Original/ Regular Article |
Received: 2013/03/31 | Revised: 2013/10/6 | Accepted: 2013/10/6 | ePublished: 2013/10/6
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