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Research Journal of Environmental Sciences
  Year: 2007 | Volume: 1 | Issue: 5 | Page No.: 200-210
DOI: 10.3923/rjes.2007.200.210
 
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Monthly Variations in Abundance and Species Composition of the Epipelagic Zooplankton off Sharm El-Sheikh, Northern Red Sea

Mohsen M. El-Sherbiny , Mahmoud H. Hanafy and Maher A. Aamer

Abstract:
Seasonal changes in zooplankton abundance and species composition were investigated at one station off Sharm El-Sheikh, northern Red Sea, during May 2005 to May 2006. A total of 99 taxa and species were identified. Three main peaks of zooplankton abundance were observed in summer (July-August), in autumn (November) and in late spring (May). However, the different species within the zooplankton community displayed an obvious succession throughout the year. Copepods overwhelmingly dominated both in terms of abundance (mean: 84.7%) and diversity (68 genus and species). Most of the recorded copepod species have world-wide tropical and subtropical distribution. Other abundant groups were mollusc larvae (6.8%) and larvaceans (2.4%) which were particularly numerous during summer period. Adult copepods constituted only 22.3% of total copepods, with Clausocalanus sp., Oithona plumifera, O. nana, Oncaea scottodicarloi, O. mediterranea and Paracalanus sp. Ctenocalanus vanus, Calocalanus styliremis, Microsetella rosa, Corycaeus sp. and C. gibbulus being the most abundant species. Seasonal variations showed that Oithona nana, Corycaeus sp. and C. gibbulus and cladocerans (Evadne tergestina) dominated the summer communities, whereas in winter calanoid copepods Clausocalanus sp. were predominated. While in autumn Oithona plumifera, Microsetella rosae, Oncaea scottodicarloi, O. mediterranea were flourished.
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How to cite this article:

Mohsen M. El-Sherbiny , Mahmoud H. Hanafy and Maher A. Aamer , 2007. Monthly Variations in Abundance and Species Composition of the Epipelagic Zooplankton off Sharm El-Sheikh, Northern Red Sea . Research Journal of Environmental Sciences, 1: 200-210.

DOI: 10.3923/rjes.2007.200.210

URL: https://scialert.net/abstract/?doi=rjes.2007.200.210

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