MONTHLY VARAITIONS AND SUCCESSION OF ROTIFERA IN WADI ELRAYAN AREA IN RELATION TO SOME PHYSICAL AND CHEMICAL CONDITIONS | ||||
| Egyptian Journal of Aquatic Biology and Fisheries | ||||
| Article 14, Volume 3, Issue 3, June 1999, Page 217-243 | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejabf.1999.3436 | ||||
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| Author | ||||
| Gamal El-shabrawy | ||||
| National Institute of Oceanography & Fisheries , El-Kanater Fish Research Station, El-Kanater El-Kyryia, , Egypt | ||||
| Abstract | ||||
| In Wadi El-Rayan area, two successiv lakes at different levels were created as a reservoir for drainage wastewater from agriculture lands. In the area under investigation rotifers were represented by 34 species,of which 6 were recorded for the first time, namely:Brachionus falcutus, Monostyla quadridentata, Lecane ledwigi, transparency, dissolved oxygen and chlorosity seem to be the most important factors controlling succession of these rotifers in Wadi El-Rayan area. Generally, rotifers were well represented in the two lakes, as compared with the situation in the other areas. Statistical analysis showed a highly similarity index (45.2) between El-Wadi drain and El-Banat canal, followed by first lake and connecting channel (34.3). The second lake revealed the lowest similarity index with other sites and sustained the lowest richness and equitability values of 1.93 and 0.35, respectively. | ||||
| Keywords | ||||
| Rotifera; Wadi El-Rayan; Ecology | ||||
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