EFFECT OF GRAZING PRESSURE OF ZOOPLANKTON ON PHYTOPLANKTON ASSEMBLAGE IN LAKE QARUN, EL-FAYOUM, EGYPT | ||||
| Egyptian Journal of Aquatic Biology and Fisheries | ||||
| Article 5, Volume 3, Issue 3, June 1999, Page 81-92 | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejabf.1999.3427 | ||||
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| Authors | ||||
| Gamal El-Shabrawy; Ola Taha | ||||
| National Institute of Oceanography and Fisheries Fish Garden, Algae Lab., Zamalek, Cairo, Egypt | ||||
| Abstract | ||||
| Lake Qarun is an inland closed saline basin, used as a reservoir for agriculture drainage water. The Zooplankton-Phytoplankton interface was studied through 3 in situ experiments. The major conclusion that can be drawn from this study is that zooplankton play a major role in regulation of phytoplankton biomass in lake Qarun during Summer. The grazing pressure of zooplankton was mainly on the nano & pico phytoplanktonic fraction. Brachionus plicatilis was reported to feed exclusively on Nitzschia sigma and N. frustulum var. perpnsilla. | ||||
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