RELATIONSHIP BETWEEN PHYTOPLANKTON, ZOOPLANKTON AND FISH CULTURE IN A FRESHWATER FISH FARM | ||||
| Egyptian Journal of Aquatic Biology and Fisheries | ||||
| Article 10, Volume 6, Issue 2, April 2002, Page 183-206 PDF (1.86 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejabf.2002.1746 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Adel M ageed; Add Konsowa | ||||
| Nat. Inst Ocean. Fish., 101 Kasr AI Ainy St., Cairo, Egypt | ||||
| Abstract | ||||
| This study was carried out at the Barrage Fish Farm during 2001 farming season. It was performed to evaluate the plankton communities and the effect of fishponds on their standing crop and species composition.The data revealed that the phytoplankton communities are represented by five classes namely Chlorophyceae,BaciHariophyceae, Cyanophyceae, Dinophyceae and Euglenophyceae. Their major peak was observed at Pond 6 while the minor one was found at Pond 5. With regard to the monthly variations, phytoplankton communities flourished in July while their minimum occurrence occurred in September and August. The zooplankton species belonged to rotifers, cladocerans, and copepods in addition to the meroplanktonic forms. Rotifers were most common in all ponds. It constituted 94.64% of total zooplankton in the ponds. Copepoda occupied the second predominant position and contributed 4.23% of total zooplankton crop. Cladocera was dominated by Moina micrura. The average zooplankton number at the ponds was 258.4 orgT , their major peak of 1073 org.l"1 was observed at Pond 3 in April, while the minor one of 20 org.1"1 occurred at Pond 5.Fish culture had obviously influenced the intraplanktonic dynamics, Chlorophyceae occupied the first predominant position at the fishponds and constituted about 60% of the total crop followed by Bacillariophyceae (25.8%) and Cyanophyceae (14%). Diatoms replaced green algal position at the River Nile water and contributed about 70% of the total numerical density. The small rotifers and nauplius larvae of copepods were the most dominant in fishponds in spite of the large forms in the main feeder. | ||||
| Keywords | ||||
| Fish culture; Oreochromis niloticus; fertilization; physico-chemical parameters; phytoplankton; Zooplankton; trace metals; fish predation | ||||
|
Statistics Article View: 437 PDF Download: 2,968 |
||||
