EFFECT OF THE HERBICIDE AMETRYN ON GROWTH AND METABOLIC ACTIVITIES OF SCENEDESMUS QUADRICAUDA, STAURASTRUM NATATOR AND MICROCYSTIS FLOS-AQUAE | ||||
| Egyptian Journal of Aquatic Biology and Fisheries | ||||
| Article 12, Volume 3, Issue 3, June 1999, Page 179-194 | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejabf.1999.3434 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| Ola Taha | ||||
| National Institute of Oceanography and Fisheries Inland Water and Aquaculture Branch. | ||||
| Abstract | ||||
| 9 6-h bioassay experiments were conducted in order to investigate the influence of the herbicide Ametryn on growth and metabolic activities of three freshwater microalgae, namely Scenedesmus quadricauda (Trup) de Brebisson, Staurastrumnatator (W.west) (Chlorophyceae) and Microsystis flos-aquea (wittr) Elenkin (Cyanophyceae). The EC50 values of the herbicide Ametryn for inhibiting growth,chlorophyll a dry weight, carbohydrate lipids and protein were determined. The three tested algae and their tested parameters varied greatly in their response to metryn. Scenedesmus quadricauda was the most susceptible species to Ametryn while - aquae was the most tolerant. Lipid proved to be the tolerant parameter to Ametryn in comparison with the other physiological parameters | ||||
| Keywords | ||||
| Ametryn; Growth; scenedesmus; Microcystis | ||||
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