Article Sidebar
Article Details
The Momona Ethiopian Journal of Science accepts the manuscripts for consideration with the understanding that the manuscript has not been published and is not under consideration for publication elsewhere. Only original articles will be considered for publication if they have been published previously as abstracts, but not if they have been published previously as extended abstract (>1000 words). This applies to both electronic and print versions of the journal. The authors should assign copyright ownership to the Editorial Office of MEJS in the event that the manuscript is accepted for publication in the Momona Ethiopian Journal of Science. All accepted manuscripts must be accompanied by a copyright statement signed by all authors. A copy of the copyright form will be supplied along with the final reviewed version of the manuscript that is sent for final proof- reading. Authors may make multiple copies of the form if necessary and send to the Editorial Office with author’s signature(s) even individually.
All articles published by Momona Ethiopian Journal of Science (MEJS) are Open Access under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0). Under this license, authors retain ownership of the copyright for their content, and anyone can copy, distribute, or reuse articles as long as the author and original source are properly cited. In all these cases for re-use, the authors will be given proper credit to the original publication in MEJS.
Main Article Content
Feeding response of <i>Daphnia</i> cf.<i> similis</i> to different concentration gradients of <i>Microcystis</i> and its implication for preventing algal blooming
Abstract
Daphnia are important components of zooplankton communities in lakes, ponds and reservoirs. Currently freshwater ecosystems are affected worldwide by Cyanobacterial blooms through the process of eutrophication. The objective of this study was to provide experimental evidence to the response of Daphnia to various concentrations of Microcystis. The experiment contained four treatments and two controls each with three replicates. The first control contained D. cf. similis without Microcystis and the second control contained Microcystis without D.cf. similis. The remaining four treatments contained both D. cf. similis and Microcystis at different concentration of Microcystis.. The results showed a significant negative relationships between D. cf. Similis and Microcystis across the treatments (F=294.5; p<0.00). From the four Microcystis concentration gradients, we found mortality of D. cf. Similis in HMC (high Microcystis concentration) and 67% of the original HMC gradient while in the other treatments, in 43% and 22% original HMC treatment, D. cf. Similis reproduce and attain high density. Therefore, from these results it is concluded that D. cf. similis can control the growth of Microcystis if the concentration is low but they cannot reduce an already existing bloom.
Keywords: Concentration gradient, D. cf. Similis, Feeding-treatment, Microcystis, Ethiopia.
