Description: Das Projekt "Ein holistischer Ansatz zur Restaurierung der Umweltbedingungen im Land-Wasser-Oekoton des Chamosees und seinem benachbarten Nationalpark (Sued-Aethiopien)" wird vom Umweltbundesamt gefördert und von Forschungsverbund Berlin, Leibniz-Institut für Gewässerökologie und Binnenfischerei durchgeführt. Lake Chamo has been considered as an inexhaustible source of Nile Perch (Lates niloticus), a delicious fish protein for the Arbaminch town and luxury hotels in Addis Ababa, Ethiopia. Nevertheless the biomass of this fish has been declined to the point of extinction in recent years. Even though the Agriculture bureau of the region has put an effort to conserve this fish species it could not come into practice ever since. The decline of Nile Perch and also other fish species and occasional wild life kill from toxicity can be attributed to the following possible reasons: Firstly, there was an introduction of a new and Nile Perch selective net, locally called as 'Gancho', meaning 'no way to escape', after fishermen found that this net was so strong and efficient in catching the biggest possible size of this fish species selectively. Secondly, the ecological balance of the lake is severely disturbed in terms of fish-crocodile biomass. This is possible since the Crocodile Ranching program nearby the two lakes Abaya and Chamo, releases baby crocodiles (10 percent of the catch) at an unrecorded rate. Crocodiles are the king of these lakes. Hunting is prohibited and therefore they only die a natural death, while the fish stock is under great tension both from the crocodiles, birds and hundreds of fishermen. Thirdly, the lake's chemical and biological nature might have changed. There is no monitoring action that is underway. The size and population number of the Arbaminch town is sharply increasing along with new human activities. Yet, the town has no waste water treatment plant. Every solid and liquid waste is washed down to this lake. For several years pesticides have been under use in the nearby cotton farm. The development of occasional algal bloom is possibly due to this and agricultural practices in the catchment.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Algenblüte ? Schädlingsbekämpfungsmittel ? Barsch ? Krokodil ? Fischart ? Biopharmazeutikum ? Fisch ? Gewässerökologie ? Vogel ? Seen ? Berlin ? Bevölkerungswachstum ? Ackerbau ? Fischbestand ? Ökologie ? Säugling ? Wild ? Äthiopien ? Flüssiger Abfall ? Baumwolle ? Landwirtschaftlicher Betrieb ? Abwasserbehandlung ? Pflanzenschutzmittelanwendung ? Abwasserbehandlungsanlage ? Nil ? Binnenfischerei ? Chemikalien ? Fischereiwirtschaft ? Flachwasser ? Mensch ? Monitoring ? Nationalpark ? Protein ? Stadt ? Wildlebende Tiere und Pflanzen ? Jagd ? Bewirtschaftungssystem ? Standortbedingung ? Landwirtschaft ? Biomasse ? Ökologisches Gleichgewicht ? Sanierung ? Population ? See [Binnengewässer] ? Aethiopien ?
Region: Berlin
Bounding box: 10.44987° .. 10.44987° x 54.03573° .. 54.03573°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1997-04-01 - 2000-09-30
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