Andere Kunden interessierten sich auch für
![Herpetofaunal distribution and diversity in lower Tana river, Kenya]( "Herpetofaunal distribution and diversity in lower Tana river, Kenya")
Herpetofaunal distribution and diversity in lower Tana river, Kenya32,99 €![Correspondence Respecting the Newfoundland Fisheries, 1884-90 [microform]]( "Correspondence Respecting the Newfoundland Fisheries, 1884-90 [microform]")
Correspondence Respecting the Newfoundland Fisheries, 1884-90 [microform]43,99 €![By-catch Reduction in the World's Fisheries]( "By-catch Reduction in the World's Fisheries")
By-catch Reduction in the World's Fisheries110,99 €![Conservation Efforts for Pied Tamarins (Saguinus bicolor)]( "Conservation Efforts for Pied Tamarins (Saguinus bicolor)")
Conservation Efforts for Pied Tamarins (Saguinus bicolor)26,99 €![Fish diversity in some water bodies of Baro and Tekeze basins, Ethiopia]( "Fish diversity in some water bodies of Baro and Tekeze basins, Ethiopia")
Fish diversity in some water bodies of Baro and Tekeze basins, Ethiopia38,99 €![Missing Links of Ecological Governance in Eastern Ethiopia]( "Missing Links of Ecological Governance in Eastern Ethiopia")
Missing Links of Ecological Governance in Eastern Ethiopia42,99 €![Wildlife Ecology and Management]( "Wildlife Ecology and Management")
Wildlife Ecology and Management45,99 €
![Correspondence Respecting the Newfoundland Fisheries, 1884-90 [microform]](https://bilder.buecher.de/produkte/65/65636/65636542m.jpg "Correspondence Respecting the Newfoundland Fisheries, 1884-90 [microform]")
The fish communities in Ethiopian fresh water systems vary according to the different river basins and environmental conditions. Lake Tana is one of the few African lakes which have not yet been damaged by introduced fish species. Prior to 1986 Lake Tana fisheries consisted of only artisanal, predominantly subsistence reed boat fishery. This type of fishery is limited to the shore areas and targets of the native Nile tilapia (Oreochromis niloticus), beso (Varicorhinus beso) and Labeobarbus using locally made fish traps and small gillnets. For this study the catch and effort records of the three commercial fish species in Lake Tana was used for the analysis. This book describes research findings on the developments of catch and effort in the Lake Tana fisheries and variations of fish stock biomass of this largest Ethiopian Lake between the two periods.