Lake Ziway fisheries: Past and recent trends in exploitation and implication for management
Main Article Content
Abstract
The ultimate objective of fishery management in is to maintain the maximum sustainable yield. This objective has not been achieved in most of the world’s managed fisheries which could be attributed to both bias in the methodologies and inappropriate management strategies; whereas the latter outweighs in the Ethiopian rift valley lakes. Frame surveys were conducted around Lake Ziway to examine changes in fishing patterns and the quantity and composition of yield from the fishery. It was found out that the total fish yield has declined from 3180 to 1127 tonnes per year between the year 1997 and 2010. Beach seining, a common fishing method in the lake was also reduced from 123 in 1995 to 68 in 2010. Catch composition of the lake has also changed, with a decline in Oreochromis niloticus, but a progressive increment in Clarias gariepinus and Carassius carassius. The yield from the introduced fish species C. gariepinus and C. carassius has declined from 426 and 102 tonnes per year from q995 to 2010. The implication of current moves from open access to co-management was also discussed.
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
How to Cite
Share
References
Abdurhman, K. A. (2002). Users’ attitudes toward fisheries management on Lake Ziway, Ethiopia. MSc Thesis. Norwegian College of Fishery Science. University of Tromsø. Norway.
Allison E. and Badjeck M (2004). Fisheries Co-Management in Inland Waters: A Review of International Experience. Sustainable Fisheries Livelihoods Programme (SFLP). FAO/DFID pp. 116.
Brodziak, J. and Link, J. (2002). Ecosystem-based fishery management: What is it and how can we do it? Bulletin of Marine Science 70: 586-611.
Clark, C. W. (2006). The Worldwide Crisis in Fisheries. Cambridge: Cambridge University Press.
Felegeselam Yohanes (2003). Management of Lake Ziway Fisheries in Ethiopia. M.Sc Thesis, University of Tromsø, 60 pp.
Garcia, S.M., Allison, E.H., Andrew, N., Béné, C., Bianchi, G., De Graaf, G., Kalikoski, D., Mahon, R.L., and Orensanz, L. (2008). Towards integrated assessment and advice in small-scale fisheries: principles and processes. FAO Fisheries and Aquaculture Technical Paper No. 515.
Globstov, A. S., Dgebuadze, Y., Y., and Mina, M. V. (2002). Fishes of the Ethiopian rift valley. In: Ethiopian Rift Valley Lakes. pp. 167-256 (Tudorance, C. and Taylor, W.D. eds). Backhuys publishers, Leiden.
Hanna, S. S. (1995). User participation and fishery management performance within the Pacific Fishery Management Council. Ocean and Coastal Management 28:23-44.
Jentoft, S and McCay. B. (1995). User participation in fisheries management - lessons drawn from international experiences. Marine Policy 19:227-246.
Katon B, Pomeroy R, Salamanca, A. (1997). The marine conservation project for San Salvador: a case study of fisheries co-management in the Philippines. Fisheries Co-management Research Project Working Paper no. 23. Manila: ICLARM.
King, M. (1995). Fisheries biology, assessment and management. Oxford, Fishing News Books. Pp. 341.
LFDP (1997) Lake Management Plans. Lake Fisheries Development Project, Phase II: Working Paper 23. Ministry of Agriculture, Addis Ababa.
Lotze, H. K. (2004). Repetitive history of resource depletion and mismanagement: the need for a shift in perspective. Marine Ecology Progress Series 274: 282–285.
Makin, M., Kingham, J. J., Waddam, A. E., Birchal, C. J. and Tamene Tefera (1975) Development projects in the Southern Rift Valley of Ethiopia. Land Resources Study 21. Land Resources Division. Ministry of Overseas Development, England.
Mathewos Hailu, Getachew Senbete, Megersa Hindabu and Birhanu Tadese (2010). Anthropogenic impacts on rift valley water bodies: The case of Lake Ziway, Langano, and Abijata. In: Management of shallow water bodies for improved productivity and peoples' livelihoods in Ethiopia. (Seyoum Mengistu and Brook Lemma eds.) EFASA, Addis Ababa University Printing Press, Addis Ababa, pp. 210-216.
Ogutu-Ohwayo, R. and Balirwa, J. S. (2006). Management challenges of freshwater fisheries. Africa Lakes and Reservoirs: Research and Management 11: 215–226.
Pomeroy, R., Berkes, F. (1997) Two to tango: the role of government in fisheries co-management. Marine Policy; 21:465–80.
Schroder, R. (1984). An attempt to estimate the fish stock and the sustainable yield of Lake Ziway and Lake Abaya, Ethiopian Rift Valley. Arch. Hydrobiol. 3:411-441.