Related items
Showing items related by metadata.
-
Book (series)Management, co-management or no management? Major dilemmas in southern African freshwater fisheries. Part 2: Case studies. 2003
Also available in:
No results found.This report contains ten case studies which serve as background for a synthesis report published in FAO Fisheries Technical Paper 426/1. They have been conducted in five medium sized lakes in the Democratic Republic of Congo, Malawi, Zambia and Zimbabwe. Five of the case studies focus on biological and environmental effects while the remaining five are concerned with historical and sociological analysis. In different ways all the case studies focus on some of the following three featur es, relevant for the management of freshwater fisheries in the South Africa Development Community (SADC) region: – How has fishing effort developed in these lakes over the last 50 years? Despite a considerable increase in the total fishing effort in the region, the report demonstrates great variation in effort dynamics both in time and place. Most papers distinguish between changes related to the number of people and changes in technology and investment patterns and show that most of the increases in effort have been population-driven. Only in the case of Lake Malombe have changes in effort mainly been investment-driven. – What causes the changes in fishing effort? -
Book (stand-alone)Kapenta rig survey of the Zambian waters of Lake Kariba 2014
Also available in:
No results found.This survey revealed the huge extent of overfishing of kapenta that is occurring on the Zambian side of Lake Kariba and the rate at which this problem is expanding. It can be confidently reported that there are at least 950 boats but more likely over 1000 on the Zambian side of Lake Kariba. This is four times the number of vessels estimated to keep fishing at the original maximum sustainable yield. Rapid action is required to prevent further collapse of the kapenta fishing industry and it is the refore important to highlight the lack of enforcement and the lack of resources within Local Government and DOF to police these waters. This lack of enforcement is identified to be one of the leading problems. The DOF do not appear to have any record of the number of rigs registered legally on the lake. -
Book (series)Consequences of biomanipulation for fish and fisheries 2001
Also available in:
No results found.The main goal of biomanipulation by fish reduction is not a change in the fish community but a change in the aquatic ecosystem. Fish reduction is a method to push the system in another state, usually a shift from algae domination to macrophyte domination. Intensive fish removal is done by one of the following methods: seining (the Netherlands, Germany, UK), trawling (Sweden, Finland), use of rotenone (Norway, USA, Poland) and stocking of piscivorous fish (USA, Germany). If circumstances allow it (reservoir, ponds) draining is combined with seining (the Netherlands, UK, Poland). The intensity and duration of fishing differs per case, but is quite important for the way the system changes. Fishing may be combined with stocking of predatory fish, mainly pike and pikeperch (or walleye)......
Users also downloaded
Showing related downloaded files
No results found.