In this review, the author provides an overview of the small water bodies as an important inland fishery resource and analyses the global trends in their utilization. He also assesses the opportunities for enhancing fish production from these water bodies based on the strengths and weaknesses of the different management options.
The catch-effort relationship of the River Nile is Complicated by such factors as changes in water level and hydrology as well as spawning movements of the fish, which result in uneven distribution of the fish and fishing. The effects ofdam construction on the ecology of the fish fauna are considered, with particular reference to the effects of the Faraskour dam on the river fishery.
In this paper, we assess how resettlement and changes in water access have altered livelihoods of local communities upstream of the Theun Hinboun Expansion Project in Lao PDR. Based on household surveys conducted both before and after resettlement, we estimate changes in water use and benefits among households of 4 resettled villages.
Since early 2007 there has been a repid acceleration in hydropower development in the Mekong Basin. The consequence of this development on fisheries in the area has been downnplayed. Aim of this chapter Discussion reverts to a 'conventional wisdom' that the captured fisheries are doomed. Fisheries are being downplayed. The aim of this chapter is to place this 'conventional wisdom' of doom under closer critical scrutiny.
We compared the effects of water resource development on migratory fish in two North American rivers using a descriptive approach based on four highlevel indicators: (1) trends in abundance of Pacific salmon, (2) reliance on artificial production to maintain fisheries, (3) proportion of adult salmon that are wild- versus hatchery-origin, and (4) number of salmon populations needing federal protection to avoid extinction.
Twelve hydropower schemes have been proposed for the Lao, Lao-Thai and Cambodian reaches of the Mekong mainstream. Implementation of any or all of the proposed mainstream projects in the Lower Mekong Basin (LMB) could have profound and wide-ranging socio-economic and environmental impacts in all four riparian countries.
In the absence of reliable data on the species composition of the catch in the Lower Mekong Basin, the authors look at three approaches to estimate the size of the region’s migratory fish resources.The article, based on three different studies, concludes that 700,000 tonnes to 1.6 million tonnes of migratory fish are at risk. These possible losses correspond to respectively five times the size of the fishery sector in Finland and the whole fishery sector in Denmark.
Fishpen culture is a possible means to increase fish production in Casamance, Senegal and to develop aquaculture without negative environmental effects. To study this possibility, a fishpen study was conducted in two dammed valleys, Guidir and Balobar in the area. Wild Sarotherodon melanotheron from 7.7 to 25.4 g and Tilapia guineensis from 7.7 to 35.0 g were stocked at densities ranging from 1.5 to 2.5 individuals/ super(m). Results are summarized in this article.
The Basin Focal Project for the Volta (BFP-Volta) is a research project funded by the Challenge Programme on Water and Food (CPWF). Its aim is to provide an in-depth analysis of the basin through three main thematic issues: water-poverty, water availability/use and water productivity. The overall objective of the BFP-Volta is to contribute to the main goal of the CPWF, that is, to alleviate poverty through better management of water in order to enhance agricultural productivity and environment conservation.
This paper draws on approaches in ecology, biology and policy analysis to examine the tensions between dams and fisheries in the Lower Mekong Basin. We review the exceptional importance of Mekong fisheries in terms of total catch, economic value and their role in rural livelihoods. The ecological conditions necessary to sustain the fish production are also analysed. The paper then considers the implications of dam development in the Mekong Basin, drawing on recent research to review predicted changes in hydrology and the resulting impacts on fishery resources.