Water quality variables were monitored during 3.5 years of research on pig-fish, duck-fish and chicken-fish systems. Early morning dissolved oxygen levels were often below 0.5 mg/1. Total ammonia levels were highest in chicken-fish systems with maximum levels exceeding 6 mg1. Water quality sampling designs which measure the fluctuations in water quality variables are discussed. Species selection, control of manure loads, addition of new water, and aeration are presented as means to manage water quality in livestock-fish systems.
This report presents the findings of a mission to critically review the institutional, policy and regulatory framework for sustainable development of the Egyptian aquaculture sector. The study was undertaken by an International Expert on Aquaculture Policy, and a National Expert on Institutions, on behalf of the Project “Improving Employment and Income through the Development of Egypt’s Aquaculture Sector“, implemented by WorldFish and CARE, and funded by the Swiss Agency for Development and Cooperation(SDC).
In the developing world, more than 1 billion people depend on fish for most of their animal protein, and another 1 billion people depend on livestock. Poor people, especially women and children, typically eat very little meat, milk and fish. This contributes to nutrient deficiencies and poor physical and cognitive development for children and poor health and livelihood outcomes for adults.
The Egyptian aquaculture industry provides more than 100,000 full-time or part-time jobs and produces the country’s least-expensive farmed animal protein. Thus, aquaculture plays an important role in both sustaining livelihoods and improving the diet quality and nutritional health of Egyptians, including a significant proportion of the 25.5% who are resource-poor. Recognizing this dual role, WorldFish has promoted sustainable growth in Egyptian aquaculture for more than 20 years.
Animal source food production globally already faces increasing pressure because of negative environmental implications, particularly because of greenhouse gas emissions. As livestock and aquaculture are important sources of livelihood, it is necessary to find suitable solutions to convert these industries into economically viable enterprises, while reducing the ill effects of global warming. The most evident and important effects of climate change on livestock production will be mediated through changes in feed resources.
This publication is based on materials covered and outputs generated during the Workshop on Risk Assessment Methodologies and Tools for Aquaculture in Sub-Saharan Africa, which was jointly held by WorldFish and FAO in Siavonga, Zambia on 28 June - 2 July 2010. The workshop was delivered as a training exercise to 17 participants from seven sub-Saharan countries and was designed to highlight current methodologies and tools available for environmental risk analysis in aquaculture development.
Rapidly transforming Asian food systems are oriented largely towards domestic markets, yet literature on Asian crop booms deals almost exclusively with commodities produced for export. With reference to pangasius aquaculture in Bangladesh, we argue that ‘domestic crop booms’ - agricultural booms driven by domestic demand - are contributing to rapid social and ecological transformations in Asia and across the globe. We adopt a comparative multi-scalar approach, and develop the concept of ‘livelihood pathways’ as a means of understanding agrarian change associated with crop booms.
Egypt’s aquaculture sector provides full-time employment for more than 140,000 people and is a critical source of fish that provides Egyptians with up to 38% of their animal protein intake.
Despite being valued at US$ 1.5 billion, the sector faces various challenges. Poor and variable water quality, as well as restrictions on water and land use, limit the growth of aquaculture. Rising feed costs and the increased poverty levels of consumers mean fish farmers are feeling the pressure of higher production costs and lack of price flexibility.
Exposed to the intense Egyptian sun, a woman sits by the side of a dirt road selling freshly harvested tilapia from a local fish farm. Tired after rising at dawn to buy her produce, she is approached by a man who demands that she pay him a fee for her roadside stall or he’ll force her to sell elsewhere. She protests, but with no work license or union support there is little she can do. Their exchange escalates and the man upturns her icebox in anger, spilling her fish across the road.