This chapter mainly presents the history of shrimp aquaculture in Bangladesh and impacts of shrimp farming on rural livelihoods with particular focus on income and dietary consumption, based on literature reviews and structured field surveys. The chapter also focuses on the complexities of land use patterns and recommends a holistic approach to adopt integrated zoning principles into national policies to sustain shrimp farming in Bangladesh.
The shrimp culture possibilities of Brazil are examined, describing the various projects undertaken and the various systems used for rearing the penaeids.
To satisfy increasing demands for fish as food, progress must occur towards greater aquaculture productivity whilst retaining the wild and farmed genetic resources that underpin global fish production. We review the main selection methods that have been developed for genetic improvement in aquaculture, and discuss their virtues and shortcomings. Examples of the application of mass, cohort, within family, and combined between-family and within-family selection are given.
Econometric techniques were used to estimate a production function for tilapia pond culture in El-Fayum Governorate, Egypt, utilizing cross-sectional field data. Explanatory variables were feed, initial stocking weight, and pond size. The function was used to examine returns to scale, estimate the productivity of feed and initial stocking weight, and estimate the profit maximizing demand equations for feed and fingerlings. Diminishing returns to scale seem to exist for tilapia pond culture.
India is endowed with a continental shelf of 0.5 million km2 and an exclusive economic zone (EEZ) of about 2 million km2. Almost half (39%) of the Indian population utilizes the marine fisheries resources. India ranked sixth worldwide in total fish production (4.95 million t) and second in inland fish production (2.24 million t) during 1995 - 96. Fish production expanded from 0.75 million t in 1950 - 51 to 4.95 million t in 1995 - 96, giving a significant increase at a cumulative growth rate of 4.2% per annum.
Fish production in Vietnam increased rapidly from 420 000 t in 1981 to 1 130 680 t in 1998. Likewise, there was an expansion in the number of motorized fishing boats from 29 584 units with an average horsepower (HP) of 19.8 boat-1 in 1981 to 71 800 units with an average HP of 26.2 in 1998. In 1995, fish production was valued at VN$2 475 billion (US$0.02 billion at 1 US$ = 11 041 VN$; source: oanda. com).
A brief account is given of the results of a grow-out trial conducted regarding the freshwater prawn (Macrobrachium rosenbergii ) in a farm pond in Ghana with water at temperatures of 30-33 C. Results showed that 70% of the prawns achieved lengths of over 13 cm and wet weight of > 35 g, figures which compare favourably with growth rates achieved in other parts of the world. Although M. rosenbergii culture is viable in Ghana, problems exist which prevent further development, the major one being lack of foreign exchange to purchase juveniles.
The Brackishwater Aquaculture Development and Training Project, a cooperative effort of the Government of the Philippines, represented by the Bureau of Fisheries and Aquatic Resources (BFAR) under the Ministry of Natural Resources (MNR), the United Nations Development Programme (UNDP), and the Food and Agriculture Organization of the United Nations (FAO), became operational in April 1977. The author was project leader, representing FAO/UNDP until the project was completed in early 1983.
The rural populations of southern Bangladesh are some of the most vulnerable communities in the world to the future impacts of climate change. They are particularly at risk from floods, waterlogged soils, and increasing salinity of both land and water. The objective of this project was to analyze the vulnerability of people in four villages that are experiencing different levels of soil salinity.
This chapter examines pangasius catfish aquaculture in Vietnam in the context of changing social relations of production, European consumer trends and regulation. In particular we are interested in how the rise of 'sociotechnical' environmental regulatory networks in the form of quality standards and third-party certififcation have altered power relations between consumers and producers across global space.