Genetic improvement through selective breeding has been used for millennia on crops and livestock, but up until the 1980s, little had been done to utilize this process for farmed fish. In response to the inadequate supply of tilapia seed and the deteriorating performance of the fish in many aquaculture systems in Asia, WorldFish and partners began the Genetic Improvement of Farmed Tilapia (GIFT) project to develop a faster-growing strain of Nile tilapia (Oreochromis niloticus) that was suitable for both small-scale and commercial aquaculture.
Rice field fisheries refer to the capture of wild fish and other aquatic animals from flooded rice field agroecosystems and their supporting infrastructure, such as canals, channels, streams and other bodies of water. Central to maintaining fish productivity in rice fields is a designated conservation area known as a community fish refuge (CFR) that connects to rice fields to form an area known as the zone of influence.
Leadership is heralded as being critical to addressing the “crisis of governance” facing the Earth's natural systems. While political, economic, and corporate discourses of leadership have been widely and critically interrogated, narratives of environmental leadership remain relatively neglected in the academic literature. The aims of this paper are twofold. First, to highlight the centrality and importance of environmental science's construction and mobilization of leadership discourse.
The annual production from global aquaculture has increased rapidly from 2.6 million tons or 3.9% of the total supply of fish, shellfish and mollusks in 1970, to 66.7 million tons or 42.2% in 2012, while capture fisheries have more or less leveled out at about 90 million tons per year since the turn of the century. Consequently, the future seafood supply is likely to depend on a further increase of aquaculture production. Unlike terrestrial animal farming, less than 10% of the aquaculture production comes from domesticated and selectively bred farm stocks.
This book explores how natural resource management initiatives in more than twenty countries and territories have supported livelihoods and facilitated post-conflict peacebuilding.
The CGIAR Research Program on Aquatic Agricultural Systems (AAS) seeks to reduce poverty and improve food security for many small-scale fishers and farmers who are dependent on aquatic agriculture systems by partnering with local, national and international partners to achieve large-scale development impact. This study on promising practices in food security and nutrition assistance to vulnerable households in the Tonle Sap region forms part of the preliminary research that informs AAS work in the highly productive Mekong Delta and Tonle Sap Lake floodplain.
Millions of people around the world depend on shrimp aquaculture for their livelihoods. Yet, the phenomenal growth of shrimp farming has often given rise to considerable environmental and social damage. This article examines the impacts of commercial, export-oriented shrimp aquaculture on local livelihood vulnerability by comparing the exposure, sensitivity, and adaptive capacity of shrimp farm employees with non-farm employees in rural Mozambique.
Different kinds of defects are observed on farmed fish, and while a lot of research has concentrated on skeletal abnormalities, little is known on scale anomalies. In this paper, a survey for lateral line shape anomalies and disoriented scale patterns was carried out in a common garden experiment involving crosses of 5 different wild populations of European seabass, in order to find if any correlation exists between lateral line shape anomalies, disoriented scale patterns and genetic origin.
Orange sweet potato roots and leaves are rich in vitamins and energy. They are valuable source of micronutrients particularly vitamins A, B and C. Combining orange sweet potato with other foods such as nutrient-rich small fish increases dietary diversity and improves the nutritional value of family meals. This leaflet outlines the methods used in growing orange sweet potato in Bangladesh, where 56% of the population do not meet their vitamin A requirements through their diet.
Batu ba ba pilela fa lika ze fumanwa mwa Libala la Bulozi, ba ba fumana sico ni buiketo bwa mubili ni moya, ba akalezwa ku fita fa palo ya bo lule ba mashumi a ketalizoho ka amabeli (70 000). Kono ki zamaiso ye maswe, ku yamba kwa swalelele ni ku itusisa lisebeliso za businyi ze fukulize litapi ka bubebe bo bu komokisa , mwa nako ye kuswani.