When working with length frequency date, we often need to compute the mean weights of the fish in the various classes. This article outlines one of the methods used.
This paper explores the seafood sector in Indonesia, using fish supply-demand modeling, with special focus on the growing role of aquaculture in the country's food portfolio. The paper describes six scenarios for future fish supply-demand dynamics and examines the role of aquaculture growth in fish supply in Indonesia.
Aquaculture has experienced spectacular growth in the past decades, during which continuous innovation has played a significant role, but it faces increasing criticism regarding its ecological and social sustainability practices and the resulting challenges for future innovation processes. However, in the aquaculture literature, there is limited systematic knowledge of how innovation has been approached in terms of how the focus and the scope of aquaculture innovation processes are understood and managed.
This paper aims to devise a farmer participatory method that not only improves farmer management of natural resources, but also monitors the impact of improvements. This assessment is made in terms of: economic efficiency, biological material recycling, species biodiversity and material input-output balance. Results suggest that high performance in all indicators can occur simultaneously and that economic loss from crop failure does not jeopardise performance in biodiversity and recycling.
This paper describes the efforts to establish a network of community-conserved areas in the municipality of San Mariano on Luzon, with the dual aim to protect the Philippine crocodile and to improve inland fisheries. The necessary steps to establish a community-conserved area are summarized, and their sustainability assessed.
During the 1930s, people in the Lake Chilwa Basin in Malawi had to cope with both the drying up of Lake Chilwa and the global economic depression. We chose to describe this confluence on Chisi Island as the ‘double crisis,’ and it may at first glance seem obvious, but on examination becomes quite complex. In the case of the Lake Chilwa, the colonial administration introduced cotton production on the dry lake bed to boost the economy of Nyasaland in the face of the economic depression. However, the people of Chisi Island successfully resisted cotton farming.
This primer aims to give decisionmakers in governmental and non-governmental organizations and in other organizations concerned with agriculture and rural development an overview and a basis for understanding the principles of IAA, and to help them decide whether to embark on IAA activities and include these in their program portfolio.The case of a rice-fish farmer in Cavite Philippines was described.
India is the world's second largest producer of farmed freshwater fish. The state of Andhra Pradesh (AP) is by far the most important producer of fish in India. Since the late 1970s, fish culture in AP has undergone a boom (first with Indian major carps, then pangasius), resulting in expansion of pond area to 142,000 ha, and massive increases in inland farmed fish production, to 1.5 million tons. Unregulated growth of carp farming has caused severe environmental conflicts, leading to the demolition of 39,000 ha of ponds by the state.
This research project seeks to: provide baseline information on the present status of the aquaculture sector from a human development perspective; identify the types and numbers of people employed by the sector; and explore the role of aquaculture in providing social and economic services at a global level, with a particular emphasis on small-scale stakeholders. The research findings presented here are based on a global synthesis of information from various sources and 9 country case studies in Asia, Africa and Latin America.
Aquaculture In developing countries can improve the sustainability of small-scale farms provided that It is fully integrated with other enterprises and household activities so as to allow farm families and communities to manage their natural resources effectively. This requires the consideration of pond management and fish husbandry as means to a variety of ends (water storage, soil conservation and fertility, integrated pest management, etc.), not just production of fish.