http://hdl.handle.net/1957/32180 2013-05-20T03:30:46Z 2013-05-20T03:30:46Z Chenyambuga, Sebastian Wilson Madalla, Nazael Mnembuka, Berno http://hdl.handle.net/1957/37878 2013-03-25T22:30:24Z 2012-01-01T00:00:00Z

Management and Value Chain of Nile Tilapia Cultured in Ponds of Small-scale Farmers in Morogoro Region, Tanzania Chenyambuga, Sebastian Wilson; Madalla, Nazael; Mnembuka, Berno A study was carried out to assess production performance and value chain of Nile tilapia grown in ponds of small-scale farmers in Morogoro region, Tanzania. Information was collected through individual interviews of 30 fish farmers. The main reasons for culturing fish were provision of animal protein food for home consumption (66.7%) and generation of income (23.3%). Fish farming contributed 10.6% of household annual income and was ranked second to crop production (50%). The majority of the farmers were fertilizing their ponds with chicken manure (30.0%) and cattle manure (23.3%). Most farmers (73.3%) cultured pure stand of Nile tilapia and only few (26.7%) practiced polyculture of Nile tilapia and African catfish. All farmers depended on natural food as a source of feed for their fish. Moreover, the farmers were feeding maize bran (96.7%), vegetables (66.7%), and kitchen leftovers (13.3%) as supplementary feeds. Men were responsible for purchasing and stocking fingerlings (60.0%), feeding (40.0%), pond maintenance (53.3%), harvesting (60.0%) and selling (43.3%). Women were mainly involved in fish processing (76.7%). The average period from stocking to harvesting was 5.75 ± 0.18 months for Nile tilapia and the mean yield was 6,946.2 kg/ha per year. About 22.2% of the harvested fish were consumed at home and the remaining (77.8%) were sold. The main actors in the value chain of cultured Nile Tilapia were fingerling producers, fish farmers and consumers. Most farmers sold fresh fish directly to neighbours (70.0%) and consumers in the local market within the village (30.0%). It is concluded that small-scale fish farming is important for provision of animal protein food and income and is done mostly by men, and it is characterized by low productivity due to improper pond fertilization and feeding. The major problems to Nile tilapia farming under small-scale fish farming is lack of funds, stunted growth of stocked fish, inadequate knowledge on fish farming and unavailability of concentrate feeds. This is part of the IIFET Special Session on Markets and Value Chains for Small Aquaculture & Fisheries Enterprises with a Focus on Gender that took place on 17 July 2012 in Dar Es Salaam, Tanzania in conjunction with 16th IIFET Conference. The complete proceedings of this special session are available (http://aquafishcrsp.oregonstate.edu/Documents/Uploads/FileManager/IIFET%202012%20CRSP%20Session%20Proceedings%20Final_small.pdf) through the Aquaculture & Fisheries Collaborative Research Support Program gender web site, (http://aquafishcrsp.oregonstate.edu/Gender/).

2012-01-01T00:00:00Z De Silva, Devarahandhi Bjorndal, Trond http://hdl.handle.net/1957/37116 2013-02-23T00:07:15Z 2012-01-01T00:00:00Z

Open Innovation in Fish and Seafood Processing: External Insights to Boost Internal R&D Efforts De Silva, Devarahandhi; Bjorndal, Trond This research is focused on the fish and seafood export industry of Sri Lanka, considering its importance to the country's economy. The objectives of the study are to investigate the nature of open innovation practices among fish and seafood exporters in Sri Lanka and to find out the role of open innovation on product and process development, market identification, market expansion, brand image, quality control, labelling and certification, sales promotion and advertising, and the sustainability of the resource base. The empirical study is based on the data obtained from 26 EU approved fish and seafood processing establishments. A structured questionnaire followed by interviews with CEOs, R&D heads and quality controllers were the principal data collection tools. Hansen and Birkinshaw's capability measure is used to measure the firm's level on idea generation, conversion and diffusion. Processing firms were divided into three groups; idea-rich/poor, conversion rich/poor and diffusion rich/poor. Hypothesis testing proved the positive relationship between firm performance and open innovation practices of the firms. Results reveal that firms are idea rich, conversion and diffusion moderate. Moreover, the study has identified open innovation partners, the nature of their support and the open innovation process of the fish and seafood export processors.

2012-01-01T00:00:00Z Groves, Theodore Knapp, Gunnar Ledyard, John Murphy, James Schmidt, Jörn http://hdl.handle.net/1957/37115 2013-02-23T00:06:23Z 2012-01-01T00:00:00Z

Report on IIFET Special Session “Fisheries Games and Experiments: Applications for Education, Outreach and Science” Groves, Theodore; Knapp, Gunnar; Ledyard, John; Murphy, James; Schmidt, Jörn There is growing realization of the potential for games and experiments as powerful tools not only for research, but also for education and outreach. Experiments are particularly powerful and useful for fisheries economists because (a) they can vividly illustrate some fundamental concepts and (b) are effective at testing the relative merits of various fishery management proposals. Fisheries economists have developed a wide variety of games and experiments for a wide variety of applications. However, many fisheries economists are unfamiliar with games and experiments and their potential applications. This two-part special session has a pair of complementary objectives: (a) to demonstrate a range of games and experiments to IIFET members who are unfamiliar with these methods so they can understand their potential for education, outreach and research; and (b) to provide an opportunity for existing developers and users of games and experiments to share new ideas for applications in fisheries.

2012-01-01T00:00:00Z Nguyen, Viet Thanh http://hdl.handle.net/1957/37114 2013-02-22T23:41:57Z 2012-01-01T00:00:00Z

Bio-economic Model of Eastern Baltic Cod Under the Influence of Nutrient Enrichment Nguyen, Viet Thanh The objective of this paper is to study the economic management of Eastern Baltic cod (Gadusmorhua) under the influence of nutrient enrichment. Average nitrogen concentration in the spawning areas during the spawning season of cod stock is chosen to be an indicator of nutrient enrichment. The optimal cod stock is defined using a dynamic bio-economic model for the cod fisheries. The results show that the current stock level is about half of the estimated optimal stock level and that the current Total Allowable Catch (TAC) is about onefourth of the optimal equilibrium yield. The results also indicate that the benefit from a reduction in nitrogen very much depends on the harvest policies. If the TAC is set equal to the optimal equilibrium yield, the benefit of a nitrogen reduction from the 2009 level to the optimal nitrogen level would be about604 million DKK over a 10-year time horizon, given a discount rate of 4% per year. However, if a recovery management plan is chosen, the benefit would only be about 49 million DKK over a 10-year time horizon. The full paper is published in Natural Resource Modeling: DOI: 10.1111/j.1939-7445.2012.00137.x

2012-01-01T00:00:00Z