Your search found 15 records
(Location: IWMI-HQ Call no: 639.22 G570 DES Record No: H038805)
(Location: IWMI HQ Call no: IWMI 639.3 G000 KAM Record No: H040770)
3 Wijeyaratne, M. J. S.; Amarasinghe, U. S. (Eds.) 2008. Participatory approaches to reservoir fisheries management: issues, challenges and policies. Proceedings of the international symposium held on 03-06 October 2004 in Dambulla, Sri Lanka, organized by German Technical Cooperation (GTZ) and Sri Lanka Association for Fisheries and Aquatic Resources, Colombo, Sri Lanka. Colombo, Sri Lanka: Sri Lanka Association for Fisheries and Aquatic Resources. 235p.
(Location: IWMI-HQ Call no: 639.21 G000 WIJ Record No: H041321)
(Location: IWMI HQ Call no: e-copy only Record No: H046492)
(0.19 MB)
India’s 2.25 million ha of village tanks were for centuries loosely managed as multiple use common property resources, including for fishing by artisanal fisher-folk, the lowest in the social hierarchy. During the 1970s and after, the aquaculture productivity revolution created a vibrant new political economy by increasing manyfold the value of fishing rights in these tanks. This productivity boom was expected to improve the lot of poor artisanal fisher communities. But has this happened? This study across the Indo-Gangetic Basin suggests increasing elite capture of these community-owned resources. Capital, technology and muscle power have determined who benefits; artisanal fishers have none of these.
(Location: IWMI HQ Call no: e-copy only Record No: H046713)
(1.08 MB)
(Location: IWMI HQ Call no: e-copy only Record No: H046723)
(0.99 MB)
Present study recommends an option to overcome the limited water availability in surface irrigation system through provision of secondary reservoirs in the command. The harvested water can be utilized for irrigation in the dry season, short duration fish culture, etc. Approximately 10% of the command area is required for the secondary reservoir with assumption of 50% capacity of the main reservoir will be available for irrigating dry season crops. The demonstration of use of water from the secondary reservoir in addition to the water from main reservoir has resulted in substantial crop and fish yield. The gross and net returns from various cropping patterns considered using irrigation water from main reservoir (MR) and from main and secondary reservoir (MR+SR). Among the cropping patterns considered, rice-tomato cropping pattern resulted in highest net return of INR 29,457/ha followed by rice-brinjal cropping pattern (INR 22,430/ha) with benefit cost ratio of 2.07 and 1.79, respectively. Highest benefit-cost ratio of 2.09 was obtained for rice-sunflower cropping system due to relatively lower cost of cultivation of sunflower. The highest incremental value of net returns of 3710 `/ha was obtained with rice-tomato cropping system. The low input-based scientific fish culture in the secondary reservoir has enhanced the fish yield by three fold over traditional practice increasing the gross return from the system. The economic analysis also revealed that the intervention is economically viable.
(Location: IWMI HQ Call no: e-copy only Record No: H047452)
(2.58 MB)
8 Hosen, Y. 2016. Development of agricultural technologies in the Mekong Delta to respond to climate change. Ibaraki, Japan: Japan International Research Center for Agricultural Sciences. 105p. (JIRCAS Working Report 84)
(Location: IWMI HQ Call no: 630 G784 HOS Record No: H047936)
9 Drechsel, Pay; Skillicorn, P.; Buijs, J.; Hanjra, Munir A. 2018. Wastewater for the production of fish feed (Bangladesh) - Case Study. In Otoo, Miriam; Drechsel, Pay (Eds.). Resource recovery from waste: business models for energy, nutrient and water reuse in low- and middle-income countries. Oxon, UK: Routledge - Earthscan. pp.606-616.
(Location: IWMI HQ Call no: IWMI Record No: H048681)
(1.03 MB)
10 Amoah, Philip; Muspratt, A.; Drechsel, Pay; Otoo, Miriam. 2018. A public-private partnership linking wastewater treatment and aquaculture (Ghana) - Case Study. In Otoo, Miriam; Drechsel, Pay (Eds.). Resource recovery from waste: business models for energy, nutrient and water reuse in low- and middle-income countries. Oxon, UK: Routledge - Earthscan. pp.617-630.
(Location: IWMI HQ Call no: IWMI Record No: H048682)
(1.42 MB)
(Location: IWMI HQ Call no: e-copy only Record No: H049739)
(103 MB)
(Location: IWMI HQ Call no: e-copy only Record No: H050021)
(12.70 MB) (12.7 MB)
13 Sey, S. E.; Agbo, N. W.; Edziyie, R.; Amoah, Philip; Yeboah-Agyepong, M.; Nsiah-Gyambibi, R.; Abbas, S. 2021. Consumer preference, growth and profitability of African catfish (Clarias gariepinus) grown in treated and aerated wastewater fed ponds in Kumasi, Ghana. Heliyon, 7(3):E06424. [doi: https://doi.org/10.1016/j.heliyon.2021.e06424]
(Location: IWMI HQ Call no: e-copy only Record No: H050313)
(1.92 MB) (1.92 MB)
Recycling of wastewater provides a substantial solution to the global issue of water scarcity and high water use in aquaculture. However, this sustainable way of wastewater use has not been given much attention and exploration. This study focused on the consumer preference for fish grown in treated wastewater as well as the effect of aeration on the growth performance and economic benefit of African catfish (Clarias gariepinus) grown in treated wastewater. Two hundred (200) respondents from two communities (Chirapatre and Gyinyase) near the wastewater treatment plant in Kumasi were interviewed to determine their willingness to accept and pay for African catfish grown in treated wastewater. For the growth trial, a total of 600 fish (of average initial weight 39.12g) were stocked in two maturation ponds with 4 h (3:00am–7:00am) of aeration daily. The trial lasted for 12 weeks and variables monitored included the survival, growth performance (weight gain, specific growth rate, and yield) and water quality. Fish cultured in non-aerated wastewater ponds (NWFPs) under similar conditions as in aerated wastewater-fed ponds (AWFPs) served as control. The results indicated most important considerations for consumers in their choice of fish to consume were in order of importance; food safety, freshness of fish, taste and packaging. The proximity of consumers to the treatment plant, the price of fish, religion, and age and whether or not they were fish consumers affected their willingness to pay for African catfish grown in the treated wastewater significantly. For the growth trial, dissolved oxygen concentrations in the aerated ponds were significantly higher than in the NWFPs and this led to more than a doubling of the growth rates in the African catfish grown in the AWFPs (189.10g 11.32) as compared to the NWFPs (90.70g 11.59). The pond aeration improved fish growth significantly (p < 0.0098). On economic benefit, the aerated system yielded profits of 618.83 (€103.13) as compared to a loss of 104.99 (€17.50), which was incurred in the non-aerated ponds. Education of the consumers on the process of wastewater treatment and establishment of food safety guidelines will therefore be recommended to increase consumer interest in consuming fish from the treated wastewater.
14 Amoah, Philip; Drechsel, Pay. 2023. Water quality and aquaculture. In Drechsel, Pay; Marjani Zadeh, S.; Salcedo, F. P. (Eds.). Water quality in agriculture: risks and risk mitigation. Rome, Italy: FAO; Colombo, Sri Lanka: International Water Management Institute (IWMI). pp.77-92.
(Location: IWMI HQ Call no: e-copy only Record No: H052243)
(3.21 MB)
(Location: IWMI HQ Call no: e-copy only Record No: H053000)
(761 KB)
This report outlines policies and recommended policy engagements to promote agroecology practices in food production systems in the Lao People’s Democratic Republic (Lao PDR). Literature reviews and field consultation visits were used to collect data on factors and challenges influencing the integrated rice-fish farming practices by farmer households and policy engagements to enhance their local potential and address challenges that may prevent further expansion and sustainable practices.
The study found ‘good progress’ in terms of policy and institutional framework, facilitating a gradual transition from conventional farming practice to agroecology into food production systems, although there are some implementation gaps. To facilitate the transition toward improved agricultural practices, the following policy engagements are recommended:
Conduct regular recognition programs and knowledge dissemination events such as farmer-to-farmer peer learning support households in influencing uptake or scaling and farmer-led hatchery learning.
Use evidence-based costs and benefits of the rice-fish farmer field trials in policy research.
Conduct policy research to identify factors enabling integrated fish production in rice fields during dry seasons when many households experience lower production. Some incentives were outlined in the National Policy on the Promotion of Livestock and Aquatic Animal Production.
Continuing to involve policymakers from sectors in the CGIAR Agroecology Initiative to maintain policy support for agroecological farming practices in the community and further expansions across the country.
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