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  • 03 SEAFDEC/AQD External Publications
  • Journal Articles, Conference Papers and Book Chapters by SEAFDEC Staff
  • Conference Proceedings
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  • Journal Articles, Conference Papers and Book Chapters by SEAFDEC Staff
  • Conference Proceedings
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Economics of milkfish culture in the Philippines

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日付
1990
著者
Agbayani, Renato F.
Page views
5,655
ASFA keyword
food fish ASFA
milkfish culture ASFA
economic analysis ASFA
AGROVOC keyword
Philippines AGROVOC
milkfish AGROVOC
Chanos chanos AGROVOC
Taxonomic term
Chanos chanos GBIF
Metadata
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This paper discusses the costs and returns of three phases in milkfish culture as practiced in the Philippines namely: nursery; stunting or retarding the growth of milkfish fingerlings; and modular culture system.

The economic indicators used are average rate of return or return on investment and payback period. The economic analysis was based on experiments undertaken at the Leganes Research Station of SEAFDEC Aquaculture Department and verified in three sites located in the provinces of Negros Occidental (2 sites) and Cebu (1 site).
URI
http://hdl.handle.net/10862/323
Suggested Citation
Agbayani, R.F. (1990). Economics of milkfish culture in the Philippines. In: Tanaka, H., Uwate, K.R., Juario, J.V., Lee, C.S., Foscarini, R. (eds.). Proceedings of the Regional Workshop on Milkfish Culture Development in the South Pacific, 21-25 November 1988, Tarawa, Kiribati (pp. 101-108). Suva, Fiji: Food and Agriculture Organization of the United Nations, South Pacific Aquaculture Development Project.
Type
Conference paper
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  • Conference Proceedings [300]

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    Ration reduction, integrated multitrophic aquaculture (milkfish-seaweed-sea cucumber) and value-added products to improve incomes and reduce the ecological footprint of milkfish culture in the Philippines 

    de Jesus-Ayson, Evelyn Grace T.; Borski, Russel J. (AquaFish Collaborative Research Support Program, Oregon State University, 2012)
    In the Philippines, cage culture of milkfish in marine environments is increasing. The practice uses high stocking densities, with significantly greater inputs of artificial feeds which more often than not, have led to excessive feeding and consequently excessive nutrient loading in receiving waters, exacerbating problems with pollution. These could have contributed to occurrence of periodic fish kills in areas of marine milkfish culture clusters. In marine cage culture, about 80% of variable expenses are attributable to feed costs. Experiments were conducted to compare production characteristics of milkfish fed on alternate days versus those raised on daily feeding in marine cage culture. Fish were fed either daily or every other day using a reduced feed ration at 7.5% of fish biomass at the start of culture down to 3% of fish biomass towards harvest. We showed this ration level was as effective as the industry standard that begins at a rate of 10% average body weight. Morevover, we had previously found that milkfish reared in brackishwater ponds on an alternate day feeding scheme using the reduced ration level produced a 56% cost savings in feed with little impact on total yield relative to fish raised on a daily feeding protocol. In the present study, survival rates (~ 90%) were comparable between the control fish fed daily and groups fed on alternate days in marine cages. Similarly, total harvested biomass of fish in the alternate day and daily feeding groups was similar as was the harvest value, although fish on the alternate day feeding scheme grew slightly less. The amount of feed and the corresponding cost of feeds consumed were significantly lower in stocks that were fed on alternate days compared with those fed daily (P < 0.05). Feed conversion ratio (FCR) was lower in the alternate-day fed group (FCR = 2.46) relative to stocks fed daily (FCR = 3.59). Overall, the results demonstrate that feed costs can be reduced by around 32% in stocks fed on alternate days, which yields an estimated 20-25% improvement in production efficiency relative to raising animals on a daily feeding protocol. Hence, a significant costs savings with reduced impact of nutrient loading in the environment is likely to be realized for farmers who adopt an alternate day feeding scheme in raising milkfish in marine cages.

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