Strategic review of enhancements and culture-based fisheries

Lorenzen, K., Amarasinghe, U.S, Bartley, D.M, Bell, J.D, Bilio, M., de Silva, S.S, Garaway, C.J, Hartmann, W.D, Kapetsky, J.M, Laleye, P., Moreau, J., Sugunan, V.V and Swar, D.B 2000, Strategic review of enhancements and culture-based fisheries, in Technical Proceedings of the Conference on Aquaculture in the Third Millennium, Network of Aquaculture Centres in Asia-Pacific, Bangkok, Thailand, pp. 221-237.

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Title Strategic review of enhancements and culture-based fisheries
Author(s) Lorenzen, K.
Amarasinghe, U.S
Bartley, D.M
Bell, J.D
Bilio, M.
de Silva, S.S
Garaway, C.J
Hartmann, W.D
Kapetsky, J.M
Laleye, P.
Moreau, J.
Sugunan, V.V
Swar, D.B
Conference name Conference on Aquaculture in the Third Millennium (2000 : Bangkok, Thailand)
Conference location Bangkok, Thailand
Conference dates 20-25 Feb. 2000
Title of proceedings Technical Proceedings of the Conference on Aquaculture in the Third Millennium
Editor(s) Subasinghe, R.P.
Bueno, P.B.
Phillips, M.J.
Hough, C.
McGladdery, S.E.
Arthur, J.R.
Publication date 2000
Start page 221
End page 237
Publisher Network of Aquaculture Centres in Asia-Pacific
Place of publication Bangkok, Thailand
Keyword(s) Aquaculture
Culture-based Fisheries
Enhancement
Development
Floodplains
Reservoirs
Coastal Zone
Summary Enhancements are interventions in the life cycle of common-pool aquatic resources. Enhancement technologies include culture-based fisheries, habitat modifications, fertilization, feeding and elimination of predators/competitors. Enhancements are estimated to yield about two million mt per year, mostly from culture-based fisheries in fresh waters where they account for some 20 percent of capture, or 10 percent of combined capture and culture production. Marine enhancements are still at an experimental stage, but some have reached commercial production. Enhancements use limited external feed and energy inputs, and can provide very high returns for labour and capital input. Moreover, enhancement initiatives can facilitate institutional change and a more active management of aquatic resources, leading to increased productivity, conservation and wider social benefits. Enhancements may help to maintain population abundance, community structure and ecosystem functioning in the face of heavy exploitation and/or environmental degradation. Negative environmental impacts may arise from ecological and genetic interactions between enhanced and wild stocks. Many enhancements have not realised their full potential because of a failure to address specific institutional, technological, management and research requirements emanating from two key characteristics. Firstly, enhancement involves investment in common-pool resources and can only be sustained under institutional arrangements that allow regulation of use and a flow of benefits to those who bear the costs of enhancement. Secondly, interventions are limited to certain aspects of the life cycle of stocks, and outcomes are strongly dependent on natural conditions beyond management control. Hence, management must be adapted to local conditions to be effective, and certain conditions may preclude successful enhancement altogether. Governments have a major role to play in facilitating enhancement initiatives through the establishment of conducive institutional arrangements, appropriate research support, and the management of environmental and other impacts on and from enhancements.
ISBN 9747313553
Language eng
Field of Research 070401 Aquaculture
Socio Economic Objective 830199 Fisheries - Aquaculture not elsewhere classified
HERDC Research category E2 Full written paper - non-refereed / Abstract reviewed
Copyright notice ©2000, Network of Aquaculture Centres in Asia-Pacific
Persistent URL http://hdl.handle.net/10536/DRO/DU:30013692

Document type: Conference Paper
Collection: School of Ecology and Environment
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