Deakin University
Browse
desilva-strategicreview-2000.pdf (323.29 kB)

Strategic review of enhancements and culture-based fisheries

Download (323.29 kB)
conference contribution
posted on 2000-01-01, 00:00 authored by K Lorenzen, U Amarasinghe, D Bartley, J Bell, M Bilio, S de Silva, C Garaway, W Hartmann, J Kapetsky, P Laleye, J Moreau, V Sugunan, D Swar
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.

History

Event

Conference on Aquaculture in the Third Millennium (2000 : Bangkok, Thailand)

Pagination

221 - 237

Publisher

Network of Aquaculture Centres in Asia-Pacific

Location

Bangkok, Thailand

Place of publication

Bangkok, Thailand

Start date

2000-02-20

End date

2000-02-25

ISBN-10

9747313553

Language

eng

Publication classification

E2 Full written paper - non-refereed / Abstract reviewed

Copyright notice

2000, Network of Aquaculture Centres in Asia-Pacific

Editor/Contributor(s)

R Subasinghe, P Bueno, M Phillips, C Hough, S McGladdery, J Arthur

Title of proceedings

Technical Proceedings of the Conference on Aquaculture in the Third Millennium

Usage metrics

    Research Publications

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC