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Use of geographical information systems as a tool for predicting fish yield in tropical reservoirs : case study on Sri Lankan reservoirs

De Silva, Sena, Amarasinghe, U., Nissanka, C., Wijesooriya, W. and Fernando, M. J. J. 2001, Use of geographical information systems as a tool for predicting fish yield in tropical reservoirs : case study on Sri Lankan reservoirs, Fisheries management and ecology, vol. 8, pp. 47-60, doi: 10.1046/j.1365-2400.2001.00221.x.

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Title Use of geographical information systems as a tool for predicting fish yield in tropical reservoirs : case study on Sri Lankan reservoirs
Author(s) De Silva, Sena
Amarasinghe, U.
Nissanka, C.
Wijesooriya, W.
Fernando, M. J. J.
Journal name Fisheries management and ecology
Volume number 8
Start page 47
End page 60
Publisher Blackwell Science Ltd
Place of publication Oxford, England
Publication date 2001-12
ISSN 0969-997X
1365-2400
Keyword(s) fish yield
GIS
land-use types
limnological features
reservoirs
yield prediction
Summary Use of geographical information systems (GIS) in inland fisheries has hitherto been essentially restricted to site evaluation for aquaculture development and assessment of limnological changes in time and space in individual water bodies. The present GIS study was conducted on the land-use pattern of the catchments of nine reservoirs in Sri Lanka, for which detailed fishery data, viz. yield, fishing intensity, landing size of major constituent species, together with selected limnological data such as conductivity and chlorophyll-a, were available. Potential statistical relationships (linear, curvilinear, exponential and second-order polynomial) of fish yield (FY, in kg ha−1 yr−1) to different land-use patterns, such as forest cover (FC, in km2) and shrub-land (SL, in km2), either singly, or in combination, and/or the ratio of each land type to reservoir area (RA in km2) and reservoir capacity (RC in km3), were explored. Highly significant relationships were evident between FY to the ratio of SL and/or FC+SL to RA and/or RC. Similarly, the above land-use types to RA and RC ratios were significantly related to limnological features of the reservoirs. The relationships of FY to various parameters obtained in this study were much better correlated than those relationships of FY to limnological and biological parameters used in yield prediction in tropical and temperate lacustrine waters previously.
Language eng
DOI 10.1046/j.1365-2400.2001.00221.x
Field of Research 070401 Aquaculture
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2001, Blackwell Science Ltd
Persistent URL http://hdl.handle.net/10536/DRO/DU:30001344

Document type: Journal Article
Collections: School of Ecology and Environment
Higher Education Research Group
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