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Trophic classification of non-perennial reservoirs utilized for the development of culture-based fisheries, Sri Lanka

Jayasinghe, U., Amarasinghe, Upali S. and De Silva, Sena 2005, Trophic classification of non-perennial reservoirs utilized for the development of culture-based fisheries, Sri Lanka, International review of hydrobiology, vol. 90, no. 2, pp. 209-222, doi: 10.1002/iroh.200410753.

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Title Trophic classification of non-perennial reservoirs utilized for the development of culture-based fisheries, Sri Lanka
Author(s) Jayasinghe, U.
Amarasinghe, Upali S.
De Silva, SenaORCID iD for De Silva, Sena orcid.org/0000-0001-9381-2136
Journal name International review of hydrobiology
Volume number 90
Issue number 2
Start page 209
End page 222
Publisher Wiley - VCH Verlag GmbH & Co. KGaA
Place of publication Berlin , Germany
Publication date 2005
ISSN 1434-2944
Keyword(s) Carlson's TSI
chlorophyll a
culture-based fisheries
non-perennial reservoirs
tropical reservoirs
Summary The aim of this study was to check the suitability of some trophic models developed for temperate regions to classify the non-perennial reservoirs of Sri Lanka in order to manage culture-based fisheries of those reservoirs. A limnological study was carried out in 45 non-perennial reservoirs, which have been randomly selected for stocking of fish fingerlings for the development of culture-based fisheries. High total phosphorous (TP) content in relation to algal biomass indicates high non-algal turbidity in all reservoirs. Carlson's trophic state indices (TSI) measured on the basis of Secchi disc depth [TSI (SDD)], TP [TSI (TP)] and chlorophyll a [TSI (Chl-a)] show that the 45 reservoirs studied are characterized by TSI (TP) = TSI (SDD) > TSI (Chl-a), indicating that non-algal particulate matter or colour dominates underwater light attenuation. As TSI (Chl-a) is positively correlated to culture-based fisheries yield, it is useful for planning culture-based fisheries development strategies in non-perennial reservoirs of Sri Lanka, and has the potential to be used elsewhere in the tropics for comparable developments.
Language eng
DOI 10.1002/iroh.200410753
Field of Research 070401 Aquaculture
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2005, WILEY-VCH Verlag GmbH & Co. KGaA
Persistent URL http://hdl.handle.net/10536/DRO/DU:30008859

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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