Primary production and fishery potential of reservoirs of Karnataka
Year: 2002
Type: article
Abstract: Gross and net primary production were investigated with respect to depth ineleven reservoirs of Karnataka (latitudes between 11058' and 16045' N) fromthree main river systems (Cauvery, Krishna and Sharavathi) covering the threegeographical zones of the state. Mean gross primary production (GPP) of allreservoirs were 1.26 g C/m2/d, was higher in Cauvery basin than Krishna. Surfacephotoinhibition occurred in most of the reservoirs during the pre-and postmonsoonseasons. Mean net primary production accounted for 61% of the GPP.Mean maximum photosynthetic rate was 63.37 mg C/m3/h with the highest of117 mg recorded in Nugu reservoir. All the reservoirs under small and mediumcategory are found to be productive. Among the large reservoirs, Narayanapuris the most productive and Ghataprabha the least. Based on primary productivityvalues, the reservoirs under small and medium category have an estimatedfish yield potential of 200 kg /ha./yr and those coming under large category have100 kg/ha/yr. Management guidelines to realise the potential yield are presented
Source: Indian Journal of Fisheries
Institution: Central Inland Fisheries Research Institute
Language: English
Subfield: Environmental Chemistry
Field: Environmental Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W375152927