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dc.contributor.authorGopalan, U.K.
dc.contributor.authorPurushan, K.S.
dc.contributor.authorSanthakumari, V.
dc.contributor.authorKunjamma, P.P.M.
dc.identifier.citationProceedings of Symposium on Coastal Aquaculture, vol.1.; 1982; 151-159
dc.description.abstractHigh density, short-term culture experiments on the shrimp Penaeus indicus were carried out by setting three identical enclaves (25 m2 each) using plastic netting and bamboo stakes in a paddy-cum-prawn filtration field at Narakkal during January-April, 1979. Each of the enclaves was stocked with 500 juveniles of 24-48 mm length having a modal size of 36 mm and average weight of 272 mg. Feeding with ground-nut oil cake was done once daily at the level of 5% of the body weight of shrimps. The cultures were harvested after 4, 8 and 12 weeks when the survival rates of 85.2%, 81.85% and 65.0% respectively were obtained. In the first harvest, shrimps measured 69-96 mm with a modal size of 84-mm and weighed 3.76 g on average. Those netted after 8 weeks had a length range of 75-108 mm with mode at 93.0 mm and average weight of 5.35 g which was 1.42 times greater than that of the preceding. Size range of shrimps in the third harvest shifted between 105 and 129 mm with 117 mm at the mode and had an average weight of 11.22 g i.e. 42.25 times greater than that of the initial stock. The total yields of 1.601, 2.186 and 3.646 kg realised from these cultures became equivalent to 640.0, 874.0 and 1458.0 kg/ha. Since it is possible to take a minimum of two short-term crops of 12 weeks duration, it is reasonable to assume that at 80% harvesting efficiency, the production of about 1750 kg/ha of marketable shrimps valued at Rs. 35,000 - could be possible from fertile 'Pokkali' fields of Kerala. During the course of experiments the temperature, salinity, pH and secchi disc reading of the field varied between 28.5 and 35.5~'C, 17.2 and 26.15 ppt, 7.0 and 7.8 and 35 and 60 cm respectively. Diurnal oxygen level fluctuated between 1.0 ml/l and 6.8 ml/l. Results of the present experiment indicate that P. indicus merits further field experiments as a species for short-term, high density farming
dc.relation.isbasedonSymposium Coastal Aquaculture
dc.subject.otherFishing Nets
dc.subject.otherBrackishwater Aquaculture
dc.subject.otherExperimental Research
dc.subject.otherShrimp Fisheries
dc.subject.otherPrawn Culture
dc.subject.otherPenaeus indicus
dc.subject.otherISW, India, Kerala, Vypeen I.
dc.titleExperimental studies on high density, short-term farming of shrimp Penaeus indicus in a Pokkali field in Vypeen Island, Kerala
dc.typeConference Article
dc.affiliation.authorCSIR-National Institute of Oceanography, Kochi, Kerala, India

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