Browsing by Author "Nishanthi, S."

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    Preliminary Study on Fishery of Gurunagar in Jaffna, Sri Lanka Penaeus monodon
    (Uva Wellassa University of Sri Lanka, 2020) Nishanthi, S.; Wickramaratne, I.U.
    Gurunagar is one of the major fishing centers and its production rate also high compared with other fishing villages in Jaffna west. Effective sustainable fisheries management measures were not highlighted in Gurunagar fishery previously. This study aimed at collecting information on fishing practices, species composition, fish production, catch per unit effort, supply chain and market structure, and the level of awareness of fisher community as baseline information on fishery sustainability to improve fishery management. This study was carried out from October 2019 to January 2020. Primary data were pre-tested and collected using a questionnaire from 60 individuals, personal interviews, and direct field observation. Secondary data were collected from the Fisheries Department at Jaffna, and journal articles. Data were analysed statistically. The study revealed that a total of 12 types of fishing gears and 5 types of fishing crafts used in Gurunagar fishery. A total number of 53 species, representing 32 families were identified in the Gurunagar fish landing site during the study period. Average fresh fish and dried fish production were found 606 Mt and 56 Mt from October to December, respectively. Fishers caught 8 to 19 kg/100 net square meter-hours, 1 to 2 kg/100 net square meterhours, 1 kg/100 net square meter-hours, and 3 to 4 kg/100 hook-hours using a trawl net, gill net, stake net, and long line on average, respectively. Gurunagar fishery supply chains represented both local and foreign market interventions. Average profit/kg for prawns, seer fish, and needle cuttlefish were 1700, 565, and 425 LKR respectively. Gurunagar fisher community has moderate awareness of the importance of fishery sustainability. Current study findings may pave the way to improve the fishery management system of the Gurunagar area. Keywords: Gurunagar, Supply chain, Fishery sustainability, Catch per unit effort, Awareness
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    Yield Response of Cowpea (Vigna unguieulata L. Walp) to Different Soil Compaction Levels
    (Uva Wellassa University of Sri Lanka, 2018) Thadshaini, G.; Nishanthi, S.; Geretharae, T.
    Soil compaction is recognized as one of the major forms of soil degradation. Soil compaction may increase soil potency and thereby can affect on crop production. Under this context, a pot experiment was conducted to see the effect of soil compaction on yield attributes of cowpea (cv. Wijaya) in sandy regosol at the Crop Farm, Eastern University, Sri Lanka. The experiment was arranged in a Completely Randomized Design (CRD) with three replicates. Soil compaction at different bulk density levels (1.60, 1.80, and 2.00 g cm 3) was tested and 1.33 g cm-3 was used as the control. All other agronomic practices were followed as per the recommendation of the Department of Agriculture. The measurements were taken at the harvesting stage 60 days after sowing (DAS) of cowpea. The results revealed, the yield parameters such as number of pods, pod length, average number of seeds per pod, and average pod yield per plant of cowpea were significantly (p < 0.05) reduced by the higher level of soil compaction compared to the control. The highest performance reduction of above parameters was recorded at the compaction level of 2.00 g cm-3 followed by 1.80 g cm 3. Most of the above parameters in the crop treated with the compaction level of 1.60 g cm -3 were comparable with control. Therefore, it can be concluded that soil compaction level greater than 1.60 g cm-3 significantly reduces the yield attributes of cowpea.