Browsing Volume 07 October 1998 by Title

Now showing items 10-13 of 13

Seasonal Trends of Anopheles culicifacies Population and Its Sibling Species Status at Gomadiyagala-A Village in the North -western Province of Sri Lanka

de Silva, B.G.D.N.K.; Gunasekera, Maya B.; Abeywickreme, W.; Wickramasinghe, M.B.; Karunanayake, E.H. (1998)

Anopheles culicifacies s.s and An. subpictus were the most predominant species found in this study area and accounted for 31.2% and 41.4% respectively of the total mosquitoes collected from the cattle - baited hut ...
Studies on Diel Feeding and Digestibility of Cyanobacteria

Kariyawasam, L.M.; Piyasiri, Swarna (1998)

Beira Lake is eutrophic and covered with a bloom of Cyanobacteria. Hybrids of Oreochromis niloticus and Oreochromis mossambicus dominate the lake. Present study deals with feeding cycle and digestibility of the bloom by ...
Trophic Status of Beira Lake

Nahallage, Charmalie; Piyasiri, Swarna (1998)

Beira Lake is located in the heart of the city of Colombo.and in an highly urbanized catchment of 432 ha. Beira Lake covers 65.4 ha and comprises four main basins the East Lake, the Galle Face Lake, the West Lake and the ...
Vibrational Modes of a Rabana (Drum)

Wijeratne, Agra T.; Peiris, M.G.C.; Dharmapriya, G.G. (1998)

The vibrational modes of a "Virindu" Rabana membrane (of diameter 13 inches), which was driven by a loudspeaker, were studied by using a microphone.The vibrational modes were observed at frequencies below 500Hz. The nodal ...

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