http://repo.lib.sab.ac.lk:8080/xmlui/handle/susl/3286 Scientific Magazines articles authored and published by the Faculty or a member of the Faculty 2026-04-19T22:50:10Z http://repo.lib.sab.ac.lk:8080/xmlui/handle/susl/3379 Adescriptive Ethogram for the Behaviour of Balack Robin Saxicoloides Fulicatus Leucopterus(Liunaeus, 1766) in a Semi Developed, Intermediate Zone Habitat of Sri Lanka Perera, Sandun J.; Kotagama, Sarath W. Ad-libitum and focal-animal behaviour sampling was used to construct an ethogram for the behaviour of Black Robin in the wild. The study recorded 53 be- havioural events, in 12 acts under five lypes of be- haviour (6 acts,29 events of self-maintenance be- haviour; 2 acts,10 events of locomotion behaviour; 2 acts, 6 events of reproductive behaviour; 1 act, 3 events of agonistic behaviour; and 5 events of the territorial display). The behavioural acts described here include foraging, elimination, shelter-seeking, resting, cleaning, vocal communication, terrestrial andaerial locomotion, defence, territorial display, pair bonding, nest building, nidification, and the ago- nistic act. The peculiar territorial display of the spe- cies is recorded here, in detail, for the first time. Courtship and mating acts could not be recorded during the study period spanned out side the peak of their breeding season. 2013-01-01T00:00:00Z http://repo.lib.sab.ac.lk:8080/xmlui/handle/susl/3377 A Preliminary Estimation of the Sambar Deer (Rusa unicolor unicolor) Abundance in Horton Plains National Park, Sri Lanka Weerasekera, Danushka S.; Perera, Sandun J.; Thadhani, S. Samarasekara; Jayawardana, N.U.; Rathnasekara, N. L.; Ranawana, K.B. Grasslands are one of the tropics’ most critically threatened habitats, while conservation attempts are rarely concentrated at these ecologically important landscapes. Sambar deer is a large wild ruminant found throughout Sri Lanka, in both grassland and forest ecosystems. Amidst their key position in the trophic web in ‘wet patana’ grasslands of the Horton Plains National Park (HPNP), Sri Lanka, population of sambar deer has not been estimated during recent decades. In this research, field surveys were performed in the total grassland area of 9.4 km2 in HPNP to estimate the density of Sambar deer, for a period of six months, from 1st of January to 31st of June 2018. Sambar deer were sampled along line transects from 1600 hrs -1830 hrs for up to 300m of maximum distance from the line and the distance sampling technique was used to solve imperfect detection for the first time. Counting was carried out for three days per month along a 6.71 km road transect through grasslands. Collected data on sambar deer observations along the transect was analyzed by using the DISTANCE 7.2 computer application. The highest sambar deer density in HPNP was estimated as 113.45 ±11.79 individuals/km2 with a detection probability of 28% in January with an estimated absolute abundance of 1066 ± 110.82 individuals. Our findings indicate consequences of imperfect detection of a statistically strong model.Sambar deer density estimates from this research lays the context for regular surveillance of their population,examining the effects of habitat alterations and assessing the long-term viability of ‘wet patana’ grassland in HPNP, offering insight on the conservation of the fragile habitat of the resident sambar deer population. 2020-01-01T00:00:00Z http://repo.lib.sab.ac.lk:8080/xmlui/handle/susl/3375 The Extension of the Range of the Grey Slender Loris(Loris Lydekkerianus) tothe South-East of Sri Lanka Perera, M. Sandun J.; Rodrigo, Roshan K.; Perera, W. P. Naalin; Samarawickrama, V. A. Prasanna; Asela, M. D. Chandana; Chandranimal, Dilup; Perera, P. G. Dayani R. 2009-01-01T00:00:00Z http://repo.lib.sab.ac.lk:8080/xmlui/handle/susl/3374 A Note on the Orange Headed Ground Thrush Zoothera citrina citrina (Latham) Perera, M. Sandun J. 2007-01-01T00:00:00Z