Ecology and density estimates of great argus (Argusianus argus) in Bala forest
2002
Siriphon Thong-ari(National Park , Wildlife and Plant Conservation Department, Bangkok (Thailand)) | Prasit Wongphrom(National Park , Wildlife and Plant Conservation Department, Bangkok (Thailand))
Study on the ecology and density estimates of Great Argus (Argusianus argus) in Bala Forest, Narathiwat, Thailand has been conducted by surveying and call count method, observing, and camera trap setting in 11 trails totaling of 74.4 kilometers between January 2001 to April 2002. Density estimates were developed using DISTANCE software (Buckland et. Al. 1993). The results reveal that Great Argus is found at the altitude ranging from 100-900 m.s.l but most frequently occurred between 401-500 m.s.l (23.9 percent, N=301). 85.7 percent of pictures from camera traps indicated that Great Argus is solitary. Breeding period of Great Argus as indicated by frequency of calls was between March and August and peaked in July (17.3 percent, N=301). There were 20 dancing grounds found in the area at the altitude between LT 100-700 m.s.l with half found at GT 100-200 m.s.l and 501-600 m.s.l (25 each). Each dancing ground was marked as male territory. The nesting ground was found 100-300 m away from the dancing ground with clutch size of 2 eggs. Hatching period took 27 to 29 days. Main predator of chick was Boiga cyanodon. Molting period was either after the breeding period or after the chick was two months old (October-November). Density of Great Argus was 0.45 individual per km2 (range=0.29-0.74) (estimated at 95 percent confidence intervals), or the average of 50 individuals (range=32-80) of Great Argus in Bala Forest.
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