Some population parameters of little spiderhunter (Arachnothera longirostra) at Sungkai Pheasant Breeding Project, Perak

Yatim, Siti Hawa and Mamat, Ismail and Mohd Noor, Mohd Noor Ariri (1991) Some population parameters of little spiderhunter (Arachnothera longirostra) at Sungkai Pheasant Breeding Project, Perak. [Journal / Magazine]

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Abstract

A study of the little spiderhunter population parameters was conducted at Sungkai wildlife reserve, Perak in the months of July, August, September and October of 1987 to 1989. Mark and recapture sampling was used to determine the population size, density, age and sex ratio of these birds. Sampling was carried out on 1.2ha study area. The Schumacher-Eschmayer population estimates was used to calculate the population size. The population density was obtained by dividing them by the trapping area. The population estimated in 1987 was 81.57 + 11.83 birds, and increases to 352 + 27.12 in 1988 and dropped to 221.14 + 24.17 in 1989. The estimated population density was calculated to very high in 1988 (316 birds/ha) followed by 1989 (184 birds/ha) and 68 birds/ha in 1987. Age ratios varies greatly with 96% of adults in the pooled years, showing that their breeding season was already toward the very end when capture were conducted. Sex ratios were significantly different in the pooled years (1987-1989), in favour of more females. Males have the greater tendency of getting retrapped indicating that they might have a smaller home range than the females or they are more trap-happy.

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