Efficiency of Fixed-Width Transect and Line-Transect-based Distance Sampling to Survey Red Junglefowl (Gallus gallus spadiceus) in Peninsular Malaysia
Reliable survey method is very important to estimate wildlife population. In this study, fixed-width strip- and line-transect samplings were simultaneously used to yield population estimates on oil palm plantation. The latter was found to be more accurate but less precise than the former based on...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
2008
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| Online Access: | http://psasir.upm.edu.my/id/eprint/7410/1/Efficiency%20of%20Fixed.pdf |
| Summary: | Reliable survey method is very important to estimate wildlife population. In this study, fixed-width strip- and
line-transect samplings were simultaneously used to yield population estimates on oil palm plantation. The latter was
found to be more accurate but less precise than the former based on the Per cent Relative Bias (hereafter PRB). Using
the strip-transect, an overall density and abundance were estimated at 0.3237 birds/ha and 3 018 ± 273 birds (CV =
9.05%), respectively. An unbiased overall density generated by line-transect, D ± S.E. = 0.500 ± 0.069 birds/ha (95%
CI: 0.38137 - 0.65521) and estimated total abundance, N ± S.E. was 4 661 ± 644 birds (95% CI: 3 556 - 6 109; CV =
13.81%) for the entire 9 323.53 ha study area. The former and latter method gave relative and absolute estimates,
respectively. |
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