High Beetle Diversity at Lanjak Entimau, sarawak, Malaysia

An expedition by Academy of Science Malaysia to the inaccessible Lanjak Entimau, Sarawak on Borneo Island was conducted in June 2008. Using 20 light traps, 15 Malaise traps and 250 pitfall traps set up at 5 sites, a total of 1,307 beetle from 39 family and 227 species were sampled.The most abundant family were Scarabaeidae followed by Chryosmelidae and Curculionidae. The most abundant beetles were sampled both at Begua and Kawi river both asssembling 89 species. The most species collected (N=380) was an unidentified species from family Lycidae followed by Stephanodes coffea (N=82)( family Scolytide) and the water beetle Hydrovatus bohvouloiri (family Dystiscidae) (N=82). The best trapping method was using light traps (margalef index, 15.515)compared to pitfall (margalef index, 4.242). There was high diversity (Simpson diversity index,0.90; Shannon weiner index, 3.67) of beetles at Lanjak Entimau indicating that Lanjak Entimau is still intact.189 species were identified from this expedition.