Taeng-On Prommi, tprommi@hotmail.com, Prince of Songkla University, Department of Biology, Faculty of Science, Hat Yai, Thailand, Surakrai Permkam, surakrai.p@psu.ac.th, Prince of Songkla University, Department of Pest Management, Faculty of Natural Resources, Hat Yai, Thailand, and Robert W. Sites, bugs@missouri.edu, University of Missouri-Columbia, Department of Entomology, Columbia, MO.
The adult caddisfly fauna was sampled monthly using portable black light traps downstream from Ton Nga Chang Waterfall in southern Thailand from July 2004 through June 2005. All specimens were identified to the specific level. Similarity in species composition among months was calculated separately for each suborder (Integripalpia, Annulipalpia, Spicipalpia) using Jaccard’s similarity index. Jaccard’s scores were then subjected to cluster analysis to graphically depict patterns of taxonomic compositional similarity among months. In addition, species richness among months was tested for each suborder using ANOVA and a posteriori means separation tests. Flight activity apparently is associated with seasonal climatic conditions. Overall Trichoptera species richness was highest during March through May, which coincides with the end of the dry season in the region.
Keywords: Thailand
