By: Muhammad Hafiz bin Sulaiman

This expedition is a continuation of previous expeditions to study aquatic insects and the parasites of fish. Sampling began on 17 May 2015 until 21 May 2015. Sampling was conducted at the Kenarong River, Mendelum River, Kejar River and Ruok River. Five species of fish that were caught for the purpose of sampling parasites; Sia, Daun, Sebarau, Kawan and Terbul. Parasite were mostly found on the gills and in the stomach. Parasites found included crustacea, monogenea, cestodes, twin-headed monogenea and nematodes.

For aquatic insects sampling, method used is the sweep netting, sifting and hand collection. Among aquatic insects found are of the Order Ephemeroptera, Coleoptera, Plecoptera, Hemiptera and others. The presence of aquatic insects of the Order Ephemeroptera, Trichoptera and Plecoptera is a benchmark of good water quality of Royal Belum’s river system. However, the impact of devastating floods can be seen by the reduction in individual of aquatic insects collected, the changing of profile of the river and the changing of riverine landscape.