Parasitic Diversity of Siluriform Fishes in Mekong River, Chiang Rai Province

Abstract

A total of 672 Siluriform fishes were collected from Mekong River, Chiang Rai province for parasitic investigation. Twelve species from five fish families were identified; Bagridae (Hemibagrus nemurus, Mystus wyckii), Pangasiidae (Pangasianodon gigas, Pangasius bocourti, Pangasius
conchophilus, Pangasius micronemus, Pangasius sanitwongsei), Schilbeidae (Clupisoma sinensis), Siluridae (Belodontichtys dinema, Kryptopterus cryptopterus, Wallago attu) and Sisoridae (Bagarius bagarius). The parasite assembly consisted of 14 species of monogeneans (Cornudiscoides (1 species), Thaparocleidus (13 species), 18 species of digeneans, Clinostomum (1 species), Dollfustrema (1 species), Haplorchis (1 species), Haplorchoides (1 species), Metadena (2 species), Opisthorchis (2 species), Paracryptogonimus (1 species), Phyllodistomum (1 species), Prosorhynchoides (6 species), Rhipidocotyle (1 species), Unidentified digene (1 species)), 3 species of cestodes (Gephyrolina (2 species), Lytocestus
sp. (1 species)), 4 species of acanthocephalans (Arhythmorhynchus (1 species), Pallisentis (1 species), Polyacanthorhynchus (1 species), Polymorphus (1 species), 7 species of nematodes (Cucullanus (1 species), Monhysterides (1 species), Procamallanus (3 species), Proleptus (1 species), Spinitectus (1 species)) and 4 species of arthropods (Alitropus (1 species), Ergasilus (2 species), Lamproglena (1 species)). The highest diversity of parasites was found in Bagarius bagarius, Hemibagrus nemurus and Clupisoma sinensis with 16, 10 and 9 species of parasites, respectively.