RESEARCH ON THE CURRENT STATUS OF PARASITE INFECTION IN SOME MARINE FISH SPECIES IN NGHE AN PROVINCE

Abstract

A total of 447 marine fish samples, belonging to 45 species, 24 families and 7 orders, were collected from several coastal areas of Nghe An province and dissected for parasitological examination. The order Perciformes showed the highest diversity, with 34 species from 18 families, followed by Mugiliformes with 5 species from 1 family and Clupeiformes with 2 species from 1 family. The remaining orders included Anguilliformes, Scorpaeniformes, Aulopiformes and Beloniformes each had only 1 species recorded. The number of species per family ranged from 1 to 9, the most abundant is the Carangidae family and the number of individuals per species ranged from 1 to 24, the most numerous is the Osteomugil cunnesius. The survey results indicated that 37 fish species (82.22%) were infected with at least one parasite taxon. In total 325 fish samples (72.71%) were infected with 1 to 4 parasite groups. Among them, monogenea and trematoda were the most common, with infection rates of 30.43% and 20.81%, respectively. Other parasite groups included Crustacea (13.42%), Nematoda (6.94%) and Acanthocephala (1.12%). The average infection intensity was 7.58 worms per infected fish. Of which, Trematoda had the highest infection intensity (8.82), followed by Nematoda (8.65), Monogenea (7.98), Crustacea (4.03) and Acanthocephala (2.40) which had the lowest.