Investigation on the prevalence and intensity of protozoan and metazoan parasites of some of the warm- water cultured fish species in Mazandaran province

Subject Areas : New Technologies in Aquaculture Development

Received: 2021-02-21 Accepted : 2021-02-21 Published : 2021-02-19

Keywords: Prevalence, Intensity, Mazandaran, Keywords: Parasite, Warm water, Cultured fish,

Abstract :

AbstractThe main objective of the present study is identification of parasitic species of some warm-water fish species of Dasht-e-Naz Agriculture Company in Mazandaran province and determining the prevalence and intensity of the infection.The field investigations were conducted during the summer of 2013 and 76 fish specimens including Cyprinus carpio, Ctenopharyngodon idella and Hypophthalmichthys molitrix were examined. Prevalenceand mean intensity were used to describe the parasite populations. The statistical analysis was performed using IBM SPSS Statistics version 19 and the significance for all tests was judged at P < 0.05. A total of 10 parasite species including Trichodina sp., Ichthyophthirius multifiliis, Dactylogyrus extensus, D. anchoratus, D.lamellatus, D. Hypophthalmichthys, D. taihuensis, Gyrodactylus sp., Botheriocephalus gowkongensis and Lenrnaea sp. were isolated from infected fishes. The most number of parasitic species belong to common carp (7 species), and the least is isolated from grass carp and silver carp (1 and 2 parasite species respectively). The total number of parasite species was reported to be positively correlated with the total length and weight of common carp, increasing as host size increased. ANOVA one-way analysis of variance indicates that changes in fish species caused significant changes in the intensity of infection with Dactylogirid species.