Infection rate of silver carp (Hypophthalmichthys Molitrix) to LERNAEACYPRINACEA at the warm season in nurturing ponds in Shushtar area ofKhuzestan Province

Regarding the importance of fish farming industry in recent years and especiallyhydrothermal fish nurturing including carp in Iran, created illnesses and injuriesinvestigation in these fishes has especial nature. Of course aquaculture industryfaces with much threat of disease including viral, bacterial, parasitic and other, soto assist this industry, this study was done to assess the risk of silver carp infectionrating (Hypophthalmichthys Molitrix) to LERNAEA CYPRINACEA.Methods:۲۷۵ pieces of fish with the weights above ۱۵۰ g of ۴ farms are located in the cityof Shushtar that have four cardinal directions been caught on September andOctober of ۲۰۰۹. The caught samples were located In ۲۰ liter drums that werecontaining ۱۰% formaldehyde. And then they were transferred to the laboratory ofveterinary medicine, university of Kazeroon. These samples in terms of totallength, standard length, body height and weight were studied. At the next step,infected fish from other fish were isolated and infected fish was assessed in termsof LERNAEA CYPRINACEA infection.ResultsThe results showed that ۹۱ numbers of the total caught fish were infected withLERNAEA CYPRINACEA. The infection frequency of the studied fish to thementioned parasites was ۳۳/۰۹%. Also the relationship investigating between totallength and weight with the infection rate of LERNAEA CYPRINACEA showedthat there is a significant relationship between the above variables (parameters)with the level of infestation.Discussion and conclusion:In this study it was determined that prevalence of Hypophthalmichthys Molitrix toLERNAEA CYPRINACEA, was ۳۳/۰۹%.also the results of this study indicatedthat there is a significant relationship between the total length, standard length, andweight with the infection rate.

کلیدواژه ها:

Hypophthalmichthys Molitrix ، LERNAEA CYPRINACEA ، nurturingpools ، Khuzestan