tailieunhanh - Báo cáo khoa học: "Comparison of Diagnostic Methods for the Detection of Parasites in Fish"

Tuyển tập báo cáo nghiên cứu khoa học của trường đại học nông nghiệp 1 đề tài: Comparison of Diagnostic Methods for the Detection of Parasites in Fish. | Journal of Science and Development April 2008 136-144 HANOI UNIVERSITY OF AGRICULTURE COMPARiSON OF DiAGNOSTiC METHODS FOR THE DETECTiON OF PARASiTES iN FiSH Kim Van Van Dinh Thi Thuy Faculty of Animal and Aquacultural Science Hanoi University of Agriculture Research Institute for Aquaculture II ABSTRACT In recent years Aquaculture has developed very rapidly. However fish parasitic diseases in fry and fingerling occur often. There are many methods which were used to diagnose fish parasites. In this paper fifty wild fish belonging to three fish species roach Rutilus rutilus perch Perca fluviatilis and bream Blicca bjoerkna were collected from Arreso Lake in Copenhagen Denmark in 2005 to diagnose parasites. Parasitological investigation was implemented by normal observation compression digestion and PCR methods at the Fish Disease Laboratory Pathology Department Life Science University Copenhagen Denmark. The results show a high prevalence of eye fluke metacercaria in wild fish 100 of Blicca bjoerkna infected by Diplostomum sp. . Each method has advantages and disadvantages. The classical methods are simple cheap and easy to apply in every fish laboratory. PCR methods produced results rapidly sensitively and exactly. But chemicals and needs exacting technique. Keywords Parasites fish diagnostic. this method costs much for equipment and 1. INTRODUCTION World aquaculture production now accounts for 32 of total fisheries production according to the FAO 2005 . Globally fish provide about 15 of all the animal proteins consumed with variations from an average of 23 in Asia to approximately 18 in Africa and around 7 in Latin America. Total world fisheries production in 2003 was million tonnes of which million tonnes were from aquaculture and million tonnes were from capture fisheries. Total fish production has increased in recent years mainly due to improvements in the aquaculture industries. However intensive aquaculture systems with high stocking densities