نوع مقاله : بیماری ها
نویسندگان
1 مرکزتحقیقات ذخایر آبزیان آب های داخلی، موسسه تحقیقات علوم شیلاتی کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، گرگان، ایران
2 گروه شیلات، دانشکده علوم دامی و شیلات، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In this research investigated the possible causes of mortality of cultivated wild Carp containing 2 densities (2 and 4 individual/m2) in pens in Gorgan Bay between May and June 2013. Mortality started with increasing the temperature (29 till 30.8 °c) in July. Clinical symptoms observed in sick fish include fever, swimming in surface, dark color, Ventricular dilatation, one and two sides exophthalmia and hemorrhage on the body surface. 50 samples of fish at the time of death for autopsy were transferred to the laboratory. The internal organs (kidney and liver) were cultured in the TSA medium. After incubation, purified colonies, the bacteria were identified using diagnostic tests. The results proved that the isolated bacteria were Aeromonas hydrophila.The result of antibiogram test was performed the sensitivity of bacteria to Antroflexacin. To compare mortality in two treatments, it used of the non-parametric tests of Man-Witney and to compare the different times in each of the densities used of Kruskal-Walis test. The results showed there was no significant differences between two treatments (2 and 4 individual/m2) in each months.
کلیدواژهها [English]