Impairments in Haematological Parameters of Saprolegnia spp. Infected Tench,Tinca tinca

Authors : Syed Lal SHAH

Pages : 313-318

View : 25 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Haematological parameters of tench insert ignore into journalissuearticles values(Tinca tinca); infected by Saprolegnia spp. were studied. All parameters, except mean corpuscular volume insert ignore into journalissuearticles values(MCV);, decreased in response to infection. A significant insert ignore into journalissuearticles values(P < 0.05); decrease was observed in haemoglobin insert ignore into journalissuearticles values(Hb); insert ignore into journalissuearticles values(-26.85%);, red blood cell count insert ignore into journalissuearticles values(RBCc); insert ignore into journalissuearticles values(-20.94%);, leucocrit insert ignore into journalissuearticles values(Lct); insert ignore into journalissuearticles values(-24.14%);, and mean corpuscular haemoglobin concentration insert ignore into journalissuearticles values(MCHC); insert ignore into journalissuearticles values(-9.06%);. Haematocrit insert ignore into journalissuearticles values(Hct);, white blood cell count insert ignore into journalissuearticles values(WBCc);, and mean corpuscular haemoglobin insert ignore into journalissuearticles values(MCH); also decreased insert ignore into journalissuearticles values(-7.66%, -12.44%, and -6.19%, respectively);; however, differences between the infected and control groups were not significant. Among the parameters, only MCV had a non-significant increase insert ignore into journalissuearticles values(+7.84%); in the infected fish. The study results show that saprolegniasis caused anaemia and immunosuppression, followed by mortality in tench. Mortality was attributed to haemodilution caused by haemorrhaging and the breakdown of osmotic balance due to tissue insert ignore into journalissuearticles values(skin and muscular layer); destruction via the penetration of the hyphae; however, lethargy was another mortality promoting factor. Mortality among the Saprolegnia-infected fish also depended upon the initial site of infection, type of tissue destroyed, growth rate of the fungus, and ability of individual fish to withstand the stress. The present study was conducted to investigate physiological impairment in Saprolegnia-infected Tinca tinca under laboratory conditions; however, further studies at the population level in natural habitats and under similar stress conditions are needed.
Keywords : Turk J Vet Anim Sci 2010, 34 313 318 Turk J Vet Anim Sci, vol 34, iss 4