Abstract: | In the present paper the authors presents the results of fish growing during the 2008 year summer, in the two experimental ponds from the Fishing Farm Podu Iloaiei – Iasi, with and without anti-parasite treatments. at variant 1 (the control) no preventive anti-parasite treatments were accomplished, while at the variant 2 both different treatments were realized: with chloride lime before population (3 kg/ha) and weekly during July 25- September 1 (10-12 kg per basin) and triclorphone, in a unique dose 0,3mg/l water and oxitetracicline in the food for 6 days, from the beginning of August (50 mg/kg fish). After 102 days from the experiment, at variant 2, the crap sapling registered an supplementary increase of 8,7% and an efficiency of food conversion higher with 8,79% comparative with the control. In physiological plan, we observed higher level of hematological prosperity at fish from the variant with the treatment comparative with the control. So, the average level of hemoglobin is 6.66% higher when comparing with the control, and the number of erythrocyte with 16%. The fishes from the variant B proved an enhanced adaptive efficiency of respiration. At this variant we took in consideration a higher respiratory surface comparing with the control, by totalizing the surface of a higher number of globules with a more reduced individual volume. The parasite infestations with protozoa and metazoan were significant reduced (- 8%) at variant 2 comparing with the control. |
