Effect of antibiotics on immunophysiological status and their taste attractiveness for rainbow trout Parasalmo (=Oncorhynchus) mykiss (Salmoniformes, Salmonidae)
2011
Maklakova, M. E. | Kondratieva, I. A. | Mikhailova, E. S. | Stupin, R. V. | Khapchaev, Sh. Yu | Kasumyan, A. O.
Effect of three- and fivefold intramuscular injections of antibiotics oxytetracyclin hydrochloride and benzylpenicillin sodium (20 mg/kg) on immunophysiological status of juveniles of rainbow trout Parasalmo (=Oncorhynchus) mykiss (pathomorphological evaluation of internal organs, determination of the number of different types of leucocytes in the blood, and electrophoretic investigation of protein profile of the blood serum) was investigated. It was determined that both antibiotics cause neutropenia, removal of albumin fraction in the blood serum, and appearance of lipoid assemblages and different pathologies of internal organs. Taste attractiveness of oxytetracyclin hydrochloride, benzylpenicillin sodium, cefazolin-akos, and neomycin sulfate at the concentration in artificial food pellets of 1, 10, and 100 mg/ml was evaluated. It was determined that neomycin sulfate has more preferable taste for fishes, cefazolin-akos is less attractive, and reaction of fishes to oxytetracyclin hydrochloride and benzylpenicillin sodium depends on their concentration. The presence of two strongly different behavioral stereotypes of testing of food taste was confirmed.
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