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Turkish Journal of Fisheries and Aquatic Sciences 2019, Vol 19, Num, 2     (Pages: 161-166)

Relationship between Non-specific Immune Response and Body Size in Cultured Rainbow Trout

Francesco Fazio 1 ,Concetta Saoca 1 ,Laura Perillo 1 ,Giuseppe Piccione 1

1 University of Messina, Department of Veterinary Sciences, Polo Universitario dell’Annunziata, 98168, Messina, Italy DOI : 10.4194/1303-2712-v19_2_08 Viewed : 547 - Downloaded : 337 The aim of this study was to evaluatesomeblood parametersinvolved in non-specific immunity in order to assess the possible correlationwithbiometric indices(weight and length)in cultured rainbow trout Oncorhynchus mykiss(Walbaum, 1792).For this purposesixty Italian cultured trout (350.00-950.00 g weightrange,28.00-40.00 cm length range)reared in a Sicilian farm were utilized in this research.In the farm, physico-chemical characteristics of water were measured.

From each fish, blood samples were collected to evaluate White Blood Cells Count (WBC),Thrombocyte Count (TC), Ceruloplasmin (Cp), Total Protein (TP), serum albumin and serum protein fractions.

Linear regression analysis was used to evaluate the relationship between the biometric indices and non-specific immune parameters. Results showed a statistically significant correlation between weight andlengthwith ceruloplasmin. Our study suggests that nonspecific immune response in fish changes in relation tobody size; this result is useful in order to obtain a wider knowledge of the non-specific immune parameters that may allow diversified vaccination plans in relation to the different size. Keywords : Biometricindices, Cultured fish,immune response, Oncorhynchus mykiss, Rainbow trout