Influence of Body Size on Blood Hemogram in Rainbow Trout Oncorhynchus Mykiss (Walbaum, 1792)

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Authors

  • Francesco Fazio Department of Veterinary Sciences, University of Messina, Polo Universitario dell’ Annunziata, 98168, Messina, Italy
  • Concetta Saoca Department of Veterinary Sciences, University of Messina, Polo Universitario dell’ Annunziata, 98168, Messina, Italy
  • Irene Vazzana Department of Veterinary Sciences, University of Messina, Polo Universitario dell’ Annunziata, 98168, Messina, Italy
  • Giuseppe Piccione Department of Veterinary Sciences, University of Messina, Polo Universitario dell’ Annunziata, 98168, Messina, Italy

DOI:

https://doi.org/10.17140/VMOJ-2-121

Keywords:

Body size; Biometric indices; Hematological parameters; Trout.

Abstract

Aim: The aim of this study was to investigate the influence of body size on hematological parameters in Rainbow trout Oncorhynchus mykiss (Walbaum, 1792).
Materials and Methods: For the purpose of the study, fifty Italian trout were divided into two
groups: Group S1 (n=25) of weight (300-500 g) and length (25-32 cm); Group S2 (n=25) of
weight (510-700 g) and length (33-38 cm). Blood samples were collected from each fish, to
record the count of white blood cell (WBC), red blood cell (RBC), determine the hemoglobin
concentration (Hb), hematocrit (Hct) value, mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH) mean corpuscular hemoglobin concentration (MCHC), and thrombocyte count (TC).
Results: The collected blood was analyzed using an automatic method to determine the hematological parameters. Statistical analysis (unpaired t-test) showed a significant effect of size
(p<0.05) on the RBC count, Hb concentration and Hct value. No statistically significant differences were observed in the WBC count, MCV, MCH concentration, MCHC and TC.
Conclusion: The data reported in this study contributed towards the knowledge of hematological evaluation in farmed trout and showed that fish size was an important factor that helped
establish the “physiological range” supporting the accurate interpretation of hematological parameters in examining the health status of this species.

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Published

2017-11-30

How to Cite

Francesco Fazio, Concetta Saoca, Irene Vazzana, & Giuseppe Piccione. (2017). Influence of Body Size on Blood Hemogram in Rainbow Trout Oncorhynchus Mykiss (Walbaum, 1792). Veterinary  Medicine, 2(3), 91–94. https://doi.org/10.17140/VMOJ-2-121

Issue

Volume 2 Issue 3 2017

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Articles

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