Hematologic study of red pacu (Colossoma brachypomum).
A study of a laboratory population (N = 60) of immature red pacu (Colossoma brachypomum) was conducted for the purpose of characterizing hematological parameters. Median (2.5th - 97.5th percentile) values obtained by hemocytometer counts, spun packed cell volume, refractometer, and differential counts were as follows: packed cell volume 25.8 (22.0 - 32.0) %, total plasma solids 4.0 (3.4 - 4.7) gm/dl, red blood cell concentration 1.68 (1.15 - 2.94) x 10(3) microliter, white blood cell concentration 33.5 (13.6 - 52.3) x 10(3) microliter, heterophils 3.2 (0.3 - 16.8) x 10(3) microliter, non-staining granulocytes 0.4 (0.05 - 1.9) x 10(3) microliter, eosinophils 0.2 (0.1 - 0.3) x 10(3) microliter, lymphocytes 21.0 (8.2 - 35.6) x 10(3) microliter, granular lymphocytes 1.4 (0.4 - 5.6) x 10(3) microliter, and monocytes 1.2 (0.4 - 4.4) x 10(3) microliter. Blood cell measurements were taken and descriptions given of the blood cells encountered on the stained smear A modified leukocyte slide estimate formula [(avg. # leukocytes/10 HPF x 2,000) + 6,3001 (/microliter) had better agreement with Neubauer hemocytometer white cell counts than the method used for avian species.
Tocidlowski
M. E.
ME
Department of Companion Animal and Special Species Medicine, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27606.
Lewbart
G. A.
GA
Stoskopf
M. K.
MK