Seasonal Values of Selected Blood Parameters of Farm-Raised Channel Catfish (Ictalurus Punctatus) in the Mississippi Delta

Author:

Leard A. Timothy1,Wagner Bruce A.2,Camp Karen L.1,Wise David J.3,Gao Xio Dan1

Affiliation:

1. College of Veterinary Medicine, National Warmwater Aquaculture Center, Mississippi State University, Stoneville, MS 38776

2. National Animal Health Monitoring System, USDA: APHIS: VS, Fort Collins, CO 80521

3. Mississippi Agricultural & Forestry Experiment Station, National Warmwater Aquaculture Center, Mississippi State University, Stoneville, MS 38776

Abstract

Hematocrit, sodium, chloride, potassium, calcium, glucose, and pH were measured in whole blood of 1,522 channel catfish collected from 3 commercial food-fish ponds in the Mississippi Delta. Samples were collected from March 1995 to March 1996 to monitor seasonal fluctuations. A total of 10–20 fish were arbitrarily collected with snag lines from each pond on each sample day. The mean monthly hematocrits fluctuated seasonally from a low of 14.5% in midwinter to a high of 25.7% in midsummer (annual = 21%, SE = 0.15). Sodium levels were consistent throughout the year with a mean (SE) of 134 (0.13) mM/liter. Mean chloride values for the year were 120 (0.14) mM/liter but increased to 132 mM/liter in midwinter. By March 1996, the chloride levels had returned to levels observed during spring 1995. Potassium and glucose levels varied throughout the year with means of 4.43 (0.06) mM/liter and 26.9 (0.46) mg/dl, respectively, and coefficients of variation of 51.8% and 63.3%, respectively. Calcium and pH values were fairly stable with means of 1.31 (0.004) mM/liter and 7.13 (0.004), respectively. All parameters except glucose and potassium may be adequately evaluated with a sample size of 25 or less. These data were collected to provide baseline information for ongoing pond health studies.

Publisher

SAGE Publications

Subject

General Veterinary

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