Some erythrocyte parameters have been studied in Spanish Merino sheep. Means of GSH increase significatively in animals from 0.5 to 4.5 years old, but beyond this age means have no significative decrease. Averages of erythrocyte catalase activity are decreasing in sheep from 0.5 to 8.5 years old, and the data were proved to agree with a regression line without significative deviations. Erythrocyte potassium levels do not seem to be influenced by age, so in animals from 0.5 to 8.5 years old the means are similar.

M. R de la Haba, A. Moreno, D. Llanes, A. Rodero

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume XV. Beef cattle, sheep and pig genetics and breeding, fibre, fur and meat quality., , 115–118, 1990
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