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Food supplements modulate changes in leucocyte numbers in breeding male ground squirrels

Gwendolyn C. Bachman

School of Biological Sciences, University of Nebraska, Lincoln, NE 68506-0118, USA e-mail: gbachman{at}unl.edu

View larger version (19K): [in a new window]   Fig. 1. Total body mass (means ± S.E.M.) of un-provisioned (control) males.

View larger version (22K): [in a new window]   Fig. 2. (A) The number of leucocytes in blood smears from provisioned (filled bars) and control (open bars) male Belding's ground squirrels. (B) Total neutrophil (filled black bars) and lymphocyte (striped bars) counts from provisioned and control (open bars) squirrels. (C) Banded and segmented neutrophil counts from provisioned (solid bars) and control (open bars) squirrels. Sample sizes are shown at the base of each bar, and overhead bars indicate significant differences from Bonferroni-adjusted t-tests. *Bonferroni P≤0.05; **P≤0.01; ***P≤0.01. Values are means ± S.E.M.

View larger version (15K): [in a new window]   Fig. 3. Change in mean neutrophil numbers in relation to mass from shortly after emergence from hibernation (Sample 1) to the start of breeding (Sample 2). Provisioned males (solid) and control males (open). P=0.035, r=0.611, N=12.