. Bulletin. Natural history; Natural history. 684 Illinois Natural History Survey Bulletin Vol. 32, An. 4 (Fig. 12). Similarly, the patterns of change for the ducks fed chow and slag and those fed chow were also much alike through the 4th week (Fig. 13). Between the 4th and 6th weeks the ducks fed com and those fed chow lost an average of 43 and 50 g, respectively. For purposes of com- parison, the ducks fed com and slag gain- 3. Fig. 15.âMean change in packed cell volume (PCV) for juvenile male mallards fed chow or chow plus slag for 8 weeks. Vertical lines indicate standard errors. The mean
. Bulletin. Natural history; Natural history. 684 Illinois Natural History Survey Bulletin Vol. 32, An. 4 (Fig. 12). Similarly, the patterns of change for the ducks fed chow and slag and those fed chow were also much alike through the 4th week (Fig. 13). Between the 4th and 6th weeks the ducks fed com and those fed chow lost an average of 43 and 50 g, respectively. For purposes of com- parison, the ducks fed com and slag gain- 3. Fig. 15.âMean change in packed cell volume (PCV) for juvenile male mallards fed chow or chow plus slag for 8 weeks. Vertical lines indicate standard errors. The mean in- itial and final PCVs for each group of ducks are given in parentheses. Statistically significant (P<) dif- ferences occurred between means for the two groups of ducks at the ends of the 4th and 6th weeks. N = 10 in each group. WEEKS OF STUDY Table 16.âMean weights (plus or minus the standard error) of the liver, kidneys, gizzard and proventriculus, and adrenals from juvenile male mallards fed corn or corn plus slag for 8 weeksâ11 October-6 December 1976. The differences between paired means are not statistically significant. N = 10 in each group. Weight Organ or Gland Com Com + Slag Percent of Body Weight at End of Experiment Com Com + Slag Liver Kidneys Gizzard and proventriculus Adrenals ± g ± ± ± mg ± ± g ± |± mg ± ± ± ± ± ± ± ± â¢PtrcCTt X 10'' Table 17.âMean weights (plus or minus the standard error) of the liver, kidneys, gizzard and proventriculus, and adrenals from juvenile male mallards fed commercial maintenance chow or chow plus slag for 8 weeksâ11 October-6 December 1976. N = 10 in each group. Weight Percent of Body Weight at End of Experiment Organ or Gland Chow Chow + Slag Chow Chow + Slag Liver Kidneys Gizzard and proventriculus . Adrenals 25,l± ±^ Â
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