. Bulletin. Natural history; Natural history. Aug. 1981 Sanderson & Anderson: Waterfowl 683 the ducks fed corn and of those fed corn and slag were similar at the beginning of the study and also at its termination. The ducks fed corn and those fed chow gained more weight, on the average, than their counterparts receiving slag (Table 15). However, the differences were not signifi- cant. The patterns of change in body weight during the experiment for the ducks fed corn and slag and those fed com were almost identical through the 4th week Fig. 12.âMean change in body weight of juveniie male ma
. Bulletin. Natural history; Natural history. Aug. 1981 Sanderson & Anderson: Waterfowl 683 the ducks fed corn and of those fed corn and slag were similar at the beginning of the study and also at its termination. The ducks fed corn and those fed chow gained more weight, on the average, than their counterparts receiving slag (Table 15). However, the differences were not signifi- cant. The patterns of change in body weight during the experiment for the ducks fed corn and slag and those fed com were almost identical through the 4th week Fig. 12.âMean change in body weight of juveniie male mallards fed corn or corn plus slag for 8 weeks. Vertical lines indicate standard errors. The mean initial and final body weights for each group of ducks are given in parentheses. None of the differences between means for the weekly and biweekly periods were statistically significant (P>). N = 10 in each group. +100 T^T (12299). (DEC. 6) WEEKS OF STUDY = CHOW +100-1 = CHOW + SLAG (I344g) +80- T A +60- +iio- ^-â--^=''Tr ~y^~~~ +20- (uasgL^^'â^^ / ^ -20- (1241g) -i|0- -60- III 1 0 1 2 i\ (OCT. 11) WEEKS OF STUDY ~ (1226g) (DEC, 6) Fig. 13.âMean change in body weight of juvenile male mallards fed chow or chow plus slag for 8 weeks. Vertical lines indicate standard errors. The mean initial and final body weights for each group of tlucks are given in paren- theses. None of the dif- ferences between means for the weekly and biweekly periods were statistically significant (P>). N = 10 in each group. Fig. 14.âMean change in packed cell volume (PCV) for juveniie male mallards fed corn or corn plus slag for 8 weeks. Vertical lines indicate standard errors. The mean initial and final PCVs for each group of ducks are given in parentheses. None of the differences between means for the weekly and biweekly periods were statistically significant(P> ). N = 10 in each group. +b,U-| = CORN +5,0- = CORN + SLAG / \ +4,0- + / ^ i- -^^ "^1 1() + + ()
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