Table 3. Weight Characteristics of the Greater Prairie Chicken (cf. 



Figure 12). Headings as in Table 2. 



in X±2— Sx V n 



Sample Weights " 



Males 700-1100 951.20 ± 10.48 52.92 5.56 101 



Females 650- 950 807.30 ± 11.38 54.25 6.72 91 



Adults 750-1100 911.30 ± 16.12 81.70 9.00 103 



Young 650-1050 853.00 ± 19.88 93.75 10.99 89 



Old males 775-1100 975.40 ±: 10.62 39.75 4.07 56 



Young males 700-1025 926.40 ± 18.32 61.50 6.63 45 



Old females 750- 950 834.90 ± 11.82 40.50 4.85 47 



Young females 650- 875 777.90 ± 15.68 52.00 6.68 44 



The average weight of the males, 951 grams, is significantly 

 greater than that of the females, 807 grams, and the average weight 

 of the adults, 911 grams, is significantly greater than that of the 

 young, 853 grams. Furthermore, each sex- and age-class (old fe- 



YOUNG FEMALES 



OLD FEMALES 



YOUNG MALES 



OLD MALES 



ALL YOUNG 



ALL ADULTS 



ALL FEMALES 



ALL MALES 



I 1 1 ' 1 ' ' ' 1 



600 700 800 900 1000 MOO 



Groms 



Fig. 12. Variation in the weight of the greater prairie chicken by 

 sex and age (cf. Table 3). Diagrams prepared as for Figure 23. 



[42] 



