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Assessing Breeding Populations of Ducks by Ground Counts

Table 10


Table 10. Changes in five population components of mallards at five different periods on single days during laying and early incubation, Kindersley Study area, 1959.
  0800 hours 1300 hours 1800 hours
Prs. Lone Males Grp. Males <5 Lone Females Grp. birds Prs. Lone Males Grp. Males <5 Lone Females Grp. birds Prs. Lone Males Grp. Males <5 Lone Females Grp. birds
May 11 61 53 53 1 9:0 80 35 52     98 35 45    
May 15 42 44 61   4:1 55 45 58   5:1 53 33 28 1  
May 16 42 44 66     50 37 56     67 29 19 2  
  0530 hours 1530 hours  
Prs. Lone Males Grp. Males <5 Lone Females Grp. birds Prs. Lone Males Grp. Males <5 Lone Females Grp. birds
May 16 18 42 64     73 41 44    
% all birds 25 30 45     63 18 19    
Ratio 100: 233: 356     100: 56: 60    

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