Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Mayhew
1952
Mallard
E 48
Undipped Eggs
Experimental Relative Humidity No.set No.fertile No.hatched %hatched
40% 95 55 0 0
65 85 63 2 3
75 85 64 82 10 5 8 12
85 104 67 0 0
90 76 49 0 0
Totals 445 298 7 —
Dipped Eggs
Relative Humidity No.set No.fertile No.hatched %hatched
40% 45 40 10 25
65 55 44 16 36
75 60 46 25 54
85 50 41 7 17
90 45 38 0 0
Totals 255 209 58 —
Total Eggs Set
Relative Humidity No.set No.fertile No.hatched %hatched
40% 140 95 10 10
65 140 107 18 17
75 145 110 30 27
85 154 108 7 6
90 121 87 0 0
Totals 700 507 65 —