Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Mayhew
1952
Mallard
E13
Experimental Eggs from Russell Thomas, 6030 Blank Road,
Sebastopol, California.
candling
(4/7/52)
condition when stopped
all stages from "heat spots" To formation of
down.
Develop.
Infertile.
Stopped
candling
(3/21/52)
Relative No. set
Humidity (3/14/52) Fertile Double Infertile Develop.
40% 30 13 8 11 6 4 9
65% 24 15 6 3 13 5 3
dead embryos.
75% 24 14 2 8 14 0 2
dead embryos.
85% 35 19 7 9 16 6 4
dead embryos.
90% 22 11 6 5 7 6 4
dead embryos.
Relative No. Date Hatched
Humidity Hatched
40% 0 —
65% 0 —
75% 0 —
85% 0 —
90% 0 —
condition of broken eggs
(4/22/53)
% of fertile eggs opened broken
50 0 6
66 0 13
66 0 14
57 0 16
50 0 7
condition of broken eggs (no weights)
6 dead embryos
56 mm; 9.0 gm.
78 mm; 12.8 gm.
62 mm; 9.0 gm.
88 ; 320.2 "
88 " ; 19.6 "
68 " 3/10.7 "
61 " 7.2 "
69 " ; 11.5 "
80 " 3/15.3 "
82; 21.0 45; 5.0 76; 15.4 82; 20.3 67; 9.2
86; 17.5 84; 18.6 75; 13.7 84; 21.7 69; 8.3
73; 16.0 66; 9.9 75; 16.1 80; 17.1 69; 8.3
78; 15.4 72; 15.1 83; 17.7 83; 25.7 93; 22.1 72; 11.3
55; 5.3 84; 17.4 84; 21.3 13;— 44; 5.1
97; 24.6 65; 12.1 87; 24.0 78; 16.9 59; 6.2
58; 7.9 60; 7.5 83; 15.9 75; 14.7
79; 16.4 79; 21.1 68; 10.0