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- Title
Abnormal Eggs and Incubation Behavior in Northern Bobwhite.
- Authors
Hernández, Fidel; Arredondo, Juan A.; Hernández, Froylán; Bryant, Fred C.; Brennan, Leonard A.
- Abstract
A long-term (>5 years) study of Northern Bobwhite (Colinus virginianus) provided the first record of runt eggs and two observations of prolonged incubation. During 2004, we located two clutches (n = 11 and 9 eggs)--laid by the same hen--consisting entirely of runt eggs. Mean length, width, and mass were 18.8 mm, 15.4 mm, and 2.0 g, respectively, 26% of the volume and 24% of the mass of typical bobwhite eggs. Based on out long-term data set for bobwhites (n = 3,566 eggs), runt eggs occur at a frequency of 0.56%, within the range (0.02-4.32%) reported for other avian species. The two records of prolonged incubation behavior represented 75 days (326%) and 47 days (204%) beyond the normal incubation period (23 days) of bobwhites. This prolonged incubation behavior is in excess of the time frame reported for most birds exhibiting prolonged incubation (50-100% beyond normal incubation).
- Subjects
NORTHERN bobwhite; EGG incubation; EGGS; BIRD embryology; BOBWHITES
- Publication
Wilson Journal of Ornithology, 2006, Vol 118, Issue 1, p114
- ISSN
1559-4491
- Publication type
Article