Frequency distribution of conception dates in a white-tailed deer herd

Novak, J. M.; Rhodes, Olin E.; Smith, Michael H.; Johns, Paul E.

doi:10.4098/at.arch.91-10

Cited by 10 publications

(6 citation statements)

References 21 publications

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“…Taking into consideration the outlying values (226-237 days) of some reported gestationals, we calculated the mean fertilization date for does to be between October 23 (SD = 14.25, n = 120) and 26 (SD = 13.41, n = 120), while for yearlings it was calculated to be between October 23 (SD = 13.72, n = 29) and 27 (SD = 12.96, n = 29). Similarly to our results, Rhodes et al (1991) also found no significant differences in fertilization times of yearlings and does in the white tailed deer species.…”

Section: Resultssupporting

confidence: 91%

Determination of time of conception of fallow deer in a Hungarian free range habitat

2014

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Abstract. Our research examined the time of conception of fallow deer in the DALERD South Plains Forestry Private Limited Company's Gyulai Forestry Area. We collected data from pregnant females who had been shot in the hunting season. At the time of evisceration the uterus was removed and dissected; and sex and body weight of embryos were recorded. We were able to collect and analyze 149 samples for our study. Based on the sex and body weight of embryos, we calculated the fertilization date for each animal within our sample group. There were no significant statistical differences found between mean fertilization dates of adult does and yearlings (t = -0.72, p = 0.47). The mean fertilization date of does (with a gestation period of 231.5 days) was October 25 th (SD = 13.82, n = 120); whereas, for yearlings this date was October 24 th (SD = 12.97; n = 29). Based on embryonic development, results showed that in the population we examined, 2 % of females were impregnated in December, 1.3 % in September (at the end of September), 24.2 % in November and the majority, 72.5 % were fertilized in October.

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Section: Resultssupporting

confidence: 91%

Determination of time of conception of fallow deer in a Hungarian free range habitat

2014

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“…Doe fawns commonly breed on the Savannah River Site (SRS) in South Carolina (Urbston 1967(Urbston , 1976). Several investigators have described breeding and reproductive characteristics of doe fawns at SRS (Urbston 1967, Johns et al 1977, Rhodes et al 1986, 1991, Johns 1994.…”

Section: Introductionmentioning

confidence: 99%

Spermatozoan numbers and testicular characteristics of male white-tailed deer fawns during the mating season

Peles¹,

Rhodes²,

Smith³

2000

Acta Theriol.

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. 2000. Spermatozoan numbers and testicular characteristics of male white-tailed deer fawns during the mating season. Acta Theriologica 45: 95-102.Testicular spermatozoan numbers, testes weight, testes length, body weight, and kidney fat index (KFI) were obtained for male white-tailed deer Odocoileus virginianus (Zimmerman, 1780) fawns during the mating season at the Savannah River Site (SRS) in South Carolina. Mean values for testicular spermatozoa, testes weight, and testes length increased significantly over the study period (late October -late December) whereas body weight and KFI did not change with time. Testicular spermatozoa were found in 28% of all fawns examined and the proportion of sexually mature fawns increased greatly over the course of the study and was highest during December. These findings suggest that male fawns breed later than adults at a time that coincides with the mean conception date in doe fawns. Testes weight, testes length, body weight, and KFI were significantly greater in fawns with testicular spermatozoa compared to those without testicular spermatozoa. We suggest that testes weight is closely associated with the presence of testicular spermatozoa in fawns from SRS.

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“…Whereas adult females breed during early November, female fawns reach breeding condition during mid-December -mid-January at SRS (Rhodes et al 1991). Our results demonstrate that spermatozoan numbers and associated reproductive characteristics of adult and yearling males (Fig.…”

Section: Discussionmentioning

confidence: 52%

“…Because successful breeding requires coincident fertile periods between sexes, temporal changes in male reproductive characteristics are most meaningful when examined in relationship to the reproductive cycle of does. In our investigation, the highest mean values for all male reproductive characteristics occurred during a period that included the majority of conception dates for adult does on SRS (mean ± SE = 13 November ± 15 days; Rhodes et al 1991). Because our study did not include the earliest part of the breeding season (ie September -mid-October), higher values for reproductive characteristics could have occurred prior to the beginning of our investigation.…”

Section: Discussionmentioning

confidence: 78%

Spermatozoan numbers and characteristics of associated organs in male white-tailed deer during the breeding season

2003

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2003. Spermatozoan numbers and characteristics of associated organs in male white-tailed deer during the breeding season. Acta Theriologica 48: 123-130.Short-term changes in testicular spermatozoa, testes weight, testes length, epididymes weight, epididymal spermatozoa, and body weight of adult and yearling male white-tailed deer Odocoileus virginianus (Zimmermann, 1780) were examined over a 9-week period that included the peak of the breeding season in South Carolina. Mean values for all characteristics were significantly greater in adults compared to yearlings. Values for reproductive characteristics tended to be highest during the last week in October or the first week in November and decreased over the course of the investigation. Body weight of adults decreased from late October through early December, whereas body weight of yearlings fluctuated only slightly throughout the 9-week period. Significant correlations were observed among all reproductive characteristics and body weight was highly correlated with all characteristics except testicular spermatozoa. Values for reproductive characteristics differed significantly between the right and left sides of the reproductive tracts. Results demonstrate the occurrence of short-term changes in reproductive capabilities of white-tailed deer that are relevant for the development of management strategies for this species.

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Frequency distribution of conception dates in a white-tailed deer herd

Cited by 10 publications

References 21 publications

Determination of time of conception of fallow deer in a Hungarian free range habitat

Determination of time of conception of fallow deer in a Hungarian free range habitat

Spermatozoan numbers and testicular characteristics of male white-tailed deer fawns during the mating season

Spermatozoan numbers and characteristics of associated organs in male white-tailed deer during the breeding season

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