Additional Notes on the Gestation Period of the Woodchuck

Hoyt, Sally F.

doi:10.1093/jmammal/33.3.388-a

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Mean Date Of Parturition1

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1960

1989

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Cited by 6 publications

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“…There were no pregnant females found after April 21 in either year, nor were any young woodchucks ever captured which could have been from a 2nd litter. Hoyt (1952) reported the gestation periods for 3 matings of the same female woodchuck as 31 days, 10 hours; 31 days, 22 hours; and 32 days. Grizzell ( 1955) experimented with artificial insemination and calculated a figure between 31 and 34 days.…”

Section: Mean Date Of Parturitionmentioning

confidence: 99%

Reproductive Cycle and Litter Size of the Woodchuck

Snyder¹,

Christian²

1960

Ecology

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Section: Mean Date Of Parturitionmentioning

confidence: 99%

Reproductive Cycle and Litter Size of the Woodchuck

Snyder¹,

Christian²

1960

Ecology

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Teeth of juvenile woodchucks as seasonal indicators on archaeological sites

Munson

1984

Journal of Archaeological Science

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Hibernation and Circannual Rhythms of Food Consumption in Marmots and Ground Squirrels

Davis¹

1976

The Quarterly Review of Biology

194

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In order to understand better the evolution and adaptive value of hibernation, ecological aspects and experimental studies of closely related hibernators, the Marmotini, are examined. The central hypothesis is that annual changes in the environment integrate three or, perhaps, four physiological processes: torpor, reporduction, consumption of food, and metabolism. Reproduction occurs promptly after emergence from hibernation. For most species, the breeding season is very short. Although the experimental data are rather meager, no variation in external factors has consistently altered the season of reproduction. Consumption of food and change in weight increases until July or September and then decreases. The large members of the Marmotini store their energy as fat, but small species store their energy as seeds and nuts. Experiments to test the hypothesis that some aspect of the supply, such as fat content, might vary seasonally have produced negative results. Complex experiments on the length of the photoperiod on woodchucks and several species of ground squirrels failed to alter the annual cycle of consumption of food. Animals kept in constant conditions showed a cycle of about 11 months, but woodchucks sent tto Australia changed their cycle in two years to match the seasons of the southern hemisphere. Experiments with temperature and torpor and castration did not alter the annual did not alter the rhythm...

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Additional Notes on the Gestation Period of the Woodchuck

Cited by 6 publications

References 0 publications

Reproductive Cycle and Litter Size of the Woodchuck

Reproductive Cycle and Litter Size of the Woodchuck

Teeth of juvenile woodchucks as seasonal indicators on archaeological sites

Hibernation and Circannual Rhythms of Food Consumption in Marmots and Ground Squirrels

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