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Gestation length in farmed reindeer
1Department of High Latitude Agriculture, School of Natural Resources and Agricultural Sciences, University of Alaska Fairbanks, Fairbanks, Alaska, USA. mpshipka@alaska.edu
Society of Reproduction and Fertility Supplement
|July 16, 2011
Summary
Reindeer gestation length varies significantly, with earlier breeding correlating to longer gestation periods. Understanding this reproductive variability is crucial for intensive reindeer farming practices.
Area of Science:
- Arctic biology
- Animal science
- Reproductive physiology
Background:
- Reindeer (Rangifer tarandus tarundus) are unique arctic cervids vital to Alaska's economy and native populations.
- Traditional free-ranging systems are shifting towards intensive farming, necessitating better reproductive management knowledge.
- Reported reindeer gestation lengths vary widely (198-229 days), indicating a need for further investigation.
Purpose of the Study:
- To review the phenomenon of variable gestation length in reindeer.
- To discuss factors influencing reindeer gestation.
- To identify areas for future research in reindeer reproductive management.
Main Methods:
- Review of existing reindeer research on gestation length.
- Analysis of a switchback study manipulating breeding dates.
- Comparison with data from other reindeer research locations.
Main Results:
- A negative correlation exists between conception date and gestation length in reindeer.
- Early-season breeding was associated with an average increase of 8.5 days in gestation length.
- This variability is consistent with findings in other domestic and non-domestic species.
Conclusions:
- Reindeer gestation length is not fixed and is influenced by factors such as breeding date.
- Further research is needed to fully understand and manage gestation length variability in intensive reindeer farming.
- This understanding is critical for optimizing reproductive success and herd management in reindeer.
