Fertility and twinning in Canadian reindeer
This study was carried out from 1976 to 1981 on the Mackenzie Delta reindeer herd with the co-operation of the owners, Canadian Reindeer Ltd., Tuktoyaktuk, Northwest Territories. The reproductive organs of 4050 female reindeer (Rangifer tarandus) were collected at slaughter. The pregnancy rates aver...
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| Format: | Article |
| Language: | English |
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Septentrio Academic Publishing
1986-06-01
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| Series: | Rangifer |
| Subjects: | |
| Online Access: | https://septentrio.uit.no/index.php/rangifer/article/view/639 |
| _version_ | 1811333137466130432 |
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| author | G. F. Godkin |
| author_facet | G. F. Godkin |
| author_sort | G. F. Godkin |
| collection | DOAJ |
| description | This study was carried out from 1976 to 1981 on the Mackenzie Delta reindeer herd with the co-operation of the owners, Canadian Reindeer Ltd., Tuktoyaktuk, Northwest Territories. The reproductive organs of 4050 female reindeer (Rangifer tarandus) were collected at slaughter. The pregnancy rates averaged 99.5% of the females examined. In the years 1978 and 1981, 24.7% (713) of the animals were carrying twins, as compared to a twinning rate of 0.4%) observed for the intervening years. Nineteen animals were not pregnant. Of these, 14 were emaciated with no gross pathology* of the reproductive tract. Five females had either a mummified fetus or uterine adhesions preventing a viable pregnancy. Estimated fawn survival rates from birth to June varied from 51.7 to 95.7%. Fawn survival from June to yearlings of June the next year varied from 51 to 86.4% as determined by count at roundup. Increment averaged 15.8% per year after a slaughter of 13.4% of the herd yearly. |
| first_indexed | 2024-04-13T16:47:30Z |
| format | Article |
| id | doaj.art-56cd9dfcf532477ebb52970a2efd9bd8 |
| institution | Directory Open Access Journal |
| issn | 1890-6729 |
| language | English |
| last_indexed | 2024-04-13T16:47:30Z |
| publishDate | 1986-06-01 |
| publisher | Septentrio Academic Publishing |
| record_format | Article |
| series | Rangifer |
| spelling | doaj.art-56cd9dfcf532477ebb52970a2efd9bd82022-12-22T02:39:02ZengSeptentrio Academic PublishingRangifer1890-67291986-06-016210.7557/2.6.2.639594Fertility and twinning in Canadian reindeerG. F. GodkinThis study was carried out from 1976 to 1981 on the Mackenzie Delta reindeer herd with the co-operation of the owners, Canadian Reindeer Ltd., Tuktoyaktuk, Northwest Territories. The reproductive organs of 4050 female reindeer (Rangifer tarandus) were collected at slaughter. The pregnancy rates averaged 99.5% of the females examined. In the years 1978 and 1981, 24.7% (713) of the animals were carrying twins, as compared to a twinning rate of 0.4%) observed for the intervening years. Nineteen animals were not pregnant. Of these, 14 were emaciated with no gross pathology* of the reproductive tract. Five females had either a mummified fetus or uterine adhesions preventing a viable pregnancy. Estimated fawn survival rates from birth to June varied from 51.7 to 95.7%. Fawn survival from June to yearlings of June the next year varied from 51 to 86.4% as determined by count at roundup. Increment averaged 15.8% per year after a slaughter of 13.4% of the herd yearly.https://septentrio.uit.no/index.php/rangifer/article/view/639reindeerpregnancy ratestwinningCanadafawn survivalrecruitment |
| spellingShingle | G. F. Godkin Fertility and twinning in Canadian reindeer Rangifer reindeer pregnancy rates twinning Canada fawn survival recruitment |
| title | Fertility and twinning in Canadian reindeer |
| title_full | Fertility and twinning in Canadian reindeer |
| title_fullStr | Fertility and twinning in Canadian reindeer |
| title_full_unstemmed | Fertility and twinning in Canadian reindeer |
| title_short | Fertility and twinning in Canadian reindeer |
| title_sort | fertility and twinning in canadian reindeer |
| topic | reindeer pregnancy rates twinning Canada fawn survival recruitment |
| url | https://septentrio.uit.no/index.php/rangifer/article/view/639 |
| work_keys_str_mv | AT gfgodkin fertilityandtwinningincanadianreindeer |