Estrous synchronization and the male effect in captive muskoxen

descriptionPublicationkeyboard_double_arrow_right Article 01 Dec 2007 English Publisher:Canadian Science PublishingJournal:Canadian Journal of Animal Science, volume 87, pages 535-538 (issn: 0008-3984, eissn: 1918-1825,

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Authors: J. E. Rowell; M. C. Sousa; M. P. Shipka;

doi: 10.4141/cjas06036

Estrous synchronization and the male effect in captive muskoxen

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Abstract

Bovine CIDR were used for 11 d to synchronize estrus in 18 farmed muskoxen. Nine muskoxen went into harem for 1 wk (BRED) following CIDR removal and nine animals served as treated, non-mated controls (CTL). Progestin treatment prevented short estrous cycles (100% BRED; 88.9% CTL). The interval from CIDR removal to CL formation was 7.2 d (BRED) and 11.6 d (CTL) and fertility rate at the estrus following treatment was 88.9% (BRED). The use of bovine CIDR to synchronize estrus reduced the harem period to 1 wk and resulted in synchronized calving (7 d) following a mean gestation of 246 d. Key words: CIDR, Estrous synchronization, male effect, muskoxen, Ovibos moschatus

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University of Alaska Fairbanks
United States

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