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Sexual performance of twin ram lambs and the effect of number and sex of contemporary siblings

By E. O. Price, C. J. Bench, R. E. Borgwardt, M. R. Dally

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Abstract

The objectives of this investigation were to determine the degree of correspondence in the sexual performance of twin male sheep and to compare the sexual performance of ram lambs born co-twin to another male (M-M), co-twin to a female (M-F) and as single (S) offspring. Individual ram lambs (n = 117), including 13 M-M twin sets, were exposed to 4 estrous ewes for 30 min at 7-day intervals over a 4-week period at 8 to 9 months of age. Frequencies of ejaculation (serving capacity) and mounts without ejaculation were recorded. M-M males averaged 2.9 ejaculations and 13.1 mounts per test. Individuals within 9 of the 13 M-M twin sets (69

Date 2000
Publication Title Applied Animal Behaviour Science
Volume 68
Issue 3
Pages 199-205
ISBN/ISSN 0168-1591
DOI 10.1016/S0168-1591(00)00103-9
Language English
Author Address Department of Animal Science University of CA, Davis, CA 95616-8521, USA.
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Tags
  1. Animal behavior
  2. Animal reproduction
  3. Lambs
  4. Litters
  5. Mammals
  6. peer-reviewed
  7. rams
  8. Reproduction
  9. Ruminants
  10. Sexual behavior
  11. sexuality
  12. Sexual practices
  13. Sheep
  14. twins
Badges
  1. peer-reviewed