You are here: Home / Journal Articles / A note on separation from one or more lamb(s) in Merino lines divergently selected for ewe multiple rearing ability / About

A note on separation from one or more lamb(s) in Merino lines divergently selected for ewe multiple rearing ability

By S. W. P. Cloete, A. J. Scholtz, J. M. T. Hoope

View Link (HTM)

Licensed under

Category Journal Articles
Abstract

During 1993-95, post parturient behaviour was studied in 370 Merino ewes, 2-6 years of age, from 2 lines divergently selected for multiple rearing ability kept at the Elsenburg Development Institute. Since 1986, high line ram and ewe replacements had been selected from dams that reared >1 lamb per mating, based on performance after 2 lambings. Progeny of ewes that reared fewer than 1 lamb per mating were selected for the low line. Permanent separation of the ewe from her lamb(s) was recorded in a higher proportion of primiparous ewes compared with multiparous ewes (0.144 and 0.073 respectively; P = 0.06) and in a higher proportion of ewes caring for multiple lambs compared with those caring for singles (0.147 and 0.034 respectively; P = 0.01). Ewes caring for multiple lambs remained at their parturition sites for longer periods than ewes caring for singles (7.81+or-0.49 and 6.66+or-0.38 h respectively; P = 0.05). The proportion of ewes separated from one or more lamb(s) was similar in the high and low lines (0.090 and 0.096). The proportion of primiparous high line ewes caring for a viable single lamb and getting separated from it was lower (P = 0.075) than in low line contemporaries (0.023 and 0.143). A similar trend was recorded in primiparous high line ewes caring for multiple lambs (0.292 and 1.000 respectively; P = 0.111). Interference with or by other ewes was more likely to result in separation of one or more lamb(s) in high line ewes than in low line ewes (0.500 and 0.167; P = 0.074).

Date 1998
Publication Title Applied Animal Behaviour Science
Volume 58
Issue 1/2
Pages 189-195
ISBN/ISSN 0168-1591
Language English
Author Address Elsenburg Agricultural Development Institute, Private Bag X1, Elsenburg 7607, South Africa.
Cite this work

Researchers should cite this work as follows:

Tags
  1. Animal behavior
  2. Animal reproduction
  3. Breeding
  4. Interference
  5. Lambs
  6. Lines
  7. Litters
  8. Mammals
  9. Maternal behavior
  10. parity
  11. peer-reviewed
  12. Selection
  13. separation
  14. Sheep
  15. Wool
Badges
  1. peer-reviewed