Poorer lifetime growth performance of gilt progeny compared with sow progeny is largely due to weight differences at birth and reduced growth in the preweaning period, and is not improved by progeny segregation after weaning
JR Craig, CL Collins, KL Bunter, JJ Cottrell, FR Dunshea, JR Pluske
JOURNAL OF ANIMAL SCIENCE | OXFORD UNIV PRESS INC | Published : 2017
Gilt progeny (GP) are born and weaned lighter than sow progeny (SP) and have higher rates of mortality. This study aimed to quantify the performance and survival differences between GP and SP throughout the entire production cycle from birth to sale. Furthermore, the study looked at the effects of segregating GP and SP compared with commingling during rearing within common pens. It was hypothesized that GP would be lighter than SP at every age and have lower rates of survival accompanied by higher rates of medication, and that segregating GP and SP would improve the growth and survival of both groups. All progeny born to 109 gilts (parity 1) and 94 sows (parities 2 to 8) were allocated to 4 ..View full abstract
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The authors gratefully acknowledge the technical research teams from Rivalea (Australia) Pty. Ltd. (Corowa, Australia) and The University of Melbourne (Faculty of Veterinary and Agricultural Sciences; Parkville, Australia) for their assistance on this project. This research was funded by Australian Pork Limited (APL; Canberra, Australia), and J. Craig was supported by an Australian Postgraduate Award (PhD) from Murdoch University (Murdoch, Australia).