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Scientific Articles

Associations between lamb growth to weaning and dam udder and teat scores

KJ GriffithsSchool of Veterinary Science, Massey University, Palmerston North, New ZealandCorrespondence[email protected]

,

AL RidlerSchool of Veterinary Science, Massey University, Palmerston North, New Zealand

,

CWR ComptonSchool of Veterinary Science, Massey University, Palmerston North, New Zealand

,

RA Corner-ThomasSchool of Agriculture and Environment, Massey University, Palmerston North, New Zealand

http://orcid.org/0000-0002-7398-2653

&

PR KenyonSchool of Agriculture and Environment, Massey University, Palmerston North, New Zealand

http://orcid.org/0000-0003-1131-0736

Figures & data

Table 1. Description of the traits and scores used to assess udder morphology in ewes at different times between mating and weaning. Due to small numbers of ewes in some categories, scores were subsequently combined for analyses.

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Table 2. Number (%) of lambs that survived to weaning in one flock that were born to ewes that were recorded with different scores for udder traits (see ) on four occasions between mating and weaning. Note some ewes did not have all traits recorded on all occasions.

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Table 3. Results of univariate analyses showing the mean (95% CI) growth rate (g/day) between birth and weaning of lambs born to ewes in one flock that were recorded with different scores for udder traits (see ) on four occasions between mating and weaning.

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Table 4. Estimated mean (95% CI) growth rate (g/day) between birth and weaning of lambs that differed in birth rank, lamb rearing rank and sex, from final multivariable models that examined associations between growth rates of lambs and udder traits of ewes recorded on four occasions between mating and weaning.

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Table 5. Results of final multivariable models ^a showing the estimated mean (95% CI) growth rate (g/day) between birth and weaning of lambs born to ewes with different scores for udder traits (see ) recorded on four occasions between mating and weaning.

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