In collaboration with Murdoch University in Western Australia, NZM is studying how reducing mob size at lambing can lift lamb survival and pay dividends at weaning.
Initial results show that the difference, in twin-bearing ewes, between a mob size of 250 ewes and a mob size of 100 ewes is 16 extra lambs weaned per 100 ewes! To put this in perspective, the average condition score of the ewes would need to be lifted by about 0.5 of a condition score (e.g. from 2.5 to 3.0) to achieve a similar result.
We are collecting lambing data from across New Zealand and Australia, as well as undertaking mob size trials on selected properties. Thank you to those who have already contributed their lambing results. If you would like to be part of the study, contact the NZM Production Science Team.