dc.contributor.author | Louie, K. | |
dc.contributor.author | Boom, C. J. | |
dc.contributor.author | Dynes, Robyn A. | |
dc.contributor.author | Mackay, A. D. | |
dc.date.accessioned | 2012-05-25T03:25:33Z | |
dc.date.available | 2012-05-25T03:25:33Z | |
dc.date.issued | 2007 | |
dc.identifier.citation | Louie, K., Boom, C. J., Dynes, R. A. & Mackay, A. D. (2007). Modelling the effect of nematode parasites on the liveweight gain of lambs grazing alternately with cattle. Proceedings of the New Zealand Grassland Association, 69, 259–264. | en |
dc.identifier.uri | https://hdl.handle.net/10182/4496 | |
dc.description | Paper presented at the 69th New Zealand Grassland Association Conference, 13-15 November 2007, Wairakei. | en |
dc.description.abstract | A dynamic model for nematode parasites in lambs
which links their adult parasite burden with liveweight
gain was extended to investigate alternate grazing with
cattle to provide relatively larval-free pasture for
finishing lambs. Liveweight performance of weaned
lambs was tracked fortnightly under rotational grazing
using three cattle:sheep ratios, with three initial parasite
burdens and two initial infective larval densities on
pasture. Lambs were removed from grazing at 37 kg or
if they failed to gain weight during the preceding
fortnight. An 80%:20% cattle:sheep ratio reduced larval
pasture contamination by 75% but did not affect
parasitic burden and total lamb liveweight gain
compared with an all-lamb treatment. For low and
moderate initial parasitic burdens in the 80%:20%
cattle:sheep ratio, 25% of lambs reached 37 kg and
100% gained weight until week 18. This simulation
indicated that in organic lamb finishing systems,
alternate grazing with cattle provides substantial benefit
but only when the initial parasite burden was low or
moderate. | en |
dc.description.sponsorship | This work was funded under FRST contract
C10X0236 “Natural and Organic”. | en |
dc.language.iso | en | en |
dc.publisher | New Zealand Grassland Association. | en |
dc.relation | Available at www.grassland.org.nz | en |
dc.relation.uri | http://www.grassland.org.nz/viewpublication.php?pubID=292 | en |
dc.rights | Copyright © The Authors and New Zealand Grassland Association. | en |
dc.subject | modelling | en |
dc.subject | parasites | en |
dc.subject | liveweight gain | en |
dc.subject | alternate grazing | en |
dc.subject | lambs | en |
dc.title | Modelling the effect of nematode parasites on the liveweight gain of lambs grazing alternately with cattle | en |
dc.type | Conference Contribution - Published | en |
lu.contributor.unit | Department of Agricultural Sciences | en |
dc.subject.anzsrc | 070202 Animal Growth and Development | en |
dc.subject.anzsrc | 070205 Animal Protection (Pests and Pathogens) | en |
dc.subject.anzsrc | 070105 Agricultural Systems Analysis and Modelling | en |
lu.subtype | Conference Paper | |