| gastrointestinal nematode species burdens and host mortality in a feral sheep population. | every few years a large proportion of the feral sheep on hirta, st kilda die due to food shortage. the effects of malnutrition are exacerbated by gastrointestinal nematodes. as found in sheep flocks in mainland britain, teladorsagia circumcincta has long been considered the predominant and most pathogenic nematode species in all age classes of soay sheep. previous research indicated that intensity of this species showed a negative association with host age and comprised 75% of the entire gastroi ... | 2006 | 16817995 |
| variation among faecal egg counts following natural nematode infection in scottish blackface lambs. | faecal egg counts were examined in 2 flocks of naturally infected scottish blackface sheep in southern and central scotland. the distribution of mean counts was right skewed and similar to a gamma distribution. the counts varied with month, with mean counts rising from may to july, then falling but rising again in october, although data within each year did not always show such a clear pattern. there was no significant difference in mean egg count between the 2 farms examined. the distribution o ... | 2006 | 16209724 |
| the response of breeding doses to nematodiasis: segregation into "responders" and "non-responders". | responder and non-responder does were identified from a flock of 95 scottish cashmere 2-6 year-old does exposed to natural nematode infection over a 12-month period. every 5 weeks, the does were faecal sampled for worm-egg counts prior to anthelmintic treatment. responsive and non-responsive individuals were identified on the basis of their cumulative faecal egg count (fec) rankings: the 8 lowest and 8 highest rankings were deemed to be responders and non-responders, respectively. retrospective ... | 1996 | 9024875 |