@article {3672,
	title = {Faecal avoidance in Romney sheep lines selected for resistance or resilience to gastro-intestinal nematodes},
	journal = {New Zealand Journal of Animal Science and Production},
	volume = {78},
	year = {2018},
	month = {07/2018},
	pages = {100-104},
	address = {Lincoln},
	abstract = {Faecal avoidance was assessed in Romney lambs from lines selected for resistance or resilience to gastro-intestinal nematode
parasites. Ten lambs from each selection line that were maintained in separate farmlets and naturally exposed to parasites were
assessed on distance grazed from either a mud-clay or faecal ball at 130, 150, 180 and 210 days-of-age. Resistant line animals
maintained lower faecal-egg counts compared with resilient lambs, viz. 25.6 c.f. 771.0 eggs per gram of faeces (P<0.001) and
greater Trichostrongylus colubriformis-specific immunoglobulin G absorbance (P=0.005) indicating differences between selection
lines in parasite loading and immunlogical status. Grazing distance from the object was greatest for faecal ball, viz. 11.53 {\textpm} 1.14
cm compared with mud-clay ball, viz. 4.19 {\textpm} 1.00 cm (P<0.001) and decreased with time (P<0.001). Grazing distance tended to be
greater for resilient, viz. 8.63 {\textpm} 1.14 cm than resistant, viz. 7.09 {\textpm} 0.99 cm (P=0.09) but there was no interaction between selection
line and ball type (P=0.709) indicating similar levels of faecal-specific aversion between the selection lines. These results suggest
that the lesser infection levels in resistant-line animals when grazing is unlikely to be due to reduced exposure to infective larvae
as a consequence of greater faecal avoidance.},
	issn = {1176-5283},
	author = {Hamie JC and Logan CM and McAnulty RW and Greer AW}
}
