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. 2023 Jan 5;101:skad002. doi: 10.1093/jas/skad002

Table 7.

Dominant three factors (climatic conditions or management practices) associated with principal components (PC) defining variation in residual body weight (BW), log transformed fecal egg count (FEC). and FAMACHA score (FAM)

PC Significant Variables BW1 FEC FAM
2 Age at which the lambs are out to pasture, active pasture grazed April to June, lambing location −0.86 −0.60
4 Lambs by management groups, castration of males, elevation −0.51
5 Grazing system, lambing season, priority of selection against GIN in replacement ewes −0.50
7 Cover crops grazed October to December, lambing drenching protocol, ewe drenching protocol −0.53 0.54
11 Active pasture grazed April to June, grain fed April to June, castration of males 0.85
13 Lambing season, lamb Mortality due to GIN, age at which the lambs are turned out to pasture 0.49 −0.62
14 Were the sheep grazed with other livestock, elevation, active pasture grazed July to September 0.51
16 Decrease in lamb performance, rainfall, grain fed January to March 0.68
18 October to December actively grazed pasture, thermal min, lambing season −0.55
21 Harvested forage fed April to June, harvested forage fed July to September, deworming rate of replacement animals 0.51
23 Lamb drenching protocol, lambing location, snowfall −0.60
25 Priority of GIN selection in rams, lambs by management groups, grazing system 0.54
27 Were the sheep grazed with other livestock, decrease in lamb performance due to GIN, deworming rate of replacement animals −0.59
29 Cover crops grazed April to June, selection tool utilized against GIN, priority of GIN selection in adult ewes −0.65
31 Grazing system, lamb mortality due to GIN, cover crops grazed April to June −0.50
33 Cover crops grazed January to March, cover crops grazed July to September, castration of males 0.61

1 Correlation coefficients for each PC defining variation in a trait (P < 0.05).