Table 2. Herd attributes and pathogen detection status for 22 bighorn sheep populations.
| Mycoplasma ovipneumoniae | Mannheimia haemolytica | Mannheimia species | Bibersteinia trehalosi | Pasteurella multocida | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| + | -4 | + | -4 | + | -4 | + | -4 | + | -4 | |
| # Populations | 17 | 5 | 15 | 4 | 18 | — | 10 | 10 | 15 | 2 |
| Previous all-age respiratory disease epizootics | 65% (11/17) | 0% (0/5) | 53% (8/15) | 50% (2/4) | 44% (8/18) | — | 60% (6/10) | 30% (3/10) | 66% (9/15) | 0% (0/2) |
| Meets abundance objective1 | 53% (9/17) | 60% (3/5) | 67% (10/15) | 50% (2/4) | 61% (11/18) | — | 60% (6/10) | 50% (5/10) | 66% (9/15) | 50% (1/2) |
| Adequate recruitment2 | 66% (10/15) | 100% (4/4) | 93% (13/14) | 75% (3/4) | 82% (14/17) | — | 90% (9/10) | 75% (6/8) | 87% (13/15) | 50% (1/2) |
| Trend stable or growing3 | 56% (9/16) | 75% (3/4) | 71% (10/14) | 50% (2/4) | 59% (10/17) | — | 60% (6/10) | 66% (6/9) | 60% (9/15) | 50% (1/2) |
1. Meeting abundance objective defined as ≥ 80% of listed population objective for Wyoming populations and ≥ 90% of listed population objective for Montana populations pursuant to state and population-specific management goals. Targhee population objectives are no longer defined according to population size or counts.
2. Adequate recruitment defined as average winter lamb:ewe ratios > 0.20 which has been established as a criteria for healthy populations [40].
3. Based on managing biologists assessment of ten-year population trend.
4 Only populations where estimated probability of presence for undetected pathogens was <10% are shown