Table 8.
Loss from replacement on a farm with 500 head of cattle.
| 500-Head Cattle Farm | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Number of test-positive animals | 0 | 1 | 2 | 3 | 5 | 10 | 15 | 20 | 25 | 90 |
| Number of cows on farm | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 | 500 |
| Number of cows to be slaughtered due to TB | 0 | 1 | 2 | 3 | 5 | 10 | 15 | 20 | 25 | 25 |
| Number of productive cows | 500 | 499 | 498 | 497 | 495 | 490 | 485 | 480 | 475 | 410 |
| Production considering fertility and mortality at birth * | 372 | 371 | 370 | 370 | 368 | 364 | 361 | 357 | 353 | 305 |
| Male calves | 186 | 185 | 185 | 185 | 184 | 182 | 180 | 178 | 177 | 152 |
| Female calves | 186 | 186 | 185 | 185 | 184 | 182 | 181 | 179 | 176 | 153 |
| Yearly replacement | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 63 | 63 |
| Increased replacement due to TB | 1 | 2 | 3 | 5 | 10 | 15 | 20 | 25 | 90 | |
| Number of male calves sold | 186 | 185 | 185 | 185 | 184 | 182 | 180 | 178 | 177 | 152 |
| Sale price of male calves | 676.97 | 676.97 | 676.97 | 676.97 | 676.97 | 676.97 | 676.97 | 676.97 | 676.97 | 676.97 |
| Number of female calves sold ** | 123 | 122 | 120 | 119 | 116 | 109 | 103 | 96 | 88 | 0 |
| Sale price of female calves | 458.1 | 458.1 | 458.1 | 458.1 | 458.1 | 458.1 | 458.1 | 458.1 | 458.1 | 458.1 |
| Sales revenue | 182,262.7 | 181,127.7 | 180,211.5 | 179,753.4 | 177,702.1 | 173,141.4 | 169,038.9 | 164,478.3 | 160,136.5 | 102,899.4 |
| Annual reduction in sales revenue *** | −1135.07 | −2051.27 | −2509.37 | −4560.64 | −9121.28 | −13,223.82 | −17,784.46 | −22,126.23 | −79,363.28 | |
| Reduction in sales revenue over two and a half years **** | −2837.67 | −5128.17 | −6273.42 | −11,401.60 | −22,803.20 | −33,059.55 | −44,461.15 | −55,315.58 | −198,408.20 | |
* (Number of productive cows × (9/11.5)) − ((Number of productive cows × 9/11.5) × 0.05); ** Number of female calves sold = Female calves − Yearly replacement − Increased replacement due to TB; *** Annual reduction in sales revenue (for n test-positive animals) = Sales revenue for n test-positive animals scenario − Sales revenue for 0 test-positive animals scenario; **** Reduction in sales revenue over two and a half years = Annual reduction in sales revenue × 2.5 years.