Data Category | Definite | Probable | Possible | Speculative |
---|---|---|---|---|
Direct Sample Counts and Reliable Dung Counts | 109 | 820 | 820 | 0 |
Other Dung Counts | 0 | 869 | 216 | 0 |
Other Guesses | 0 | 0 | 0 | 500 |
Totals 2006 | 109 | 1,689 | 1,036 | 500 |
Cause of Change | Definite | Probable | Possible | Speculative |
---|---|---|---|---|
Different Technique | -2,868 | +1,686 | -264 | -390 |
New Guess | 0 | -1,597 | -1,120 | +500 |
Totals | -2,868 | +89 | -1,384 | +110 |
Data Category | Known Range | Possible Range | Total Range |
---|---|---|---|
Direct Sample Counts and Reliable Dung Counts | 53,378 | 0 | 53,378 |
Other Dung Counts | 4,234 | 0 | 4,234 |
Other Guesses | 11,976 | 0 | 11,976 |
Unassessed Range | 3,865 | 0 | 3,865 |
Totals | 73,453 | 0 | 73,453 |
Cause of | Survey Details2 | Number of Elephants | Area | Map Location | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Input Zone | Change1 | Type | Reliab. | Year | Estimate | 95% C.L. | Source | PFS3 | (km²) | Lon. | Lat. |
Bamingui-Bangoran National Park & Environs | DT | AS2 | B | 2005 | 830 | 807 | Renaud et al., 2005 | 1 | 37,200 | 20.0E | 8.0N |
Bangassou Forest Reserve | NG | OG3 | E | 2004 | 500 | 500* | Blake, 2005 | 1 | 12,011 | 23.3E | 5.2N |
Dzanga-Sangha & Dzanga-Ndoki National Parks | DT | DC1 | C | 2005 | 869 | 216 | Blake, 2005 | 2 | 2,554 | 16.2E | 2.9N |
Manovo Gounda - St Floris National Park | DT | AS2 | B | 2005 | 99 | 146 | Renaud et al., 2005 | 1 | 37,200 | 21.6E | 9.1N |
* Range of informed guess
1Key to Causes of Change (only tracked since 2007): DA: Different Area; DD: Data Degraded; DT: Different Technique; NA: New Analysis; NG: New Guess; NP: New population; PL: Population Lost; RS: Repeat Survey (RS ́ denotes a repeat survey that is not statistically comparable for reasons such as different season); –––: No Change
2Key to Survey Types: AC: Aerial Count, not specified; AS: Aerial Sample Count; AT: Aerial Total Count; DC: Dung Count; EX: Extrapolation from GIS; GD: Genetic Dung Count; GS: Ground Sample Count; GT: Ground Total Count; IG: Informed Guess; IR: Individual Registration; OG: Other Guess. Survey Type is followed by an indicator of survey quality, ranked from 1 to 3 (best to worst). Survey Reliability is keyed A-E (best to worst) as outlined in this table.
3PFS: Priority for Future Surveys, ranked from 1 to 5 (highest to lowest). Based on the precision of estimates and the proportion of national range accounted for by the site in question, PFS is a measure of the importance and urgency for future population surveys. All areas of unassessed range have a priority of 1. See Introduction for details on how the PFS is derived.