Data Category | Definite | Probable | Possible | Speculative |
---|---|---|---|---|
Aerial or Ground Total Counts | 1,750 | 0 | 0 | 0 |
Informed Guesses, Undocumented Aerial or Dung Surveys and GIS Extrapolations | 0 | 0 | 2,640 | 0 |
Other Guesses and Other Extrapolations | 0 | 0 | 0 | 4,894 |
Total | 1,750 | 0 | 2,640 | 4,894 |
No changes between current and previous report.
Survey Details2 | Number of Elephants | Area | Map Location | |||||||
---|---|---|---|---|---|---|---|---|---|---|
Input Zone | Type | Reliab. | Year | Estimate | 95% C.L. | Source | PFS3 | (km²) | Lon. | Lat. |
Bamingui-Bangoran Complex | AS3 | E | 1985 | 1,607 | 1,896 | Douglas-Hamilton et al., 1985 | 2 | 32,000 | 20.0E | 7.7N |
Bangassou Forest | DC3 | D | 1989 | 2,640 | Fay & Agnagna, 1991a; Fay, 1991 | 2 | 5,550 | 23.3E | 5.2N | |
Dzanga-Sangha Reserve | IR1 | A | 1993 | 1,750 | Turkalo, Quest. Reply, 1993; Turkalo & Fay, 1995 | 2 | 3,293 | 16.2E | 3.0N | |
Manovo-Gounda-Saint Floris Complex | AS3 | E | 1985 | 2,701 | 1,837 | Douglas-Hamilton et al., 1985 | 2 | 32,400 | 21.6E | 9.2N |
Manovo Intensive | AS2 | E | 1985 | 444 | 319 | Douglas-Hamilton et al., 1985 | 2 | 4,800 | 21.2E | 8.7N |
Rhino Sector | AS2 | E | 1985 | 51 | 48 | Douglas-Hamilton et al., 1985 | 3 | 2,700 | 20.9E | 7.4N |
Vassako-Bolo | AS2 | E | 1985 | 91 | 120 | Douglas-Hamilton et al., 1985 | 3 | 2,500 | 19.8E | 8.0N |
* 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.