Niger, 2007

All Years for Niger: 2016 — 2013 — 2007 — 2002 — 1998 — 1995

2007 Summary Totals for Niger

Data Category	Definite	Possible
Aerial or Ground Total Counts	85	0
Informed Guesses	0	17
Totals 2006	85	17

Interpretation of Changes in Estimates from Previous Report

Cause of Change	Definite	Probable	Possible	Speculative
Different Technique	-51	-214	-214	0
New Guess	0	0	+17	-100
Totals	-51	-214	-197	-100

Area of Range Covered by Each Data Category (km²)

Data Category	Known Range	Possible Range	Total Range
Aerial or Ground Total Counts	2,333	0	2,333
Informed Guesses	0	350	350
Totals	2,333	350	2,683

Niger : Elephant Estimates

	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.
Babban Rafi Forest	NG	IG3	D	2005	17		A.M. Issa, pers. comm., 2005	1	430	7.0E	13.1N
W du Niger National Park	DT	AT2	A	2003	85		Bouché et al., 2004b	1	2,294	2.4E	12.3N

* 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.