2007 Continental Totals for Africa

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

2007 Summary Totals for Africa

Data Category	Definite	Probable	Possible	Speculative
Aerial or Ground Total Counts	52,320	0	0	0
Direct Sample Counts and Reliable Dung Counts	416,703	36,566	36,566	0
Other Dung Counts	601	46,138	8,788	0
Informed Guesses	2,645	0	38,980	6,148
Other Guesses	0	0	0	44,216
Totals 2006	472,269	82,704	84,334	50,364

Interpretation of Changes in Estimates from Previous Report

Cause of Change	Definite	Probable	Possible	Speculative
Repeat Survey	+53,417	+5,897	+7,763	-617
New Population	+4,125	+857	+3,602	+1,480
Different Technique	+10,663	+24,031	+2,693	-7,048
Different Area	+24,409	-2,631	-2,300	0
New Guess	-6,501	-1,283	-9,807	-4,999
New Analysis	-6,780	-700	-11,127	-44,885
Population Lost	0	0	-63	-171
Data Degraded	-9,131	-2,490	-6,241	+7,297
Totals	+70,202	+23,680	-15,479	-48,943

Area of Range Covered by Each Data Category (km²)

Data Category	Known Range	Possible Range	Total Range
Aerial or Ground Total Counts	170,682	12,334	183,016
Direct Sample Counts and Reliable Dung Counts	678,335	36,939	715,274
Other Dung Counts	83,328	24	83,352
Informed Guesses	172,379	30,022	202,400
Other Guesses	411,597	113,026	524,623
Unassessed Range	597,909	1,029,252	1,627,161
Totals	2,114,230	1,221,597	3,335,827

Elephant Estimates

Region	Definite	Probable	Possible	Speculative	Range Area (km²)	% of Continental Range	% of Range Assessed	IQI¹	PFS²
Central Africa	10,383	48,936	43,098	34,129	975,079	29	52	.22	1
Eastern Africa	137,485	29,043	35,124	3,543	880,063	26	45	.36	2
Southern Africa	297,718	23,186	24,734	9,753	1,305,140	39	53	.48	1
West Africa	7,487	735	1,129	2,939	175,545	5	66	.44	3
Totals	472,269	82,704	84,334	50,364	3,335,827	100	51	.41

¹IQI: Information Quality Index: This index quantifies overall data quality at the regional level based on the precision of estimates and the proportion of assessed elephant range (i.e. range for which estimates are available). The IQI ranges from zero (no reliable information) to one (perfect information).

²PFS: 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.

***Note that totals for the Definite, Probable, and Possible categories are derived by pooling the variances of individual estimates, as described at http://www.elephantdatabase.org/reliability. As a result, totals do not necessarily match the simple sum of the entries within a given category.