Angola, 2007

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

2007 Summary Totals for Angola

Data Category	Definite	Probable	Possible	Speculative
Aerial or Ground Total Counts	36	0	0	0
Direct Sample Counts and Reliable Dung Counts	782	801	801	0
Informed Guesses	0	0	50	0
Other Guesses	0	0	0	60
Totals 2006	818	801	851	60

Interpretation of Changes in Estimates from Previous Report

Cause of Change	Definite	Probable	Possible	Speculative
Different Technique	+782	+801	+701	0
Totals	+782	+801	+701	0

Area of Range Covered by Each Data Category (km²)

Data Category	Known Range	Possible Range	Total Range
Aerial or Ground Total Counts	468	0	468
Direct Sample Counts and Reliable Dung Counts	10,510	3	10,512
Informed Guesses	0	8,396	8,396
Other Guesses	0	1,502	1,502
Unassessed Range	51,254	334,814	386,068
Totals	62,232	344,714	406,946

Angola : 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.
Bongola Area	-	IG3	E	1992	60		Anstey, 1993	3	1,505	17.6E	17.3S
Cáua Camp	-	IR1	A	2002	36		P. Vaz Pinto, pers. comm., 2003	2	9,500	13.3E	9.3S
Luiana (East) Partial Reserve	DT	AS2	B	2005	1,583	801	Chase & Griffin, 2005b	3	4,032	22.8E	17.4S
Luiana (West) Partial Reserve	DT	AS2	B	2005	0		Chase & Griffin, 2005b	1	4,368	22.3E	17.4S
Quiçama National Park	-	IG3	D	2002	50		P. Vaz Pinto, pers. comm., 2003	2	9,500	13.6E	9.8S

* 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.