Elephant Database
African Elephant Specialist Group

Guinea Bissau
2016 African Elephant Status Report

All Years for Guinea Bissau: 201620132007200219981995

Summary Totals for Guinea Bissau

Estimates from SurveysGuesses% Known and
Possible Range
Area (km2)
Survey categoryEstimate± 95% CLFromTo
Degraded Data77100.01,346
Totals 20150077  
Totals 200600720  
Assessed Range100.01,346
Unassessed Range0.00
Total Range1001,346

Summary Totals for Guinea Bissau

Data Category Definite Probable Possible Speculative
Other Guesses0007
Totals 20150007
Totals 200600713

Interpretation of Changes in Estimates from Previous Report

 Estimates from SurveysGuessesArea
Cause of Change Estimate ± 95% CL From To% Known and PossibleTotal
Population Lost00000.00
Data Degraded000-130.00

Interpretation of Changes in Estimates from Previous Report

Cause of Change Definite Probable Possible Speculative
Population Lost0000

Interpretation of Changes in Estimates from Previous Report (2007 scaling)

Cause of Change Definite Probable Possible Speculative
Population Lost0000

Guinea Bissau: Elephant Estimates

Cause ofSurvey Details2 Number of Elephants Area Map Location
Input ZoneChange1TypeReliab.YearEstimate95% C.L. SourcePFS3 (km²) Lon. Lat.
+ Binasse AreaPLOE20040Brugière, et al., 20061330 13.8W 11.8N
PLOE20040Brugière, et al., 2006330 13.8W 11.8N
+ Corubal Dulombi Area-OE20047 13*Brugière, et al., 200611,342 14.7W 11.6N
-OE20047 13*Brugière, et al., 20061,342 14.7W 11.6N

* 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.

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

IUCNSpecies Survival Commission

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