Elephant Database
African Elephant Specialist Group

Dung Count (Line Transects) Stratum/Block

Gabon
Phenotype: Forest (based on geographical location)
Data contributed by peter.mwangi@iucn.org, last updated 01/03/2012
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3000 km²
No strata
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Lopé-Waka Corridor

Internal name:
Stratum/block area (km²): 3000
Population estimate: 1343
Variance: 157560.3915
Standard error:
Value of t used to calculate 95% confidence interval:
Degrees of freedom:
95% confidence interval: 778.0
95% lower confidence limit: 565
95% upper confidence limit: 2121
Check if no estimate of precision available: false
Asymmetric lower confidence interval: 569
Asymmetric upper confidence interval: 987
Number of transects covered: 24
Total length of transects covered (in km): 59.0
Effective strip width:
Number of observations (encounters): 181
How were distances to observations estimated?: By eye
Number of elephants seen: 0
Number of dungpile on which the decay estimate is based: 159
Was dung decay rate measured on site, and if so, how?: Retrospectively
Dung decay estimate used (days): 71.0
Site where decay rate was measured: Mature forest area of northern Lope
Date (year) in which decay rate was measured: 2006
Dung decay rate - bibliographical reference: L. Momont pers. communication
Variance:
Standard error:
Value of t:
Degrees of freedom:
95% Confidence interval:
95% lower confidence limit:
95% upper confidence limit:
Check if no estimate of precision available: true
Was defecation rate measured on-site?: false
Estimate of defecation rate used (days): 19.0
Site where the defecation rate was measured: Central African forests
Defecation rate - bibliographical reference: MIKE, 2005
Variance:
Standard error:
Value of t:
Degrees of freedom:
95% Confidence interval:
95% lower confidence limit:
95% upper confidence limit:
Check if no estimate of precision available: true
Estimate of dung density: 633
Variance:
Standard error:
Value of t:
Degrees of freedom:
95% Confidence interval: 279.5
95% lower confidence limit: 353.5
95% upper confidence limit: 912.5
Asymmetric upper confidence interval: 338
Asymmetric lower confidence interval: 221
Check if no estimate of precision available: false
Dung encounter rate: 3.0
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