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 12/07/2013
Report restricted by data provider
1682 km²
No strata
Show aggregates
436
Mayombe Area
1682km²

Mayombe Area

Internal name:
Stratum/block area (km²): 1682
Population estimate: 436
Variance:
Standard error:
Value of t used to calculate 95% confidence interval:
Degrees of freedom:
95% confidence interval:
95% lower confidence limit:
95% upper confidence limit:
Check if no estimate of precision available: true
Asymmetric lower confidence interval: 299
Asymmetric upper confidence interval: 634
Number of transects covered: 36
Total length of transects covered (in km): 78.3
Effective strip width: 1.52
Number of observations (encounters): 156
How were distances to observations estimated?: Using instruments
Number of elephants seen: 0
Number of dungpile on which the decay estimate is based: 57
Was dung decay rate measured on site, and if so, how?: Prospectively
Dung decay estimate used (days): 158.0
Site where decay rate was measured: Conkouati-Douli National Park
Date (year) in which decay rate was measured: 2005
Dung decay rate - bibliographical reference: Vanleeuwe, H. & Probert, J. (2014) Decay Rate of Elephant Dung in Conkouati-Douli National Park, Republic of Congo. Pachyderm, 55, 89-91.
Variance:
Standard error: 3.55
Value of t:
Degrees of freedom:
95% Confidence interval:
95% lower confidence limit:
95% upper confidence limit:
Check if no estimate of precision available: false
Was defecation rate measured on-site?: true
Estimate of defecation rate used (days): 16.0
Site where the defecation rate was measured: Conkouati-Douli National Park,
Defecation rate - bibliographical reference: Vanleeuwe, H. (2010) Ecological Surveys 2005, 2008 and 2010: Large Mammal and Human Impact Distribution and Elephant and Great Ape Densities At Conkouati-Douli National Park, Republic of Congo, Wildlife Conservation Society Congo, Brazzaville, Congo.
Variance:
Standard error: 1.09
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: 654
Variance:
Standard error:
Value of t:
Degrees of freedom:
95% Confidence interval:
95% lower confidence limit:
95% upper confidence limit:
Asymmetric upper confidence interval: 952
Asymmetric lower confidence interval: 450
Check if no estimate of precision available: true
Dung encounter rate: 1.99
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