Elephant Database
African Elephant Specialist Group

Dung Count (Line Transects) Stratum/Block

Congo
Phenotype: Forest (based on geographical location)
Data contributed by peter.mwangi@iucn.org, last updated 11/05/2012
Report restricted by data provider
17753 km²
Multiple strata reported as aggregate
Show aggregates

Ngombe FMU and Ntokou Forest

Internal name:
Stratum/block area (km²): 17753
Population estimate: 15109
Variance:
Standard error:
Value of t used to calculate 95% confidence interval:
Degrees of freedom:
95% confidence interval: 6620.5
95% lower confidence limit: 8488
95% upper confidence limit: 21729
Check if no estimate of precision available: false
Asymmetric lower confidence interval: 9876
Asymmetric upper confidence interval: 23117
Number of transects covered: 74
Total length of transects covered (in km):
Effective strip width:
Number of observations (encounters): 624
How were distances to observations estimated?: Using instruments
Number of elephants seen: 0
Number of dungpile on which the decay estimate is based:
Was dung decay rate measured on site, and if so, how?: Decay rate NOT measured on site
Dung decay estimate used (days): 90.0
Site where decay rate was measured:
Date (year) in which decay rate was measured:
Dung decay rate - bibliographical reference: White and Edwards 2000a
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:
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: 0
Variance:
Standard error:
Value of t:
Degrees of freedom:
95% Confidence interval: 0.37
95% lower confidence limit: 0.47
95% upper confidence limit: 1.21
Asymmetric upper confidence interval: 1
Asymmetric lower confidence interval: 0
Check if no estimate of precision available: false
Dung encounter rate: 4.0
IUCNSpecies Survival Commission

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