Description
effectiveHours = plannedHours-failedHours; rate = catchCount/effectiveHours; fullEffortEquivalent = rate*plannedHours.
Insect sampling effort can be expressed as trap-nights, active hours, flower-minutes, distance or area-times-beats. Normalizing catch by effort makes its denominator explicit, but does not automatically estimate abundance or equalize detection.
effectiveHours = plannedHours-failedHours; rate = catchCount/effectiveHours; fullEffortEquivalent = rate*plannedHours.
When to use this tool
Use Insect Trap Effort Failure Adjustment when normalizing a supplied catch, visit count or sampling exposure.
How to use the tool and how it works
- Enter plannedHours, failedHours, catchCount. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read effectiveHours, rate, fullEffortEquivalent. Use the output convention below.
Require nonnegative failedHours, plannedHours > failedHours and nonnegative whole catchCount. effectiveHours = plannedHours-failedHours; rate = catchCount/effectiveHours; fullEffortEquivalent = rate*plannedHours.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| plannedHours | Planned Hours Unit: h. | Required. Finite number. |
| failedHours | Failed Hours Unit: h. | Required. Finite number; minimum 0. |
| catchCount | Catch Count | Required. Safe integer; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| effectiveHours | Effective Hours Unit: h. | Required. Finite number. |
| rate | Supplied rate on the declared period or quantity basis; percentage conversion is not inferred. | Required. Finite number. |
| fullEffortEquivalent | Full Effort Equivalent | Required. Finite number. |
{
"input": {
"plannedHours": 24,
"failedHours": 6,
"catchCount": 30
},
"output": {
"effectiveHours": 18,
"rate": 1.6666666666666667,
"fullEffortEquivalent": 40
}
}Limitations and assumptions
- The full-effort equivalent extrapolates a constant observed rate and may be fractional. Missing effort is not imputed from ecological conditions or independently verified failure records.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use a suitable sampling and detection model for abundance inference, and review actual deployments and conditions before aggregating effort.
References
Similar or alternative tools
- Insect Trap Windward Leeward Paired Gap
Compute each catch/hour rate and rateDifference = windwardRate-leewardRate.
- Insect Survey Beat Sheet Area Term
sheetArea = width*length; areaBeatEffort = sheetArea*beats; catchPerAreaBeat = count/areaBeatEffort.