Description
Compute each catch/hour rate and rateDifference = windwardRate-leewardRate.
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.
Compute each catch/hour rate and rateDifference = windwardRate-leewardRate.
When to use this tool
Use Insect Trap Windward Leeward Paired Gap when normalizing a supplied catch, visit count or sampling exposure.
How to use the tool and how it works
- Enter windwardCatch, leewardCatch, windwardHours, leewardHours. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read windwardRate, leewardRate, rateDifference. Use the output convention below.
Require nonnegative whole windwardCatch and leewardCatch and positive exposure hours. Compute each catch/hour rate and rateDifference = windwardRate-leewardRate.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| windwardCatch | Windward Catch | Required. Safe integer; minimum 0. |
| leewardCatch | Leeward Catch | Required. Safe integer; minimum 0. |
| windwardHours | Windward Hours Unit: h. | Required. Finite number; strictly above 0. |
| leewardHours | Leeward Hours Unit: h. | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| windwardRate | Windward Rate | Required. Finite number. |
| leewardRate | Leeward Rate | Required. Finite number. |
| rateDifference | Rate Difference | Required. Finite number. |
{
"input": {
"windwardCatch": 30,
"leewardCatch": 20,
"windwardHours": 10,
"leewardHours": 10
},
"output": {
"windwardRate": 3,
"leewardRate": 2,
"rateDifference": 1
}
}Limitations and assumptions
- This is a signed descriptive contrast with unequal effort normalization, not a paired significance test or adjustment for wind, location and trap-detection differences.
- 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 Effort Failure Adjustment
effectiveHours = plannedHours-failedHours; rate = catchCount/effectiveHours; fullEffortEquivalent = rate*plannedHours.
- Insect Survey Beat Sheet Area Term
sheetArea = width*length; areaBeatEffort = sheetArea*beats; catchPerAreaBeat = count/areaBeatEffort.