Amphibian Transect Distance Effort Term Tool

Description

Return distance × width, observations/distance, and observations/duration.

Wildlife survey effort can use observer-hours, trap-nights, observation windows, or repeated visits. Equivalent effort applies a declared reporting rule and does not automatically correct detection probability.

Return distance × width, observations/distance, and observations/duration.

When to use this tool

Use Amphibian Transect Distance Effort Term when you need one explicit herpetological survey-effort component.

How to use the tool and how it works

Enter distance, searchedWidth, duration, observations. Use the units and conventions below.
Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
Read searchedArea, encounterPerDistance, observationsPerTime. Use the output convention below.

Require positive distance and duration, nonnegative searchedWidth, and integer observations. Return distance × width, observations/distance, and observations/duration.^[1]

Input field	Meaning and units	Accepted input
distance	Distance	Required. Finite number; strictly above 0.
searchedWidth	Searched Width	Required. Finite number; minimum 0.
duration	Duration	Required. Finite number; strictly above 0.
observations	Observations	Required. Safe integer; minimum 0.

Output field	Interpretation	Returned shape
searchedArea	Searched Area	Required. Finite number.
encounterPerDistance	Encounter Per Distance	Required. Finite number.
observationsPerTime	Observations Per Time	Required. Finite number.

json

{
  "input": {
    "distance": 100,
    "searchedWidth": 2,
    "duration": 30,
    "observations": 15
  },
  "output": {
    "searchedArea": 200,
    "encounterPerDistance": 0.15,
    "observationsPerTime": 0.5
  }
}

Limitations and assumptions

Length and time units determine output units; zero searched width is accepted and counts are not detection-corrected or population estimates.
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

Review the complete survey design, environmental conditions, detection methods, and appropriate wildlife protocols.

References

Calculation and input contract: herpetology/amphibian-transect-distance-effort-term — tool.io

Similar or alternative tools

Herpetofauna Survey Effort Hour Factor
Sum nonnegative observerMinutes and divide by positive minutesPerHour.
Amphibian Survey Support Share
Sum eligible time and time satisfying all flags, then divide or return zero with defined false for no eligible time.