Description
Multiply nonnegative netArea by hours and functioningFraction in [0, 1] for areaHours.
Fisheries sampling effort can be expressed as net-hours, area-hours, or another declared survey unit. Exclusions and partial operation change the counted effort without automatically correcting catchability or sample bias.
Multiply nonnegative netArea by hours and functioningFraction in [0, 1] for areaHours.
When to use this tool
Use Net Effort Time Area Term when you need a reproducible effort component under a supplied survey convention.
How to use the tool and how it works
- Enter netArea, hours, functioningFraction. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read areaHours. Use the output convention below.
Multiply nonnegative netArea by hours and functioningFraction in [0, 1] for areaHours.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| netArea | Net Area | Required. Finite number; minimum 0. |
| hours | Hours | Required. Finite number; minimum 0. |
| functioningFraction | Functioning Fraction | Required. Finite number; minimum 0; maximum 1. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| areaHours | Area Hours | Required. Finite number. |
{
"input": {
"netArea": 10,
"hours": 3,
"functioningFraction": 0.8
},
"output": {
"areaHours": 24
}
}Limitations and assumptions
- Output is area times hours on the input area basis; it describes supplied effective effort without catchability, selectivity, or habitat coverage correction.
- 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 the complete survey design and suitable detection or catchability methods when estimating population abundance.
References
Similar or alternative tools
- Gillnet Catch Per Area Hour Term
Multiply positive netLength, netHeight, hours, and activeFraction in (0, 1] for areaTimeEffort.
- Survey Net Effort Unit Factor
Multiply nonnegative integer netCount by activeHours, subtract unavailableNetHours, and divide netHours by positive suppliedHoursPerEffortUnit.