Description
Estimate total length using a supplied total-per-fork linear factor.
Fish records distinguish morphometric length definitions, relative image scales, annulus labels, detection times and survey-effort geometry. A supplied conversion factor need not apply across species or sizes. Local labels, ratios and nominal swept areas organize observations without identifying a fish, determining age or estimating abundance.
Estimate total length using a supplied total-per-fork linear factor.
When to use this tool
Use Fish Fork Total Length Source Factor when you already have forkLength, suppliedTotalPerForkFactor, source and need to estimate total length using a supplied total-per-fork linear factor.
How to use the tool and how it works
- Enter forkLength, suppliedTotalPerForkFactor, source. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read estimatedTotalLength, sourceLabel. Use the output convention below.
Require forkLength>=0, factor>0 and source nonempty; multiply fork length by factor and preserve the source label.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| forkLength | Fork Length | Required. Finite number; minimum 0. |
| suppliedTotalPerForkFactor | Positive total-length/fork-length factor; no species model is fitted or validated. | Required. Finite number; strictly above 0. |
| source | Source | Required. Text; minimum UTF-16 length 1; maximum UTF-16 length 8192. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| estimatedTotalLength | Estimated Total Length | Required. Finite number. |
| sourceLabel | Source Label | Required. Text; maximum UTF-16 length 8192. |
{
"input": {
"forkLength": 20,
"suppliedTotalPerForkFactor": 1.1,
"source": "Study A"
},
"output": {
"estimatedTotalLength": 22,
"sourceLabel": "Study A"
}
}Limitations and assumptions
- The source and factor are supplied, not validated as species- or size-appropriate; no actual total length or allometric relation is established.
- 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
Inspect original specimens, images, reference definitions and survey logs when verifying observations. Use a complete species-appropriate measurement or population method for age, abundance or condition questions; local scales and effort terms preserve only their stated basis.
References
Similar or alternative tools
- Fish Length Frequency Bin
Check a fish-length record against a supplied bin with optional upper inclusion.
- Fish Maturity Stage Source Key
Preserve explicit fish maturity-stage and source metadata.