Island Dwarfism Size Reduction Percent Calculator
SIGNEDislandsizeCHANGEpercent100(island/mainland−1),negative dwarfismpositivegigantism retained,matchedmetricnot selectancestor/taxon. Actual independently identified specimens,matched units/taxon/cohort/source/edition/calibration and model applicability external;not individual identity,causation,diagnosis,absolute age certainty or validated forecast.
Description
A size comparison between matched island and mainland populations can be expressed as a signed percentage change.
A size comparison between matched island and mainland populations can be expressed as a signed percentage change.1
Negative values indicate a smaller island metric and positive values a larger one.
When to use Island Dwarfism Size Reduction Percent Calculator
Use this tool to apply the stated island dwarfism size reduction percent calculator operation with an explicit input and unit basis.
How to use Island Dwarfism Size Reduction Percent Calculator and how it works
- Establish the measurement basis and units described above.
- Enter actualIslandPopulationSizeMetric, callerMatchedMainlandReferenceSizeMetric and run the tool.
- Read result.value using the output meanings below.
- If input is rejected, correct the stated type, range, ordering or alignment issue and rerun; review successful results under the declared convention.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualIslandPopulationSizeMetric | Island population size metric, on the basis specified in the algorithm. | number | required; finite; nonnegative; further conditions in the algorithm |
| callerMatchedMainlandReferenceSizeMetric | Matched mainland reference size metric, on the basis specified in the algorithm. | number | required; finite; strictly positive; further conditions in the algorithm |
Require nonnegative island size and positive matched mainland reference using the same metric. Return 100 times island/reference minus one.
signed percent change = 100 × (island/mainland − 1) Apply the declared units, ordering and branch conditions.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the declared output fields. | object |
| result.value | Signed island/mainland percentage change; negative means smaller. | number |
{
"input": {
"actualIslandPopulationSizeMetric": 8,
"callerMatchedMainlandReferenceSizeMetric": 10
},
"output": {
"result": {
"value": -19.999999999999996
}
}
}Limitations and assumptions
The output applies the declared operation to the values you supply. Establish the measurement basis, units, coefficients and any caller-selected rules before interpreting it. The tool does not independently collect or verify observations or decide whether a model or reference applies.
Supply explicit required fields with the documented types and dense aligned arrays. Unknown fields, wrong types and nonfinite numbers are rejected. Branch-specific constraints are explained above. A successful false boolean, negative signed difference, empty slice or unresolved tie is distinct from an input error. Very large inputs or outputs may be rejected by shared resource limits.
Alternative or Complementary methods
For a related operation, use Encephalization Quotient Fossil Calculator. Fossil encephalization quotient compares observed endocranial volume with an independently applicable expected volume.
For a related operation, use Sexual Dimorphism Canine Ratio Calculator. Comparing mean canine sizes describes a difference between independently established specimen groups.
References
Similar or alternative tools
- Encephalization Quotient Fossil Calculator
Fossil encephalization quotient compares observed endocranial volume with an independently applicable expected volume.
- Sexual Dimorphism Canine Ratio Calculator
Comparing mean canine sizes describes a difference between independently established specimen groups.