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Fish Mass Length Condition Term Tool

Evaluate an explicitly supplied mass/length-power index; exponent, scale and unit convention are caller-defined, without biological thresholds.

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Description

Multiply nonnegative mass by positive suppliedScale and divide by positive length raised to suppliedExponent.

Fish morphometrics relate lengths, masses, ratios, and geometric components under stated measurement conventions. Standard, fork, and total lengths have distinct anatomical bases and should not be treated as interchangeable labels.

Multiply nonnegative mass by positive suppliedScale and divide by positive length raised to suppliedExponent.

When to use this tool

Use Fish Mass Length Condition Term when you need one explicit morphometric component using compatible supplied measurements.

How to use the tool and how it works

  1. Enter mass, length, suppliedExponent, suppliedScale. Use the units and conventions below.
  2. Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
  3. Read conditionTerm. Use the output convention below.

Multiply nonnegative mass by positive suppliedScale and divide by positive length raised to suppliedExponent.1

Input fieldMeaning and unitsAccepted input
massMassRequired. Finite number; minimum 0.
lengthLength on the common unit basis stated above.Required. Finite number; strictly above 0.
suppliedExponentSupplied ExponentRequired. Finite number.
suppliedScaleSupplied ScaleRequired. Finite number; strictly above 0.
Output fieldInterpretationReturned shape
conditionTermCondition TermRequired. Finite number.
json
{
  "input": {
    "mass": 2,
    "length": 2,
    "suppliedExponent": 3,
    "suppliedScale": 100
  },
  "output": {
    "conditionTerm": 25
  }
}

Limitations and assumptions

  • The scale and exponent define the caller's condition term and unit convention; no species reference equation, health classification, or statistical standardization is selected.
  • 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

Check measurement landmarks, species-specific models, and uncertainty before interpreting biological condition or comparing samples.

References

  1. Calculation and input contract: ichthyology/fish-mass-length-condition-term — tool.io

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