Castor Eri Leaf Consumption Cycle

Plan eri castor-leaf demand from stage duration, expected survival and measured per-larva consumption plus leftovers; distinct from observed leaf/cocoon harvest FCR.

Description

Eri leaf demand varies by stage, survival and consumption.

Eri leaf demand varies by stage, survival and consumption. Offered feed must also cover the portion left uneaten.

Plan eri castor-leaf demand from stage duration, expected survival and measured per-larva consumption plus leftovers; distinct from observed leaf/cocoon harvest FCR.

When to use Castor Eri Leaf Consumption Cycle

Use this tool to plan eri castor-leaf demand from stage duration, expected survival and measured per-larva consumption plus leftovers; distinct from observed leaf/cocoon harvest FCR.

Prepare cocoon, larval, leaf or reeling measurements on a consistent batch and moisture basis. Use the declared mass, length and time units.

How to use Castor Eri Leaf Consumption Cycle and understand its results

Prepare cocoon, larval, leaf or reeling measurements on a consistent batch and moisture basis. Use the declared mass, length and time units.
Enter initialEriLarvae, stageDurationDays, stageSurvivalFractions, consumedCastorLeafGramsPerLarvaDay, unconsumedOfferedLeafFractions using the field table and calculation rules, then run the tool.
Read expectedConsumedLeafKgByStage, requiredOfferedLeafKgByStage, totalRequiredOfferedLeafKg. The explanation below defines the units, signs, ordering and any flags or placeholder values.
If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.

Input field	Meaning	Value type; see rules below	Requirement
initialEriLarvae	Initial eri larvae	integer	Required
stageDurationDays	Stage duration days	list of number	Required
stageSurvivalFractions	Stage survival fractions	list of number	Required
consumedCastorLeafGramsPerLarvaDay	Consumed castor leaf grams per larva day	list of number	Required
unconsumedOfferedLeafFractions	Unconsumed offered leaf fractions	list of number	Required

Align nonnegative durations and consumption, nonincreasing survival fractions in [0,1] and uneaten fractions in [0,1). Use a nonnegative integer initial cohort. Divide consumption by one minus leftovers and sum offered demand.^[1]

Paired lists must be nonempty and have equal lengths.

consumed kg = initial larvae × cumulative survival × days × grams/larva/day/1000

Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.

Output field	Meaning	Value type
expectedConsumedLeafKgByStage	Expected consumed leaf kg by stage	list of number
requiredOfferedLeafKgByStage	Required offered leaf kg by stage	list of number
totalRequiredOfferedLeafKg	Total required offered leaf kg	number

json

{
  "input": {
    "initialEriLarvae": 100,
    "stageDurationDays": [
      2,
      3
    ],
    "stageSurvivalFractions": [
      1,
      0.8
    ],
    "consumedCastorLeafGramsPerLarvaDay": [
      1,
      2
    ],
    "unconsumedOfferedLeafFractions": [
      0.2,
      0.25
    ]
  },
  "output": {
    "expectedConsumedLeafKgByStage": [
      0.2,
      0.48
    ],
    "requiredOfferedLeafKgByStage": [
      0.25,
      0.64
    ],
    "totalRequiredOfferedLeafKg": 0.89
  }
}

Limitations and assumptions

This is a supplied-stage scenario, distinct from observed feed-to-cocoon conversion.

Numbers and computed results must be finite; overflow produces an error. Numeric lists are limited to 100,000 entries; the rules above may require smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.

Alternative or Complementary methods

Use Cocoon FCR Leaf Conversion: Compute net consumed fresh/dry leaf per fresh cocoon harvest after separately assayed leftovers; unlike biomass-gain fish FCR, cocoon harvest is an explicitly different denominator. For a complementary task, use Rearing Bed Area Per 1000 DFLs: Plan stage-specific bed areas and whole trays per observed DFL/egg/hatch/survival scenario; DFL is an inventory label, not a disease-free certification or universal density.

References

Castor Eri Leaf Consumption Cycle — tool.io

Similar or alternative tools

Cocoon FCR Leaf Conversion
Compute net consumed fresh/dry leaf per fresh cocoon harvest after separately assayed leftovers; unlike biomass-gain fish FCR, cocoon harvest is an explicitly different denominator.
Rearing Bed Area Per 1000 DFLs
Plan stage-specific bed areas and whole trays per observed DFL/egg/hatch/survival scenario; DFL is an inventory label, not a disease-free certification or universal density.