Bycatch Reduction Calculator

Expected bycatch reduction from gear modification.

Inputs

Total catch (kg)

Current bycatch %

%

Device reduction %

%

BRD cost ($)

Bycatch penalty ($/kg)

Tab to move between fields

Results

Bycatch saved (kg)

500

New bycatch %15

Fine savings/trip ($)$250.00

Trips to payback8

Remaining bycatch (kg)750

How to Use This Calculator

Enter Total catch (kg), Current bycatch %, and Device reduction %.
Set BRD cost ($) and Bycatch penalty ($/kg).
Review the Bycatch saved (kg) result.
Use New bycatch % and Fine savings/trip ($) ($) to inform your decision.

How the result changes with Total catch (kg)

Total catch (kg)	Bycatch saved (kg)
100,001	10,000.1
350,001	35,000.1
650,000	65,000
900,000	90,000

What each input means

Total catch (kg): Total catch per trip in kilograms.
Current bycatch %: Current bycatch as percentage of total catch.
Device reduction %: Expected bycatch reduction from the BRD.
BRD cost ($): Cost of the bycatch reduction device.
Bycatch penalty ($/kg): Penalty or landing fee per kg of bycatch.

What each result means

Bycatch saved (kg): Kilograms of bycatch eliminated per trip.
New bycatch %: Bycatch percentage after device installation.
Fine savings/trip ($): Penalty savings per fishing trip.
Trips to payback: Number of trips to recoup device cost.
Remaining bycatch (kg): Bycatch remaining after device installation.

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Total catch (kg) = 5000, Current bycatch % = 25, Device reduction % = 40, BRD cost ($) = 2000 = 5 input(s) provided
Calculate Bycatch saved
Bycatch saved = currentBycatchKg - reducedBycatchKg
500 = 500
Calculate New bycatch %
New bycatch % = round((reducedBycatchKg / totalCatchKg) * 10000) / 100
15 = 15
Calculate Fine savings/trip
Fine savings/trip = currentFines - reducedFines
250 = $250

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