Table 3 Source and description of variables used in the model(s).

From: How technical change has boosted fish aggregation device productivity in the Indian Ocean tuna fishery

Variables

Type

Description

Source

TAC

Factor

1 or 0 (1 = TAC introduced for period 2017–2019)

NA

fadsets

Integer

Number of FOB sets per year

Ob7, Sete, France

fuel

Continuous

Average inflation adjusted to 2015 price of oil per barrel per year in USD

www.eia.gov

yft/skj

Continuous

Catch of yellowfin/skipjack in tonnes

Ob7, Sete, France

events

Integer

Number of piracy events as a measure of intensity

https://msi.nga.mil/Piracy

yftpr/skjpr

Continuous

Average inflation adjusted to 2015 price of yellowfin/skipjack per tonne per year in USD

https://www.customs.go.th/index.php?lang=en&

kW

Continuous

Vessel specific power in kilowatts

Ob7, Sete, France

dmi

Continuous

Indian Ocean Dipole index

https://sealevel.jpl.nasa.gov/data/vital-signs/indian-ocean-dipole/

fscsets

Integer

Number of FSC sets per year

Ob7, Sete, France

buoys

Integer

Maximum number of buoys deployed by vessel by year

Ob7, Sete, France

length

Continuous

Vessel overall length in metres (m)

Ob7, Sete, France

days fishing

Integer

Total number of days fishing by FOB/FSC

Ob7, Sete, France

skj_biomass

Continuous

Total spawning stock biomass of skipjack tuna in tonnes

https://iotc.org/

yft_biomass

Continuous

Total spawning stock biomass of yellowfin tuna in tonnes

https://iotc.org/