Turtle bycatch (gillnets and other entangling nets)

Globally, total reported marine turtle bycatch is estimated at 85,000 turtles, but due to the small percentage of fishing effort observed or reprted this figure is a likely underestimate by at least two orders of magnitude (8.5 million). Six of the seven marine turtle species are categorized as Vulnerable, Endangered, or Critically Endangered globally by the IUCN Red List and fisheries bycatch is recognized as a major threat to all species. Bycatch of sea turtles in small-scale set net fisheries is considered the single greatest threat for some sea turtle populations.

Further information on the use of LED lights to reduce turtle bycatch in gillnet and other entangling net fisheries can be found in the evidence base below.

Find out more about our NetLights here.

Fishtek Marine Solutions

Marine Issues

Gillnet

Trawls

Longline

Purse seine

Pots & Traps

Offshore drilling

Evidence Base

Paper

LED Used

Effect

Species

Gear Type

Darquea et al., 2020.

Constant green

Constant green

93% reduction

No effect

Green Turtle

Olive Ridley Turtle

Artisanal gillnet 

Artisanal gillnet 

Allman et al., 2020.

Constant green

Constant green

Constant green

74 % reduction

82% reduction

91% reduction

Leatherback Turtle

Olive Ridley Turtle

Green Turtle

Drift gillnet

Drift gillnet

Drift gillnet

Bielli et al., 2020.

Constant green

Constant green

Constant green

70 – 74% reduction

70 – 74% reduction

70 – 74% reduction

Loggerhead Turtle

Olive Ridley Turtle

Green Turtle

Surface drift & bottom-set gillnet

Surface drift & bottom-set gillnet

Surface drift & bottom-set gillnet

Lucchetti et al., 2019.

Constant UV

100% reduction

Loggerhead Turtle

Bottom-set gillnet

Virgili et al., 2018.

Constant UV

100% reduction

Loggerhead Turtle

Bottom-set gillnet

Ortiz et al., 2016

Constant green

64% reduction

Green Turtle

Artisanal gillnet

Wang et al., 2013.

Constant UV

40% reduction

Green Turtle

Coastal & Pelagic gillnet 

Wang et al., 2010.

Constant green

40% reduction

Green Turtle

Artisanal gillnet