Cetacean bycatch (gillnets, trawls, pots and traps and trawls)

Globally, it is estimated that at least 300,000 whales, dolphins and porposies (cetaceans) are caught and killed as bycatch every year. Bycatch of cetaceans occurs in all kinds of fishing operations, from large industrial to localised artisanal fisheries. Cetacean bycatch is now considered the single most serious, direct threat to cetacean populations. Cetaceans can become entangled many types of fishing gear including nets, ropes and lines with gillnets and entangling nets known to cause the highest amount of cetacean bycatch.

Further information on the use of acoustic pingers to reduce cetacean bycatch can be found in the evidence base below.

Find out more about our Banana Pinger range here.

Fishtek Marine Solutions

Gillnet

Trawls

Longline

Purse seine

Pots & Traps

Offshore drilling

Evidence Base

Paper

Pinger Used

Effect

Species

Gear Type

Moan and Bjorg, 2021

50 -120 kHz

97% reduction

Harbour porpoise

Gillnet

Jimenez et al., 2021

50 -120 kHz

61% reduction

Franciscana

Artisanal gillnet

Jimenez et al., 2021

40 kHz

88% reduction

Franciscana

Trawl

Basran et al., 2020

3 – 20 kHz

Facilitated safe exit from net

Humpback whale

Purse seine

Mangel et al., 2013

50 -120 kHz

50 -120 kHz

50 -120 kHz

50 -120 kHz

45% reduction

10% reduction

39% reduction

75% reduction

Common dolphin

Dusky dolphin

Bottlenose dolphin

Burmeister porpoise

Gillnet

Gillnet

Gillnet

Gillnet

Caretta and Barlow, 2011

10 kHz

50% reduction

100% reduction

Common dolphin

Beaked whales

Drift net

Drift net

Palka et al. 2008

10 kHz

50 – 70% reduction

Harbour porpoise

Gillnet

Imbert et al., 2007

10 kHz

81% reduction

Striped dolphin

Drift net

Barlow and Cameron, 2006

10 kHz

92% reduction

75% reduction

67% reduction

Short beaked common dolphin

Other cetaceans

Pinnipeds 

Drift net

Drift net

Drift net

Lien et al., 1992

10 kHz

94% reduction

Humpback whale 

Pots and traps