Passive acoustic deterrents

Objects such as rubber tubes, thick polyester rope, and chains attached to fishing nets to alert a marine cetacean to their presence using echolocation (Hembree and Harwood 1987).

Displaying 1 - 8 of 8

North Atlantic right whales (Eubalaena glacialis) ignore ships but respond to alerting stimuli

Study Type: 

Field study in the wild

Location: 

Bay of Fundy

Target catch: 

N/A

Effect on bycatch species: 

Whales showed a mild response to social sounds of conspecifics and no response to sound of approaching vessel.

Effect on target catch: 

N/A

Article: 

North Atlantic right whales (Eubalaena glacialis) ignore ships but respond to alerting stimuli

Bycatch species: 

Reduction technique: 

North Atlantic right whales (Eubalaena glacialis) ignore ships but respond to alerting stimuli

Study Type: 

Field study in the wild

Location: 

Bay of Fundy

Target catch: 

na

Effect on bycatch species: 

Whales showed a strong response to alert signals.

Effect on target catch: 

N/A

Article: 

North Atlantic right whales (Eubalaena glacialis) ignore ships but respond to alerting stimuli

Bycatch species: 

Reduction technique: 

Multivariate analysis of behavioral response experiments in humpback whales (Megaptera novaeangliae)

Study Type: 

Field study in the wild

Location: 

Australia

Target catch: 

N/A

Effect on bycatch species: 

Humpback whales responded to 'tones' by moving offshore and surfacing more often, perhaps trying to avoid the stimuli. Responses to social sounds were more variable.

Effect on target catch: 

N/A

Article: 

Multivariate analysis of behavioral response experiments in humpback whales (Megaptera novaeangliae)

Bycatch species: 

Reduction technique: 

Acoustic methods of reducing or eliminating marine mammal-fishery interactions: do they work?

Study Type: 

Summary study

Target catch: 

N/A

Effect on bycatch species: 

Net alarms do not appear ver effective in reducing small cetacean entanglements in gillnets

Effect on target catch: 

N/A

Article: 

Acoustic methods of reducing or eliminating marine mammal-fishery interactions: do they work?

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study

Study Type: 

Study in the lab

Location: 

Neeltje Jans, The Netherlands

Target catch: 

n/a

Effect on bycatch species: 

Increased distance from the alarm source and respiration

Effect on target catch: 

n/a

Article: 

The effects of acoustic alarms on the behavior of harbor porpoises (Phocoena phocoena) in a floating pen

Bycatch species: 

Reduction technique: 

Fishing Gear: