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

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: 

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: 

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: 

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: 

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: