Phocoena phocoena (Harbor porpoise)

Marine animal entanglements in mussel aquaculture gear: Documented cases from mussel farming regions of the world including first-hand accounts from Iceland

Spatial and temporal assessment of potential risk to cetaceans from static fishing gears

Study Type: 

summary

Effect on bycatch species: 

n/a

Effect on target catch: 

n/a

Article: 

Bycatch species: 

Quantification of interactions between the Portuguese sardine purse-seine fishery and cetaceans

Study Type: 

wild

Location: 

Portugal

Target catch: 

Sardine

Effect on bycatch species: 

Cetaceans were present during 16.9% of fishing events; encirclement led to common dolphin mortalities

Article: 

Bycatch species: 

Fishing Gear: 

Field Study

Study Type: 

wild

Location: 

California

Target catch: 

Swordfish and thresher shark

Effect on bycatch species: 

Decreased cetacean bycatch and no habituation. Pinniped bycatch was not significantly different

Effect on target catch: 

n/a

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study

Study Type: 

lab

Location: 

Denmark

Target catch: 

n/a

Effect on bycatch species: 

Initial response that diminished with additional trials

Effect on target catch: 

n/a

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study

Study Type: 

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: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study 795

Study Type: 

wild

Location: 

North Sea

Target catch: 

Hake

Effect on bycatch species: 

Pingers spaced at 455 m had 0 bycatch; pingers spaced at 585 m had a bycatch rate of 0.12

Effect on target catch: 

None reported

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Field Study 756

Study Type: 

wild

Location: 

Cornwall

Target catch: 

None reported

Effect on bycatch species: 

There was a significant difference in the number of porpoise clicks between nets with and without pingers, but the extent of displacement could not be determined. No evidence of habituation to the pingers.

Effect on target catch: 

None reported

Article: 

Bycatch species: 

Reduction technique: 

Fishing Gear: 

Harbor Porpoise

Species: 

Phocoena phocoena
Photo: Ari Friedlaender
Photo: Ari Friedlaender

Type: 

Mammal

Distribution: 

Cold temperate to sub-Arctic coastal waters in the Northern Hemisphere

Population: 

>700,000

Bycatch Threat: 

Gillnets and other entangling nets, weirs

IUCN Status: 

Least Concern

Although it is believed that the harbor porpoise population is not seriously in danger at present, incidental catch of the species in gillnets continues to be the primary threat throughout its range (Hammond et al 2008). Off the eastern coast of the US, an estimated 1200 to 2900 harbor porpoises were killed annually in gillnets between 1990 and 1996 (Waring et al 1998). In the North Sea, Danish annual estimates of bycatch ranged from 2867 to 7566 between 1990 and 2002 (Vinther & Larsen 2002).

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