Sharks

Field Study 844

Study Type: 

wild

Location: 

Venezuela

Target catch: 

shrimp

Effect on bycatch species: 

Decrease of 26-32%

Effect on target catch: 

Maintained or increased

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Field Study 798

Study Type: 

wild

Location: 

Scotian Shelf

Target catch: 

Swordfish

Effect on bycatch species: 

No effect

Effect on target catch: 

Significantly reduced on hooks treated with control lead (56%) and Nd/Pr (48%)

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Field Study 793

Study Type: 

wild

Location: 

Seychelles

Target catch: 

Tunas and swordfish

Effect on bycatch species: 

75% of bycatch species were caught during day sets, with lancetfish being the most common. Sharks were most common during night sets.

Effect on target catch: 

75% of market species were caught during day sets.

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Whale Shark

Species: 

Rhincodon typus
(c) Wolcott Henry 2005/Marine Photobank

Type: 

Fish

Distribution: 

Tropical and warm temperate waters 30˚N to 35˚S, with the exception of the Mediterranean Sea

Population: 

Decreasing

Bycatch Threat: 

Gillnets, purse seines, longlines

IUCN Status: 

Vulnerable

Historically, the whale shark has been hunted for its meat and liver oil. Whale shark fins are considered inferior in quality and the species is generally not targeted for its fins, although a market for them does exist in Asia due to their massive size (Norman 2005). Despite the fact that there is a paucity of data regarding whale shark bycatch, it is believed that the species most commonly becomes entangled in purse seines, longlines, and gillnets, particularly set nets.

Field Study 725

Study Type: 

wild

Location: 

Pacific Ocean

Target catch: 

None reported

Effect on bycatch species: 

Metal affixed to baited hook significantly reduced catches of juvenile hammerhead sharks but not blue, shortfin mako, pelagic thresher, sandbar or tiger sharks

Effect on target catch: 

None reported

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