Sea Turtles

Field Study 369

Study Type: 

wild

Location: 

Australia

Target catch: 

Bigeye tuna

Effect on bycatch species: 

None reported

Effect on target catch: 

Weighted longlines had a slightly higher overall CPUE (1.3 fish/100 hooks) compared to traditional longlines (1.08 fish/100 hooks) and caught more bigeye (0.95 fish/ 100 hooks) than traditional longlines (0.56 fish/100 hooks). Catch rates were not very

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Field Study 354

Study Type: 

wild

Location: 

Northern Australia

Target catch: 

Prawns

Effect on bycatch species: 

JT 2 design did not prevent capture of sea turtles

Effect on target catch: 

Caught 5.2% more tiger prawns and 6.9% more endeavour prawns than standard net

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Field Study 353

Study Type: 

wild

Location: 

Northern Australia

Target catch: 

Prawns

Effect on bycatch species: 

JT 1 design did not prevent capture of sea turtles

Effect on target catch: 

Caught 6.6% more tiger prawns and 10.5% more endeavour prawns than standard net

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Field Study 347

Study Type: 

wild

Location: 

US Mid Atlantic

Target catch: 

Scallop

Effect on bycatch species: 

Reduced interactions between hard shelled sea turtles and dredge gear

Effect on target catch: 

None reported

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Field Study 335

Study Type: 

wild

Location: 

Chesapeake Bay, Virginia

Target catch: 

Finfish, including: Atlantic tread herring (Opisthonema oglinum), harvestfish (Peprilus alepidotus), butterfish (Peprilus triacanthus), Atlantic croaker (Micropogonias undulatus) and weakfish (Cynoscion regalis)

Effect on bycatch species: 

Significant reduction of sea turtles bycatch

Effect on target catch: 

No difference for four species, increased catch of a fifth

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Field Study 326

Study Type: 

wild

Location: 

Northern Australia

Target catch: 

Prawns

Effect on bycatch species: 

Little effect

Effect on target catch: 

Little effect

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Field Study 321

Study Type: 

wild

Location: 

Northern Australia

Target catch: 

Prawns

Effect on bycatch species: 

Downward facing TEDs reduced sea turtle catches by 100%

Effect on target catch: 

Reduced the proportion of soft and damaged prawns by 63.2% and reduced catches of tiger prawns by 6.3%

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Field Study 303

Study Type: 

wild

Location: 

Western Australia

Target catch: 

Red emperor, scarlet perch, spangled emperor, Rankin cod, blue spot emperor, rosy threadfin brea, flagfish, frypan snapper, red snapper and goldband snapper

Effect on bycatch species: 

Redcuced catches rates from 26.2 (catch per 1000 shots) to 0.9

Effect on target catch: 

None reported

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Field Study 275

Study Type: 

wild

Location: 

Northern Australia

Target catch: 

Prawns

Effect on bycatch species: 

Reduced sea turtle catches by 100%

Effect on target catch: 

Reduced the proportion of soft and damaged prawns by 41.6% and reduced catches of tiger prawns by 6.5%

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