Alternative leader design

A leader is the line between the mainline and the hook.

Field Study

Study Type: 

wild

Location: 

Chesapeake Bay, United States

Target catch: 

Atlantic thread herring, butterfish, Atlantic croaker, weakfish

Effect on bycatch species: 

Significantly reduced sea turtle interactions

Effect on target catch: 

No difference

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Field Study

Study Type: 

wild

Location: 

Chesapeake Bay

Target catch: 

Finfish

Effect on bycatch species: 

. During the study, 21 sea turtles interacted with the control net, while only 1 interaction with the experimental net occurred, which was a significant difference.

Effect on target catch: 

There was no significant difference in the harvest weight or size selectivity of finfish between the two nets (control and experimental)

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Field Study 363

Study Type: 

wild

Location: 

Georges Bank

Target catch: 

Swordfish

Effect on bycatch species: 

No signficant difference in catch rates between gangions for loggerhead sea turtles.

Effect on target catch: 

There were no differences in the mean length at capture, but signficantly more swordfish were caught on the monofilament gangions.

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Field Study 362

Study Type: 

wild

Location: 

Georges Bank

Target catch: 

Swordfish

Effect on bycatch species: 

No signficant difference in catch rates between gangions for white marlin.

Effect on target catch: 

There were no differences in the mean length at capture, but signficantly more swordfish were caught on the monofilament gangions.

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Field Study 361

Study Type: 

wild

Location: 

Georges Bank

Target catch: 

Swordfish

Effect on bycatch species: 

Signficant differences in catch rates for blue sharks and pelagic stingrays between the two gangions, with more animals being caught on the monofilament gangions. No significant difference was found between gangions for mako sharks.

Effect on target catch: 

There were no differences in the mean length at capture, but signficantly more swordfish were caught on the monofilament gangions.

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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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Fishing Gear: 

ant

Study Type: 

wild

Location: 

Northeastern Australia

Target catch: 

Bigeye and yellowfin tuna

Effect on bycatch species: 

Wire leaders had higher catch rates of sharks when compared to nylon monofilament leaders

Effect on target catch: 

Nylon monofilament leaders had higher catch rates of bigeye tunas when compared to wire leaders, but had no effect on yellowfin catch

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Performance in 2005 of an alternative leader design on the bycatch of sea turtles and the catch of finfish in Chesapeake Bay pound nets, offshore Kiptopeake, VA Data and results of preliminary analyses

Study Type: 

wild

Location: 

Chesapeake Bay

Target catch: 

Multiple species

Effect on bycatch species: 

Reduced interactions

Effect on target catch: 

No change in target catch

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