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Evaluation of a pound net leader designed to reduce sea turtle bycatch

Submitted by morgaac on

An experimental leader design was tested on pound nets in the Chesapeake Bay in 2004 and 2005 to determine their effectiveness in reducing the incidental catches of sea turtles.  The experimental design consisted of replacing the top two thirds of the traditional mesh panel leader with vertical ropes spaced 61 cm apart. 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.

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Field Study

Study Type
Field study in the 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)
Bycatch species
Reduction technique
Fishing Gear

Field Study

Study Type
Field study in the 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)
Bycatch species
Reduction technique
Fishing Gear

Field Study

Study Type
Field study in the 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)
Bycatch species
Reduction technique
Fishing Gear

Field Study

Study Type
Field study in the wild
Location
Eastern Pacific
Target catch
tuna and billfish
Effect on bycatch species
Small circle hook (C15) had lowest catch of sharks
Effect on target catch
Small circle hook (C15) had lowest catch of billfish
Bycatch species
Reduction technique
Fishing Gear

Field Study

Study Type
Field study in the wild
Location
Eastern Pacific
Target catch
tuna and billfish
Effect on bycatch species
Small circle hook (C15) had lowest catch of sharks
Effect on target catch
Small circle hook (C15) had lowest catch of billfish
Bycatch species
Reduction technique
Fishing Gear

Field Study

Study Type
Field study in the wild
Location
Eastern Pacific
Target catch
tuna and billfish
Effect on bycatch species
Small circle hook (C15) had lowest catch of sharks
Effect on target catch
Small circle hook (C15) had lowest catch of billfish
Bycatch species
Reduction technique
Fishing Gear

Development and testing of a release panel for sharks and non-target finfish in purse seine gear

Submitted by morgaac on

An experimental release panel was installed in purse seine nets to determine their ability to release both silky sharks and non-target finfish.  The release panels (5.5 m wide, extending down from the corkline for 11 m) were installed in a portion of the net that forms a "pocket" toward the end of net retrieval.  Dive surveys previously reported that silky sharks tend to segregate and collect in this section of the net.  The release panel was tested during seven purse seine sets, but only two silky sharks (out of 105) exited through this panel.

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