Franciscana bycatch is not reduced by acoustically reflective or physically stiffened gillnets

Authors
Bordino, P., Mackay, A.I., Werner, T.B., Northridge, S.P., and Read, A.J.
Year
Journal/Publisher Name
Endangered Species Research
Volume (Issue #)
21
Page #s
1-12
Contact information
P. Bordino: bordino@aquamarina.org
Summary

Experimental trials were carried out in Argentina comparing franciscana (Pontoporia blainvillei) bycatch rates in standard gillnets with gillnets with increased acoustic reglectivity by infusion with barium sulphate (BaSO4) and increased flexural stiffness of the nylon twine. There was no significant difference in franciscana bycatch rates or target catch rates among the three net types.  

Link
http://www.int-res.com/articles/esr_oa/n021p001.pdf

Field Studies

Franciscana bycatch is not reduced by acoustically reflective or physically stiffened gillnets

Study Type
Field study in the wild
Location
San Clemente del Tuyu, Argentina
Target catch
Striped weakfish (Cynoscion guatucupa), whitemouth croaker (Micropogonias furnieri)
Effect on bycatch species
No significant reduction
Effect on target catch
No significant difference
Bycatch species
Small Cetaceans (maximum length < 7.5 meters)
Pontoporia blainvillei (Franciscana dolphin)
Reduction technique
Metal oxide/barium sulfate nets
Fishing Gear
Gillnets and Entangling Nets

Franciscana bycatch is not reduced by acoustically reflective or physically stiffened gillnets

Study Type
Field study in the wild
Location
San Clemente del Tuyu, Argentina
Target catch
Striped weakfish (Cynoscion guatucupa), whitemouth croaker (Micropogonias furnieri)
Effect on bycatch species
No significant reduction
Effect on target catch
No significant difference
Bycatch species
Small Cetaceans (maximum length < 7.5 meters)
Pontoporia blainvillei (Franciscana dolphin)
Reduction technique
Stiff gillnet
Fishing Gear
Gillnets and Entangling Nets