Performance of sorting grids on catching elasmobranchs in a multispecies Mediterranean bottom trawl fishery

Authors
De Santis, L.J., Bonanomi, S., Bueloni, E., Petetta, A., Annibale, O., Finotto, L., Vasapollo, C., Mazzoldi, C., Lucchetti, A. and Bottaro, M.
Year
Journal/Publisher Name
Estuarine, Coastal and Shelf Science
Volume (Issue #)
296
Page #s
11
Contact information
Sara Bonanomi, National Research Council (CNR), Institute for Marine Biological Resources and Biotechnology (IRBIM), Italy- sara.bonanomi@cnr.it
Summary

This study investigated the use of two new elasmobranch bycatch reducing devices in a Mediterranean multispecies bottom trawl fishery- the shark excluder device (SED) and a flexible grid (Flexgrid). The SED was effective in reducing elasmobranch bycatch and did not impact mantis shrimp (Squilla mantis) target catch, but did reduce catch for some large bony fish species. The results from the Flexgrid were limited due to small sample size, but there was no impact on catch of main target species although a shark was incidentally caught. SED and Flexgrid could be combined with other conservation measures such as seasonal fishing closures to mitigate elasmobranch bycatch. 

 

Field Studies

Performance of sorting grids on catching elasmobranchs in a multispecies Mediterranean bottom trawl fishery

Study Type
Field study in the wild
Location
Adriatic Sea
Target catch
bony fishes and crustaceans
Effect on bycatch species
Shark Excluder Device (SED) was effective in reducing elasmobranch bycatch
Effect on target catch
SED had no effect on mantis shrimp (Squilla mantis), but did reduce some target bony fish species catch
Bycatch species
Reduction technique
Fishing Gear

Performance of sorting grids on catching elasmobranchs in a multispecies Mediterranean bottom trawl fishery

Study Type
Field study in the wild
Location
Adriatic Sea
Target catch
Red mullet (Mullus barbatus), European hake (Merluccius merluccius), mantis shrimp
Effect on bycatch species
Flexgrid effectiveness in reducing elasmobranch catch was inconclusive (small sample size)
Effect on target catch
no effect on target bony fish and mantis shrimp catches
Bycatch species
Reduction technique
Fishing Gear