Exploring the effect of installing collars on snow crab (Chionoecetes opilio) pots in Newfoundland and Labrador: Do collars improve size selectivity?

Authors
Brown, P., Araya-Schmidt, T., Bayse, S.M., Winger, P.D.
Year
Journal/Publisher Name
Fisheries Research
Volume (Issue #)
300 (107782)
Contact information
P. Brown: peter.brown@mi.mun.ca
Summary

Four experimental snow crab (Chionoecetes opilio) conical pots with non-selective, small mesh jackets  and collars of 180 mm, 240 mm, 300 mm, and 180 mm with a 51 mm lip, were compared with small mesh pots with no collar and traditional pots with traditional mesh in Conception Bay, Canada. Smaller collars did not improve catch efficiency (but did not significantly reduce target catch), and caught large amounts of sub-legal and female crabs.  Additionally, larger collars substantially reduced catch of target-sized crabs (although sub-legal catch was also reduced). Future work will integrate escape gaps to assist escapement. 

Field Studies

Exploring the effect of installing collars on snow crab (Chionoecetes opilio) pots in Newfoundland and Labrador: Do collars improve size selectivity?

Study Type
Field study in the wild
Location
Conception Bay, Canada
Target catch
Snow crab (Chionoecetes opilio)
Effect on bycatch species
External plastic collars did not meaningfully improve size selectivity
Effect on target catch
Smaller collars produced similar catch levels as traditional pots, while larger collars reduced catch of legal-sized crabs
Reduction technique
Fishing Gear