Field investigation of rare-earth metal as a deterrent to spiny dogfish in the Pacific halibut fishery

Authors
Kaimmer, S. M., and A.W. Stoner.
Year
Journal/Publisher Name
Fisheries Research
Volume (Issue #)
94
Page #s
43-47
Summary
Rare earth metals (made of cerium mischmetal) were compared with control treatments of standard circle hooks and inert steel above circle hooks on longline fishing gear to determine if bycatch reduction of spiny dogfish could be achieved. Results indicated a slight reduction in dogfish bycatch and a greater reduction in catch of longnose skate on hooks with mischmetal. Problems for using mischmetal commercially include its expense, hazardous nature, and rapid hydrolysis in seawater.

Field Studies

Field investigation of rare-earth metal as a deterrent to spiny dogfish in the Pacific halibut fishery

Study Type
Field study in the wild
Location
Alaska
Target catch
Pacific halibut
Effect on bycatch species
Slightly reduced bycatch of spiny dogfish
Effect on target catch
Did not affect catch of halibut
Bycatch species
Reduction technique
Fishing Gear

Field investigation of rare-earth metal as a deterrent to spiny dogfish in the Pacific halibut fishery

Study Type
Field study in the wild
Location
Alaska
Target catch
Pacific halibut
Effect on bycatch species
Experimental hooks resulted in greater reduction on catch of longnose skate
Effect on target catch
Did not affect catches
Bycatch species
Reduction technique
Fishing Gear