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

Back | New search
 
Citation: Kaimmer, S. M., and A.W. Stoner., 2008. Field investigation of rare-earth metal as a deterrent to spiny dogfish in the Pacific halibut fishery. Fisheries Research, 94, ps 43-47.
Publisher address:
Contact information:
Link: http://www.sciencedirect.com/science
Please notify the bycatchdatabse [at] neaq [dot] org (bycatch.org Administrator) if this link no longer accesses the document.
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:
Location Fishing gear Reduction technique Bycatch species Effect on bycatch species Catch Effect on target catch Type
Alaska Hooks-and-Lines Rare earth magnets Elasmobranchs Slightly reduced bycatch of spiny dogfish but had a greater reduction on catch of longnose skate Pacific halibut Did not affect catch of halibut In the wild