Do rare-earth metals deter spiny dogfish? A feasibility study on the use of electropositive "mischmetal" to reduce the bycatch of Squalus acanthias by hook gear in the Gulf of Maine

A rare-earth metal alloy (cerium/lanthanide) was tested to determine if it could reduce bycatch of spiny dogfish (Squalus acanthias) in longlines and rod and reel fisheries in the Gulf of Maine, United States. Laboratory and field trials showed no significant reduction in dogfish catch.