Dictionary of Ichthyology  

troll fishery = a commercial fishery in marine waters where gear is limited to multiple lures or baits trolled behind the boat (or troller), attached to lines suspended from long poles or outriggers. The lines are often hauled in by powered equipment.

From Umali, A. F. 1950. Guide to the classification of fishing gear in the Philippines. Research Report 17, Fish and Wildlife Service, U.S. Department of the Interior, Washington.

Canadian Museum of Nature