A recent study conducted by Charles Wurster of the Marine Sciences Research Center at the State University of New York indicated that bycatch mortality on diving birds caused by tuna longlines may by "even more severe than from driftnets.
Abstract--Field experiments were conducted to test the hypotheses that Pacific halibut (Hippoglossus stenolepis) display small-scale spatial structure within longline catches, relative to other species and empty hooks, or within-species based on sex or length.
For this reason, INCOPESCA must also improve its capacity to develop, implement, and monitor resource management measures including gear restrictions within these multi-use MPAs where bottom-longline and hand-line use is permitted but gillnets, trawl nets, and surface longlines are not.
A logbook was given to each fishermen, where they recorded, aided with GPS and echosounder, the following data for each fishing event: geographic position, bearing angle from port to fishing ground, distance to port and coast, depth, date, type and characteristics of fishing gear (nets or longlines, number and size of nets and longlines used), soaking time, and catch (kg of each species).
Sustainable Seas Wild Pole-Caught No Salt Added Solid Light or Solid Albacore Tuna is caught one fish at a time, which means no "by-catch"--sea turtles, dolphins, sharks, and other sea life that get caught on longlines or swept up in nets along with the tuna.