Observers assessed the effectiveness of streamer-lines
For more than two months, two observers were monitoring fishing operations onboard longline fishing vessels. The vessels were fishing for cod and halibut in the Sea of Okhotsk, the Bering Sea and the Pacific Ocean. The observers were counting seabirds and marine mammals encountered during the sailing period, as well as reporting accidents of seabird mortality caused by fishing activity.
Forty five was an average number of birds which died during fishing operations on each vessel (91 species in total). As the experts say, this is a fairly low number which is considered to be the result of streamer-line usage. Almost all the time the fishermen used double streamer-lines to improve the effectiveness of these mitigation devices. No endangered species were harmed during the sailing period.
The effectiveness of streamer-lines as the mitigation devices has been proved many times before. According to scientific data, the double streamer-line lowers bird mortality by more than 90%.
© photo in the headline was taken by Yuri Artukhin