Interactions of seabirds with fishing gear in pollock and squid trawl fisheries in the northwestern part of the Bering Sea during the ice-free period
https://doi.org/10.36038/2307-3497-2022-188-98-109
Abstract
Purpose of the work: Identification of species-specific features of seabird interactions with trawl fishing gear, comparison of the results obtained with the same data from the Sea of Okhotsk trawl fisheries.
Methods used: The analysis is based on materials collected on board a large freezing trawler in September–October 2021 in the northwestern part of the Bering Sea according to the methodology used in similar studies in other areas of the Pacific Ocean and tested by the author in the Sea of Okhotsk pollock expedition in 2015 and 2020.
Novelty: The results of the research confirm that the net sonar third wire cable poses the greatest danger to birds in the trawl fisheries in the Bering Sea. During the autumn fishing period, the main part of bird collisions with fishing gear (61.8 %) falls on short-tailed shearwaters, which form mass concentrations around trawlers at this time. As a rule, bird contacts with trawl wires are light and do not threaten their lives, but in 0.3 % of cases, severe collisions occur, leading to the death of birds. The frequency of contacts with fishing gear for all birds depends on their number near the vessel and the direction of the wind relative to the course, and in northern fulmars it also depends on the intensity of the discharge of catch processing from the fish factory.
Practical significance: The results obtained are necessary for the process of ecological certification of the specialized pollock trawl fishery in the West Bering Sea zone.
About the Author
Y. B. Artukhin
Kamchatka Branch of Pacific Geographical Institute («KB PGI FEB RAS»)
Russian Federation
Russian Federation
Yuri B. Artukhin
683024
19a, pr. Rybakov
Petropavlovsk-Kamchatsky
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Review
For citations:
Artukhin Y.B. Interactions of seabirds with fishing gear in pollock and squid trawl fisheries in the northwestern part of the Bering Sea during the ice-free period. Trudy VNIRO. 2022;188:98-109. (In Russ.) https://doi.org/10.36038/2307-3497-2022-188-98-109
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