Incidental Catch of Marine Mammals by Foreign and Joint Venture Trawl Vessels in the U.S. EEZ of the North Pacific, 1973-88
During 1973-88, 3,661 marine mammals of 17 species were reported as incidental catch by U.S. fishery observers aboard foreign and joint venture trawl vessels in the U.S.Exclusive Economic Zone in the North Pacific Ocean and the Bering Sea. Northern sea lions (Eumetopias jubatus) accounted for 90% of...
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ftoceandocs:oai:aquadocs.org:1834/20503 2023-05-15T15:43:25+02:00 Incidental Catch of Marine Mammals by Foreign and Joint Venture Trawl Vessels in the U.S. EEZ of the North Pacific, 1973-88 Perez, Michael A. Loughlin, Thomas 1991 application/pdf http://hdl.handle.net/1834/20503 en eng NOAA/National Marine Fisheries Service NOAA Technical Report NMFS http://spo.nwr.noaa.gov/tr104.pdf http://hdl.handle.net/1834/20503 http://aquaticcommons.org/id/eprint/2711 403 2011-09-29 18:30:52 2711 United States National Marine Fisheries Service Management Fisheries monograph 1991 ftoceandocs 2023-04-06T17:01:39Z During 1973-88, 3,661 marine mammals of 17 species were reported as incidental catch by U.S. fishery observers aboard foreign and joint venture trawl vessels in the U.S.Exclusive Economic Zone in the North Pacific Ocean and the Bering Sea. Northern sea lions (Eumetopias jubatus) accounted for 90% of the reported incidental mortality in the Gulf of Alaska and eastern Bering Sea. Nearly half of these sea lions were taken in trawl nets in the Shelikof Strait, Alaska, joint venture fishery during 1982-84. However, high incidental mortality rates (>25 sea lions per 10,000 metric tons of groundfish catch) also occurred in the foreign fisheries near Kodiak Island and in the Aleutian Islands area in earlier years. Estimated annual mortality of incidentally caught northern sea lions inAlaska declined from 1,000 to 2,000 animals per year during the early 1970s and 1982 to fewer than 100 animals in 1988. In the Bering Sea most sea lions incidentally caught weremales, while in the Gulf of Alaska females were more frequently caught. Females may also have been dominant in the incidental catch of sea lions in the Aleutian Islands area, but age and sex composition data are limited. Incidental mortality of adult female sea lions by foreign trawl fisheries in these areas could have partially contributed to the reported declines in northern sea lion populations in Alaska during the 1970s, but it cannot aloneaccount for the present decline in population size. (PDF file contains 64 pages.) Book Bering Sea Kodiak Alaska Aleutian Islands IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications Bering Sea Gulf of Alaska Pacific |
institution |
Open Polar |
collection |
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
op_collection_id |
ftoceandocs |
language |
English |
topic |
Management Fisheries |
spellingShingle |
Management Fisheries Perez, Michael A. Loughlin, Thomas Incidental Catch of Marine Mammals by Foreign and Joint Venture Trawl Vessels in the U.S. EEZ of the North Pacific, 1973-88 |
topic_facet |
Management Fisheries |
description |
During 1973-88, 3,661 marine mammals of 17 species were reported as incidental catch by U.S. fishery observers aboard foreign and joint venture trawl vessels in the U.S.Exclusive Economic Zone in the North Pacific Ocean and the Bering Sea. Northern sea lions (Eumetopias jubatus) accounted for 90% of the reported incidental mortality in the Gulf of Alaska and eastern Bering Sea. Nearly half of these sea lions were taken in trawl nets in the Shelikof Strait, Alaska, joint venture fishery during 1982-84. However, high incidental mortality rates (>25 sea lions per 10,000 metric tons of groundfish catch) also occurred in the foreign fisheries near Kodiak Island and in the Aleutian Islands area in earlier years. Estimated annual mortality of incidentally caught northern sea lions inAlaska declined from 1,000 to 2,000 animals per year during the early 1970s and 1982 to fewer than 100 animals in 1988. In the Bering Sea most sea lions incidentally caught weremales, while in the Gulf of Alaska females were more frequently caught. Females may also have been dominant in the incidental catch of sea lions in the Aleutian Islands area, but age and sex composition data are limited. Incidental mortality of adult female sea lions by foreign trawl fisheries in these areas could have partially contributed to the reported declines in northern sea lion populations in Alaska during the 1970s, but it cannot aloneaccount for the present decline in population size. (PDF file contains 64 pages.) |
format |
Book |
author |
Perez, Michael A. Loughlin, Thomas |
author_facet |
Perez, Michael A. Loughlin, Thomas |
author_sort |
Perez, Michael A. |
title |
Incidental Catch of Marine Mammals by Foreign and Joint Venture Trawl Vessels in the U.S. EEZ of the North Pacific, 1973-88 |
title_short |
Incidental Catch of Marine Mammals by Foreign and Joint Venture Trawl Vessels in the U.S. EEZ of the North Pacific, 1973-88 |
title_full |
Incidental Catch of Marine Mammals by Foreign and Joint Venture Trawl Vessels in the U.S. EEZ of the North Pacific, 1973-88 |
title_fullStr |
Incidental Catch of Marine Mammals by Foreign and Joint Venture Trawl Vessels in the U.S. EEZ of the North Pacific, 1973-88 |
title_full_unstemmed |
Incidental Catch of Marine Mammals by Foreign and Joint Venture Trawl Vessels in the U.S. EEZ of the North Pacific, 1973-88 |
title_sort |
incidental catch of marine mammals by foreign and joint venture trawl vessels in the u.s. eez of the north pacific, 1973-88 |
publisher |
NOAA/National Marine Fisheries Service |
publishDate |
1991 |
url |
http://hdl.handle.net/1834/20503 |
geographic |
Bering Sea Gulf of Alaska Pacific |
geographic_facet |
Bering Sea Gulf of Alaska Pacific |
genre |
Bering Sea Kodiak Alaska Aleutian Islands |
genre_facet |
Bering Sea Kodiak Alaska Aleutian Islands |
op_source |
http://aquaticcommons.org/id/eprint/2711 403 2011-09-29 18:30:52 2711 United States National Marine Fisheries Service |
op_relation |
NOAA Technical Report NMFS http://spo.nwr.noaa.gov/tr104.pdf http://hdl.handle.net/1834/20503 |
_version_ |
1766377545039609856 |