Productivity of Pacific Herring ( Clupea harengus pallasi ) in the Eastern Bering Sea under Various Patterns of Exploitation
Pacific herring (Clupea harengus pallasi) is a major food source for western Alaska native people and has been commercially exploited in the eastern Bering Sea since the early 1900's. Commercial harvests were small and localized in coastal waters until foreign factory fleets located and develop...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
1985
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Online Access: | http://dx.doi.org/10.1139/f85-273 http://www.nrcresearchpress.com/doi/pdf/10.1139/f85-273 |
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crcansciencepubl:10.1139/f85-273 2023-12-17T10:28:08+01:00 Productivity of Pacific Herring ( Clupea harengus pallasi ) in the Eastern Bering Sea under Various Patterns of Exploitation Fried, Stephen M. Wespestad, Vidar G. 1985 http://dx.doi.org/10.1139/f85-273 http://www.nrcresearchpress.com/doi/pdf/10.1139/f85-273 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 42, issue S1, page s181-s191 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1985 crcansciencepubl https://doi.org/10.1139/f85-273 2023-11-19T13:38:57Z Pacific herring (Clupea harengus pallasi) is a major food source for western Alaska native people and has been commercially exploited in the eastern Bering Sea since the early 1900's. Commercial harvests were small and localized in coastal waters until foreign factory fleets located and developed a fishery on wintering herring concentrations in the early 1960's. Harvests peaked near 150 000 t in the early 1970's and then declined along with catch per unit effort. Foreign harvests were eliminated following establishment of the United States 200 mile Fishery Conservation Zone. In recent years a fishery has developed in State of Alaska coastal waters which harvests herring for sac roe (ovaries) during the spring spawning period. Proposals have been put forth by trawl fishermen to reestablish a food and bait fishery within Federal waters. Development of offshore mixed stock fisheries has been opposed by inshore commercial and subsistence users who fear that stocks will be overexploited. While both State and Federal managers have agreed to give subsistence users and inshore domestic commercial fishermen top priority, they have been unable to agree upon plans for dealing with potential offshore commercial harvests. In this paper we present results of a computer model that we developed to examine effects of various fishing patterns upon herring productivity and yield. Within our model, maximum sustainable yield (MSY) is achieved at an exploitation rate (E) of 0.3 (i.e. harvest of 30% of total spawning biomass). However, since stocks still appear to be below MSY biomass and since productivity and yield drop sharply at E values greater than 0.3, we suggest that an E of 0.2 be maintained under current conditions. This will result in a potential loss in yield of only 7% from an E of 0.3, but will allow a 52% increase in spawning biomass. Four fishing patterns in which both discrete and mixed stock fishery removals were allowed to occur were also examined. During years in which inshore fisheries fail to harvest 20% of ... Article in Journal/Newspaper Bering Sea Alaska Canadian Science Publishing (via Crossref) Bering Sea Pacific Canadian Journal of Fisheries and Aquatic Sciences 42 S1 s181 s191 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Fried, Stephen M. Wespestad, Vidar G. Productivity of Pacific Herring ( Clupea harengus pallasi ) in the Eastern Bering Sea under Various Patterns of Exploitation |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Pacific herring (Clupea harengus pallasi) is a major food source for western Alaska native people and has been commercially exploited in the eastern Bering Sea since the early 1900's. Commercial harvests were small and localized in coastal waters until foreign factory fleets located and developed a fishery on wintering herring concentrations in the early 1960's. Harvests peaked near 150 000 t in the early 1970's and then declined along with catch per unit effort. Foreign harvests were eliminated following establishment of the United States 200 mile Fishery Conservation Zone. In recent years a fishery has developed in State of Alaska coastal waters which harvests herring for sac roe (ovaries) during the spring spawning period. Proposals have been put forth by trawl fishermen to reestablish a food and bait fishery within Federal waters. Development of offshore mixed stock fisheries has been opposed by inshore commercial and subsistence users who fear that stocks will be overexploited. While both State and Federal managers have agreed to give subsistence users and inshore domestic commercial fishermen top priority, they have been unable to agree upon plans for dealing with potential offshore commercial harvests. In this paper we present results of a computer model that we developed to examine effects of various fishing patterns upon herring productivity and yield. Within our model, maximum sustainable yield (MSY) is achieved at an exploitation rate (E) of 0.3 (i.e. harvest of 30% of total spawning biomass). However, since stocks still appear to be below MSY biomass and since productivity and yield drop sharply at E values greater than 0.3, we suggest that an E of 0.2 be maintained under current conditions. This will result in a potential loss in yield of only 7% from an E of 0.3, but will allow a 52% increase in spawning biomass. Four fishing patterns in which both discrete and mixed stock fishery removals were allowed to occur were also examined. During years in which inshore fisheries fail to harvest 20% of ... |
format |
Article in Journal/Newspaper |
author |
Fried, Stephen M. Wespestad, Vidar G. |
author_facet |
Fried, Stephen M. Wespestad, Vidar G. |
author_sort |
Fried, Stephen M. |
title |
Productivity of Pacific Herring ( Clupea harengus pallasi ) in the Eastern Bering Sea under Various Patterns of Exploitation |
title_short |
Productivity of Pacific Herring ( Clupea harengus pallasi ) in the Eastern Bering Sea under Various Patterns of Exploitation |
title_full |
Productivity of Pacific Herring ( Clupea harengus pallasi ) in the Eastern Bering Sea under Various Patterns of Exploitation |
title_fullStr |
Productivity of Pacific Herring ( Clupea harengus pallasi ) in the Eastern Bering Sea under Various Patterns of Exploitation |
title_full_unstemmed |
Productivity of Pacific Herring ( Clupea harengus pallasi ) in the Eastern Bering Sea under Various Patterns of Exploitation |
title_sort |
productivity of pacific herring ( clupea harengus pallasi ) in the eastern bering sea under various patterns of exploitation |
publisher |
Canadian Science Publishing |
publishDate |
1985 |
url |
http://dx.doi.org/10.1139/f85-273 http://www.nrcresearchpress.com/doi/pdf/10.1139/f85-273 |
geographic |
Bering Sea Pacific |
geographic_facet |
Bering Sea Pacific |
genre |
Bering Sea Alaska |
genre_facet |
Bering Sea Alaska |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 42, issue S1, page s181-s191 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f85-273 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
42 |
container_issue |
S1 |
container_start_page |
s181 |
op_container_end_page |
s191 |
_version_ |
1785580168619753472 |