Fishery, Climate, and Ecological Effects on Pacific Halibut Size-at-age in the Gulf of Alaska
This study investigated the size-at-age (SAA) of Pacific halibut in the Gulf of Alaska and Bering Sea. In the past two decades, the size-at-age of halibut has undergone an extensive reduction. Observed SAA of Pacific halibut has changed substantially over time and the reasons behind changes in halib...
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dataone:10.24431_rw1k44z_2020_6_12_19238 2024-06-03T18:46:46+00:00 Fishery, Climate, and Ecological Effects on Pacific Halibut Size-at-age in the Gulf of Alaska Joan Forsberg BEGINDATE: 1992-01-01T09:00:00Z ENDDATE: 2013-01-01T09:00:00Z 2020-06-12T19:23:09.041Z https://search.dataone.org/view/10.24431_rw1k44z_2020_6_12_19238 unknown Research Workspace OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > BERING SEA CONTINENT > NORTH AMERICA > CANADA > BRITISH COLUMBIA OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > GULF OF ALASKA Hippoglossus stenolepis Pacific halibut, alabato del Pacífico 1936-1993 collection years for re-aging years 1977-2002 birth years 1992-2013 otolith collection years otolith Pacific halibut Hippoglossus stenolepis age and growth North Pacific Research Board environmental factors ecological factors growth changes size-at-age Dataset dataone:urn:node:RW 2024-06-03T18:16:30Z This study investigated the size-at-age (SAA) of Pacific halibut in the Gulf of Alaska and Bering Sea. In the past two decades, the size-at-age of halibut has undergone an extensive reduction. Observed SAA of Pacific halibut has changed substantially over time and the reasons behind changes in halibut SAA are not well understood. This project compared new and historical surface ages to demonstrate whether a differing degree of bias is present in surface ages made in earlier decades relative to those made today due to factors such as changes in surface age assignment protocol over time or quality of microscopes used. Data are presented as fifteen CSV files: Decadal re-aging: NPRB_1309_1_decadal_reaging_data.csv Otolith and maturity codes: NPRB_1309_1_decadal_reaging_codes.csv NPRB_1309_1_individual_increment_codes.csv Increment data includes one CSV file for each cohort (1977, 1987, 1992, 2002) and IPHC Regulatory Area (2B, 3A and 4D): NPRB_1309_1_individual_increment_data_2B_1977.csv NPRB_1309_1_individual_increment_data_3A_1977.csv NPRB_1309_1_individual_increment_data_4D_1977.csv NPRB_1309_1_individual_increment_data_4D_1987.csv NPRB_1309_1_individual_increment_data_3A_1987.csv NPRB_1309_1_individual_increment_data_2B_1987.csv NPRB_1309_1_individual_increment_data_3A_1992.csv NPRB_1309_1_individual_increment_data_2B_1992.csv NPRB_1309_1_individual_increment_data_4D_1992.csv NPRB_1309_1_individual_increment_data_2B_2002.csv NPRB_1309_1_individual_increment_data_3A_2002.csv NPRB_1309_1_individual_increment_data_4D_2002.csv Dataset Bering Sea Alaska Research Workspace (via DataONE) Bering Sea Gulf of Alaska Canada Pacific British Columbia ENVELOPE(-125.003,-125.003,54.000,54.000) |
institution |
Open Polar |
collection |
Research Workspace (via DataONE) |
op_collection_id |
dataone:urn:node:RW |
language |
unknown |
topic |
OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > BERING SEA CONTINENT > NORTH AMERICA > CANADA > BRITISH COLUMBIA OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > GULF OF ALASKA Hippoglossus stenolepis Pacific halibut, alabato del Pacífico 1936-1993 collection years for re-aging years 1977-2002 birth years 1992-2013 otolith collection years otolith Pacific halibut Hippoglossus stenolepis age and growth North Pacific Research Board environmental factors ecological factors growth changes size-at-age |
spellingShingle |
OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > BERING SEA CONTINENT > NORTH AMERICA > CANADA > BRITISH COLUMBIA OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > GULF OF ALASKA Hippoglossus stenolepis Pacific halibut, alabato del Pacífico 1936-1993 collection years for re-aging years 1977-2002 birth years 1992-2013 otolith collection years otolith Pacific halibut Hippoglossus stenolepis age and growth North Pacific Research Board environmental factors ecological factors growth changes size-at-age Joan Forsberg Fishery, Climate, and Ecological Effects on Pacific Halibut Size-at-age in the Gulf of Alaska |
topic_facet |
OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > BERING SEA CONTINENT > NORTH AMERICA > CANADA > BRITISH COLUMBIA OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > GULF OF ALASKA Hippoglossus stenolepis Pacific halibut, alabato del Pacífico 1936-1993 collection years for re-aging years 1977-2002 birth years 1992-2013 otolith collection years otolith Pacific halibut Hippoglossus stenolepis age and growth North Pacific Research Board environmental factors ecological factors growth changes size-at-age |
description |
This study investigated the size-at-age (SAA) of Pacific halibut in the Gulf of Alaska and Bering Sea. In the past two decades, the size-at-age of halibut has undergone an extensive reduction. Observed SAA of Pacific halibut has changed substantially over time and the reasons behind changes in halibut SAA are not well understood. This project compared new and historical surface ages to demonstrate whether a differing degree of bias is present in surface ages made in earlier decades relative to those made today due to factors such as changes in surface age assignment protocol over time or quality of microscopes used. Data are presented as fifteen CSV files: Decadal re-aging: NPRB_1309_1_decadal_reaging_data.csv Otolith and maturity codes: NPRB_1309_1_decadal_reaging_codes.csv NPRB_1309_1_individual_increment_codes.csv Increment data includes one CSV file for each cohort (1977, 1987, 1992, 2002) and IPHC Regulatory Area (2B, 3A and 4D): NPRB_1309_1_individual_increment_data_2B_1977.csv NPRB_1309_1_individual_increment_data_3A_1977.csv NPRB_1309_1_individual_increment_data_4D_1977.csv NPRB_1309_1_individual_increment_data_4D_1987.csv NPRB_1309_1_individual_increment_data_3A_1987.csv NPRB_1309_1_individual_increment_data_2B_1987.csv NPRB_1309_1_individual_increment_data_3A_1992.csv NPRB_1309_1_individual_increment_data_2B_1992.csv NPRB_1309_1_individual_increment_data_4D_1992.csv NPRB_1309_1_individual_increment_data_2B_2002.csv NPRB_1309_1_individual_increment_data_3A_2002.csv NPRB_1309_1_individual_increment_data_4D_2002.csv |
format |
Dataset |
author |
Joan Forsberg |
author_facet |
Joan Forsberg |
author_sort |
Joan Forsberg |
title |
Fishery, Climate, and Ecological Effects on Pacific Halibut Size-at-age in the Gulf of Alaska |
title_short |
Fishery, Climate, and Ecological Effects on Pacific Halibut Size-at-age in the Gulf of Alaska |
title_full |
Fishery, Climate, and Ecological Effects on Pacific Halibut Size-at-age in the Gulf of Alaska |
title_fullStr |
Fishery, Climate, and Ecological Effects on Pacific Halibut Size-at-age in the Gulf of Alaska |
title_full_unstemmed |
Fishery, Climate, and Ecological Effects on Pacific Halibut Size-at-age in the Gulf of Alaska |
title_sort |
fishery, climate, and ecological effects on pacific halibut size-at-age in the gulf of alaska |
publisher |
Research Workspace |
publishDate |
|
url |
https://search.dataone.org/view/10.24431_rw1k44z_2020_6_12_19238 |
op_coverage |
BEGINDATE: 1992-01-01T09:00:00Z ENDDATE: 2013-01-01T09:00:00Z |
long_lat |
ENVELOPE(-125.003,-125.003,54.000,54.000) |
geographic |
Bering Sea Gulf of Alaska Canada Pacific British Columbia |
geographic_facet |
Bering Sea Gulf of Alaska Canada Pacific British Columbia |
genre |
Bering Sea Alaska |
genre_facet |
Bering Sea Alaska |
_version_ |
1800870839757832192 |