Modelled connectivity between Walleye Pollock (Gadus chalcogrammus) spawning and age-0 nursery areas in warm and cold years with implications for juvenile survival
Abstract Adult and early life stage distributions of the commercially important demersal fish Walleye Pollock (Gadus chalcogrammus) have varied in relation to the warm and cold environmental conditions on the eastern Bering Sea (EBS) shelf. Previous modelling studies indicate that transport alone do...
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ftcdlib:oai:escholarship.org:ark:/13030/qt8wd8538k 2023-05-15T13:15:08+02:00 Modelled connectivity between Walleye Pollock (Gadus chalcogrammus) spawning and age-0 nursery areas in warm and cold years with implications for juvenile survival Petrik, Colleen M Duffy-Anderson, Janet T Castruccio, Frederic Curchitser, Enrique N Danielson, Seth L Hedstrom, Katherine Mueter, Franz 1890 - 1900 2016-07-01 application/pdf https://escholarship.org/uc/item/8wd8538k unknown eScholarship, University of California qt8wd8538k https://escholarship.org/uc/item/8wd8538k public ICES Journal of Marine Science, vol 73, iss 7 Bering Sea connectivity fish early life history pollock Fisheries article 2016 ftcdlib 2023-02-13T18:45:33Z Abstract Adult and early life stage distributions of the commercially important demersal fish Walleye Pollock (Gadus chalcogrammus) have varied in relation to the warm and cold environmental conditions on the eastern Bering Sea (EBS) shelf. Previous modelling studies indicate that transport alone does not account for the disparate juvenile distributions in warm and cold years, but that spawning locations are important. Our objective was to determine the potential connectivity of EBS pollock spawning areas with juvenile nursery areas between warm and cold years from an 18-year hindcast (1995–2012). We calculated the connectivity between larval sources and juvenile positions that were produced by a coupled biological-physical individual-based model that simulated transport, growth, and vertical behavior of pollock from the egg until the juvenile stage. Three connectivity patterns were seen in most simulations: along-isobaths to the northwest, self-retention, and transport around the Pribilof Islands. The major differences in connectivity between warm and cold years, more northwards in warm years and more off-shelf in cold years, mimicked wind-driven flow characteristics of those years that were related to winter mean zonal position of the Aleutian Low. Connectivity relationships were more sensitive to spatial alterations in the spawning areas in cold years, while they were more responsive to spawn timing shifts in warm years. The strongest connectivity to advantageous juvenile habitats originated in the well-known spawning areas, but also in a less well-studied region on the Outer Shelf. This northern Outer Shelf region emerged as a very large sink of pollock reaching the juvenile transition from all spawning sources, suggesting more thorough sampling across multiple trophic levels of this potentially important juvenile pollock nursery is needed. Article in Journal/Newspaper aleutian low Bering Sea University of California: eScholarship Bering Sea |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Bering Sea connectivity fish early life history pollock Fisheries |
spellingShingle |
Bering Sea connectivity fish early life history pollock Fisheries Petrik, Colleen M Duffy-Anderson, Janet T Castruccio, Frederic Curchitser, Enrique N Danielson, Seth L Hedstrom, Katherine Mueter, Franz Modelled connectivity between Walleye Pollock (Gadus chalcogrammus) spawning and age-0 nursery areas in warm and cold years with implications for juvenile survival |
topic_facet |
Bering Sea connectivity fish early life history pollock Fisheries |
description |
Abstract Adult and early life stage distributions of the commercially important demersal fish Walleye Pollock (Gadus chalcogrammus) have varied in relation to the warm and cold environmental conditions on the eastern Bering Sea (EBS) shelf. Previous modelling studies indicate that transport alone does not account for the disparate juvenile distributions in warm and cold years, but that spawning locations are important. Our objective was to determine the potential connectivity of EBS pollock spawning areas with juvenile nursery areas between warm and cold years from an 18-year hindcast (1995–2012). We calculated the connectivity between larval sources and juvenile positions that were produced by a coupled biological-physical individual-based model that simulated transport, growth, and vertical behavior of pollock from the egg until the juvenile stage. Three connectivity patterns were seen in most simulations: along-isobaths to the northwest, self-retention, and transport around the Pribilof Islands. The major differences in connectivity between warm and cold years, more northwards in warm years and more off-shelf in cold years, mimicked wind-driven flow characteristics of those years that were related to winter mean zonal position of the Aleutian Low. Connectivity relationships were more sensitive to spatial alterations in the spawning areas in cold years, while they were more responsive to spawn timing shifts in warm years. The strongest connectivity to advantageous juvenile habitats originated in the well-known spawning areas, but also in a less well-studied region on the Outer Shelf. This northern Outer Shelf region emerged as a very large sink of pollock reaching the juvenile transition from all spawning sources, suggesting more thorough sampling across multiple trophic levels of this potentially important juvenile pollock nursery is needed. |
format |
Article in Journal/Newspaper |
author |
Petrik, Colleen M Duffy-Anderson, Janet T Castruccio, Frederic Curchitser, Enrique N Danielson, Seth L Hedstrom, Katherine Mueter, Franz |
author_facet |
Petrik, Colleen M Duffy-Anderson, Janet T Castruccio, Frederic Curchitser, Enrique N Danielson, Seth L Hedstrom, Katherine Mueter, Franz |
author_sort |
Petrik, Colleen M |
title |
Modelled connectivity between Walleye Pollock (Gadus chalcogrammus) spawning and age-0 nursery areas in warm and cold years with implications for juvenile survival |
title_short |
Modelled connectivity between Walleye Pollock (Gadus chalcogrammus) spawning and age-0 nursery areas in warm and cold years with implications for juvenile survival |
title_full |
Modelled connectivity between Walleye Pollock (Gadus chalcogrammus) spawning and age-0 nursery areas in warm and cold years with implications for juvenile survival |
title_fullStr |
Modelled connectivity between Walleye Pollock (Gadus chalcogrammus) spawning and age-0 nursery areas in warm and cold years with implications for juvenile survival |
title_full_unstemmed |
Modelled connectivity between Walleye Pollock (Gadus chalcogrammus) spawning and age-0 nursery areas in warm and cold years with implications for juvenile survival |
title_sort |
modelled connectivity between walleye pollock (gadus chalcogrammus) spawning and age-0 nursery areas in warm and cold years with implications for juvenile survival |
publisher |
eScholarship, University of California |
publishDate |
2016 |
url |
https://escholarship.org/uc/item/8wd8538k |
op_coverage |
1890 - 1900 |
geographic |
Bering Sea |
geographic_facet |
Bering Sea |
genre |
aleutian low Bering Sea |
genre_facet |
aleutian low Bering Sea |
op_source |
ICES Journal of Marine Science, vol 73, iss 7 |
op_relation |
qt8wd8538k https://escholarship.org/uc/item/8wd8538k |
op_rights |
public |
_version_ |
1766267079093125120 |