Spatial and temporal patterns of walleye pollock ( Theragra chalcogramma) spawning in the eastern Bering Sea inferred from egg and larval distributions
Abstract Walleye pollock Theragra chalcogramma (pollock hereafter) is a key ecological and economic species in the eastern Bering Sea, yet detailed synthesis of the spatial and temporal patterns of pollock ichthyoplankton in this important region is lacking. This knowledge gap is particularly severe...
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crwiley:10.1111/j.1365-2419.2009.00531.x 2024-09-30T14:33:06+00:00 Spatial and temporal patterns of walleye pollock ( Theragra chalcogramma) spawning in the eastern Bering Sea inferred from egg and larval distributions BACHELER, NATHAN M. CIANNELLI, LORENZO BAILEY, KEVIN M. DUFFY‐ANDERSON, JANET T. 2010 http://dx.doi.org/10.1111/j.1365-2419.2009.00531.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2419.2009.00531.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2419.2009.00531.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Fisheries Oceanography volume 19, issue 2, page 107-120 ISSN 1054-6006 1365-2419 journal-article 2010 crwiley https://doi.org/10.1111/j.1365-2419.2009.00531.x 2024-09-17T04:44:45Z Abstract Walleye pollock Theragra chalcogramma (pollock hereafter) is a key ecological and economic species in the eastern Bering Sea, yet detailed synthesis of the spatial and temporal patterns of pollock ichthyoplankton in this important region is lacking. This knowledge gap is particularly severe considering that egg and larval distribution are essential to reconstructing spawning locations and early life stages drift pathways. We used 19 yr of ichthyoplankton collections to determine the spatial and temporal patterns of egg and larval distribution. Generalized additive models (GAMs) identified two primary temporal pulses of pollock eggs, the first occurring from 20 February to 31 March and the second from 20 April to 20 May; larvae showed similar, but slightly lagged, pulses. Based on generalized cross‐validation and information theory, a GAM model that allowed for different seasonal patterns in egg density within three unique areas outperformed a GAM that assumed a single fixed seasonal pattern across the entire eastern Bering Sea. This ‘area‐dependent’ GAM predicted the highest densities of eggs (i.e., potential spawning locations) in three major areas of the eastern Bering Sea: near Bogoslof Island (February–April), north of Unimak Island and the Alaska Peninsula (March–April), and around the Pribilof Islands (April–August). Unique temporal patterns of egg density were observed for each area, suggesting that pollock spawning may be more spatially and temporally complex than previously assumed. Moreover, this work provides a valuable baseline of pollock spawning to which future changes, such as those resulting from climate variability, may be compared. Article in Journal/Newspaper Bering Sea Theragra chalcogramma Alaska Wiley Online Library Bering Sea Gam ENVELOPE(-57.955,-57.955,-61.923,-61.923) Fisheries Oceanography 19 2 107 120 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Walleye pollock Theragra chalcogramma (pollock hereafter) is a key ecological and economic species in the eastern Bering Sea, yet detailed synthesis of the spatial and temporal patterns of pollock ichthyoplankton in this important region is lacking. This knowledge gap is particularly severe considering that egg and larval distribution are essential to reconstructing spawning locations and early life stages drift pathways. We used 19 yr of ichthyoplankton collections to determine the spatial and temporal patterns of egg and larval distribution. Generalized additive models (GAMs) identified two primary temporal pulses of pollock eggs, the first occurring from 20 February to 31 March and the second from 20 April to 20 May; larvae showed similar, but slightly lagged, pulses. Based on generalized cross‐validation and information theory, a GAM model that allowed for different seasonal patterns in egg density within three unique areas outperformed a GAM that assumed a single fixed seasonal pattern across the entire eastern Bering Sea. This ‘area‐dependent’ GAM predicted the highest densities of eggs (i.e., potential spawning locations) in three major areas of the eastern Bering Sea: near Bogoslof Island (February–April), north of Unimak Island and the Alaska Peninsula (March–April), and around the Pribilof Islands (April–August). Unique temporal patterns of egg density were observed for each area, suggesting that pollock spawning may be more spatially and temporally complex than previously assumed. Moreover, this work provides a valuable baseline of pollock spawning to which future changes, such as those resulting from climate variability, may be compared. |
format |
Article in Journal/Newspaper |
author |
BACHELER, NATHAN M. CIANNELLI, LORENZO BAILEY, KEVIN M. DUFFY‐ANDERSON, JANET T. |
spellingShingle |
BACHELER, NATHAN M. CIANNELLI, LORENZO BAILEY, KEVIN M. DUFFY‐ANDERSON, JANET T. Spatial and temporal patterns of walleye pollock ( Theragra chalcogramma) spawning in the eastern Bering Sea inferred from egg and larval distributions |
author_facet |
BACHELER, NATHAN M. CIANNELLI, LORENZO BAILEY, KEVIN M. DUFFY‐ANDERSON, JANET T. |
author_sort |
BACHELER, NATHAN M. |
title |
Spatial and temporal patterns of walleye pollock ( Theragra chalcogramma) spawning in the eastern Bering Sea inferred from egg and larval distributions |
title_short |
Spatial and temporal patterns of walleye pollock ( Theragra chalcogramma) spawning in the eastern Bering Sea inferred from egg and larval distributions |
title_full |
Spatial and temporal patterns of walleye pollock ( Theragra chalcogramma) spawning in the eastern Bering Sea inferred from egg and larval distributions |
title_fullStr |
Spatial and temporal patterns of walleye pollock ( Theragra chalcogramma) spawning in the eastern Bering Sea inferred from egg and larval distributions |
title_full_unstemmed |
Spatial and temporal patterns of walleye pollock ( Theragra chalcogramma) spawning in the eastern Bering Sea inferred from egg and larval distributions |
title_sort |
spatial and temporal patterns of walleye pollock ( theragra chalcogramma) spawning in the eastern bering sea inferred from egg and larval distributions |
publisher |
Wiley |
publishDate |
2010 |
url |
http://dx.doi.org/10.1111/j.1365-2419.2009.00531.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2419.2009.00531.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2419.2009.00531.x |
long_lat |
ENVELOPE(-57.955,-57.955,-61.923,-61.923) |
geographic |
Bering Sea Gam |
geographic_facet |
Bering Sea Gam |
genre |
Bering Sea Theragra chalcogramma Alaska |
genre_facet |
Bering Sea Theragra chalcogramma Alaska |
op_source |
Fisheries Oceanography volume 19, issue 2, page 107-120 ISSN 1054-6006 1365-2419 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2419.2009.00531.x |
container_title |
Fisheries Oceanography |
container_volume |
19 |
container_issue |
2 |
container_start_page |
107 |
op_container_end_page |
120 |
_version_ |
1811637110461956096 |