Processes affecting the productivity of capelin and pollock in the Gulf of Alaska Project #F0524
The over-arching goal of this project was to investigate the processes affecting the productivity of capelin and walleye pollock, important forage fishes in the Gulf of Alaska (GOA). The first objective was to investigate the key physical processes by comparing the distribution of fish with oceanogr...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.169.7705 2023-05-15T17:04:40+02:00 Processes affecting the productivity of capelin and pollock in the Gulf of Alaska Project #F0524 Elizabeth A. Logerwell Janet Duffy-anderson Matthew Wilson Patricia Livingston Key Words The Pennsylvania State University CiteSeerX Archives 2008 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.169.7705 http://doc.nprb.org/web/05_prjs/524_Final%20report%20REVISED%2010-10-08.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.169.7705 http://doc.nprb.org/web/05_prjs/524_Final%20report%20REVISED%2010-10-08.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://doc.nprb.org/web/05_prjs/524_Final%20report%20REVISED%2010-10-08.pdf Capelin Mallotus villosus pollock Theragra chalcogramma Gulf of Alaska foraging interspecific competition growth fisheries acoustics oceanography. Citation text 2008 ftciteseerx 2016-01-07T15:57:26Z The over-arching goal of this project was to investigate the processes affecting the productivity of capelin and walleye pollock, important forage fishes in the Gulf of Alaska (GOA). The first objective was to investigate the key physical processes by comparing the distribution of fish with oceanographic properties and the distribution of prey. The second objective was to investigate the potential for interspecific competition by comparing measures of foraging success between capelin and juvenile pollock. The field study to address these objectives was conducted in Barnabus Trough off Kodiak Island during September 2005 on the NOAA Vessel Miller Freeman. The distribution of fish was assessed with fisheries acoustics and mid-water trawls. Fish were collected from trawls for stomach contents. Physical and biological data were collected with conductivity-temperature-depth (CTD) probes and zooplankton tows. Our results support the linkage between oceanography, prey, fish diet and fish distribution. We found that age-0 pollock were distributed in cool, high-salinity waters offshore of a mid-trough front, coincident with the distribution of the bulk of their preferred prey, euphausiids. In contrast to pollock, we found that capelin were distributed throughout the trough, as was the distribution of their dominant prey, copepods. Although capelin and pollock had different diets in 2005, in a previous year’s survey (2004) they were both found inshore of the mid-trough front foraging on euphausiids, suggesting the potential for Text Kodiak Theragra chalcogramma Alaska Copepods Unknown Gulf of Alaska |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
topic |
Capelin Mallotus villosus pollock Theragra chalcogramma Gulf of Alaska foraging interspecific competition growth fisheries acoustics oceanography. Citation |
spellingShingle |
Capelin Mallotus villosus pollock Theragra chalcogramma Gulf of Alaska foraging interspecific competition growth fisheries acoustics oceanography. Citation Elizabeth A. Logerwell Janet Duffy-anderson Matthew Wilson Patricia Livingston Key Words Processes affecting the productivity of capelin and pollock in the Gulf of Alaska Project #F0524 |
topic_facet |
Capelin Mallotus villosus pollock Theragra chalcogramma Gulf of Alaska foraging interspecific competition growth fisheries acoustics oceanography. Citation |
description |
The over-arching goal of this project was to investigate the processes affecting the productivity of capelin and walleye pollock, important forage fishes in the Gulf of Alaska (GOA). The first objective was to investigate the key physical processes by comparing the distribution of fish with oceanographic properties and the distribution of prey. The second objective was to investigate the potential for interspecific competition by comparing measures of foraging success between capelin and juvenile pollock. The field study to address these objectives was conducted in Barnabus Trough off Kodiak Island during September 2005 on the NOAA Vessel Miller Freeman. The distribution of fish was assessed with fisheries acoustics and mid-water trawls. Fish were collected from trawls for stomach contents. Physical and biological data were collected with conductivity-temperature-depth (CTD) probes and zooplankton tows. Our results support the linkage between oceanography, prey, fish diet and fish distribution. We found that age-0 pollock were distributed in cool, high-salinity waters offshore of a mid-trough front, coincident with the distribution of the bulk of their preferred prey, euphausiids. In contrast to pollock, we found that capelin were distributed throughout the trough, as was the distribution of their dominant prey, copepods. Although capelin and pollock had different diets in 2005, in a previous year’s survey (2004) they were both found inshore of the mid-trough front foraging on euphausiids, suggesting the potential for |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Elizabeth A. Logerwell Janet Duffy-anderson Matthew Wilson Patricia Livingston Key Words |
author_facet |
Elizabeth A. Logerwell Janet Duffy-anderson Matthew Wilson Patricia Livingston Key Words |
author_sort |
Elizabeth A. Logerwell |
title |
Processes affecting the productivity of capelin and pollock in the Gulf of Alaska Project #F0524 |
title_short |
Processes affecting the productivity of capelin and pollock in the Gulf of Alaska Project #F0524 |
title_full |
Processes affecting the productivity of capelin and pollock in the Gulf of Alaska Project #F0524 |
title_fullStr |
Processes affecting the productivity of capelin and pollock in the Gulf of Alaska Project #F0524 |
title_full_unstemmed |
Processes affecting the productivity of capelin and pollock in the Gulf of Alaska Project #F0524 |
title_sort |
processes affecting the productivity of capelin and pollock in the gulf of alaska project #f0524 |
publishDate |
2008 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.169.7705 http://doc.nprb.org/web/05_prjs/524_Final%20report%20REVISED%2010-10-08.pdf |
geographic |
Gulf of Alaska |
geographic_facet |
Gulf of Alaska |
genre |
Kodiak Theragra chalcogramma Alaska Copepods |
genre_facet |
Kodiak Theragra chalcogramma Alaska Copepods |
op_source |
http://doc.nprb.org/web/05_prjs/524_Final%20report%20REVISED%2010-10-08.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.169.7705 http://doc.nprb.org/web/05_prjs/524_Final%20report%20REVISED%2010-10-08.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766058992654614528 |