Variation in groundfish predation on juvenile walleye pollock relative to hydrographic structure near the Pribilof Islands, Alaska
Walleye pollock ( Theragra chalcogramma ) are an important forage fish in the eastern Bering Sea ecosystem. As part of an ongoing study of the processes affecting juvenile walleye pollock recruitment in the eastern Bering Sea, a concentrated effort has been focused on the hydrographic fronts near th...
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fthighwire:oai:open-archive.highwire.org:icesjms:57/2/265 2023-05-15T15:43:37+02:00 Variation in groundfish predation on juvenile walleye pollock relative to hydrographic structure near the Pribilof Islands, Alaska Lang, Geoffrey M. Brodeur, Richard D. Napp, Jeffrey M. Schabetsberger, Robert 2000-04-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/57/2/265 https://doi.org/10.1006/jmsc.1999.0600 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/57/2/265 http://dx.doi.org/10.1006/jmsc.1999.0600 Copyright (C) 2000, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Articles TEXT 2000 fthighwire https://doi.org/10.1006/jmsc.1999.0600 2013-05-27T04:57:43Z Walleye pollock ( Theragra chalcogramma ) are an important forage fish in the eastern Bering Sea ecosystem. As part of an ongoing study of the processes affecting juvenile walleye pollock recruitment in the eastern Bering Sea, a concentrated effort has been focused on the hydrographic fronts near the Pribilof Islands, Alaska, as important nursery areas for these juveniles. Diel variation in the consumption of age-0 pollock by arrowtooth flounder ( Atherethes stomias ) was examined from a series of collections at a station at the tidal front located north of St Paul Island, Alaska. Age-0 pollock were the primary prey of arrowtooth flounder throughout the day, but they were least digested in the late day, indicating a diurnal feeding pattern. A similar diurnal pattern was not seen in the vertical distribution of age-0 pollock, suggesting that the feeding pattern exhibited by arrowtooth flounder was based on their diel migratory behavior. Lengths of age-0 pollock consumed by arrowtooth flounder were similar to those sampled with midwater trawls. Walleye pollock cannibalism was examined along a transect that included samples collected at the front and offshore of the front. Age-0 fish were the primary prey (by weight) at all locations. Adjacent cohort cannibalism was prevalent (age-0 pollock were 79% of the diet by weight) at the frontal region. Estimates of age-0 pollock cannibalism rates were highest at the front for age-1 pollock and offshore for the adults. Prey selectivity analysis indicated that age-0 pollock were more highly selected offshore than at the front. Text Bering Sea Theragra chalcogramma Alaska HighWire Press (Stanford University) Bering Sea ICES Journal of Marine Science 57 2 265 271 |
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English |
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Articles |
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Articles Lang, Geoffrey M. Brodeur, Richard D. Napp, Jeffrey M. Schabetsberger, Robert Variation in groundfish predation on juvenile walleye pollock relative to hydrographic structure near the Pribilof Islands, Alaska |
topic_facet |
Articles |
description |
Walleye pollock ( Theragra chalcogramma ) are an important forage fish in the eastern Bering Sea ecosystem. As part of an ongoing study of the processes affecting juvenile walleye pollock recruitment in the eastern Bering Sea, a concentrated effort has been focused on the hydrographic fronts near the Pribilof Islands, Alaska, as important nursery areas for these juveniles. Diel variation in the consumption of age-0 pollock by arrowtooth flounder ( Atherethes stomias ) was examined from a series of collections at a station at the tidal front located north of St Paul Island, Alaska. Age-0 pollock were the primary prey of arrowtooth flounder throughout the day, but they were least digested in the late day, indicating a diurnal feeding pattern. A similar diurnal pattern was not seen in the vertical distribution of age-0 pollock, suggesting that the feeding pattern exhibited by arrowtooth flounder was based on their diel migratory behavior. Lengths of age-0 pollock consumed by arrowtooth flounder were similar to those sampled with midwater trawls. Walleye pollock cannibalism was examined along a transect that included samples collected at the front and offshore of the front. Age-0 fish were the primary prey (by weight) at all locations. Adjacent cohort cannibalism was prevalent (age-0 pollock were 79% of the diet by weight) at the frontal region. Estimates of age-0 pollock cannibalism rates were highest at the front for age-1 pollock and offshore for the adults. Prey selectivity analysis indicated that age-0 pollock were more highly selected offshore than at the front. |
format |
Text |
author |
Lang, Geoffrey M. Brodeur, Richard D. Napp, Jeffrey M. Schabetsberger, Robert |
author_facet |
Lang, Geoffrey M. Brodeur, Richard D. Napp, Jeffrey M. Schabetsberger, Robert |
author_sort |
Lang, Geoffrey M. |
title |
Variation in groundfish predation on juvenile walleye pollock relative to hydrographic structure near the Pribilof Islands, Alaska |
title_short |
Variation in groundfish predation on juvenile walleye pollock relative to hydrographic structure near the Pribilof Islands, Alaska |
title_full |
Variation in groundfish predation on juvenile walleye pollock relative to hydrographic structure near the Pribilof Islands, Alaska |
title_fullStr |
Variation in groundfish predation on juvenile walleye pollock relative to hydrographic structure near the Pribilof Islands, Alaska |
title_full_unstemmed |
Variation in groundfish predation on juvenile walleye pollock relative to hydrographic structure near the Pribilof Islands, Alaska |
title_sort |
variation in groundfish predation on juvenile walleye pollock relative to hydrographic structure near the pribilof islands, alaska |
publisher |
Oxford University Press |
publishDate |
2000 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/57/2/265 https://doi.org/10.1006/jmsc.1999.0600 |
geographic |
Bering Sea |
geographic_facet |
Bering Sea |
genre |
Bering Sea Theragra chalcogramma Alaska |
genre_facet |
Bering Sea Theragra chalcogramma Alaska |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/57/2/265 http://dx.doi.org/10.1006/jmsc.1999.0600 |
op_rights |
Copyright (C) 2000, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
op_doi |
https://doi.org/10.1006/jmsc.1999.0600 |
container_title |
ICES Journal of Marine Science |
container_volume |
57 |
container_issue |
2 |
container_start_page |
265 |
op_container_end_page |
271 |
_version_ |
1766377807276933120 |