Environmental controls of fish growth in the southeast Bering Sea
Thesis (M.S.) University of Alaska Fairbanks, 2003 Environmental controls of fish growth in the Bering Sea were investigated by examining growth increments and length-at-age. A sea ice-initiated conceptual model of growth that differentiates between food and water temperature controls was proposed....
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ftunivalaska:oai:scholarworks.alaska.edu:11122/6352 2023-05-15T15:43:32+02:00 Environmental controls of fish growth in the southeast Bering Sea Palmer, Michael Collins 2003-08 http://hdl.handle.net/11122/6352 en_US eng http://hdl.handle.net/11122/6352 Graduate Program in Marine Sciences and Limnology Thesis ms 2003 ftunivalaska 2023-02-23T21:36:38Z Thesis (M.S.) University of Alaska Fairbanks, 2003 Environmental controls of fish growth in the Bering Sea were investigated by examining growth increments and length-at-age. A sea ice-initiated conceptual model of growth that differentiates between food and water temperature controls was proposed. The timing of ice retreat in the region was hypothesized to control food availability by influencing the fate of primary production and inversely affecting prey availability in pelagic and benthic environments. The extent and persistence of ice coverage was hypothesized to influence shelf water temperatures through' cold pool' development. Utility of the conceptual model was assessed through regression and correlation analyses of the growth of two representative pelagic feeding species, walleye pollock and Pacific herring, and two benthic feeders, yellowfin sole and rock sole. The usefulness of herring and rock sole as indicator species of their respective feeding guilds is lessened due to feeding location and diet breadth, respectively. Food availability was shown to be the primary control of fish growth as evidenced by the growth model results of pollock and yellowfin sole and inverse size-at-age time series of these two species. The ecosystem implications of differential fish growth were assessed through investigation of the relationship of growth to condition factor and recruitment. Thesis Bering Sea Sea ice Alaska University of Alaska: ScholarWorks@UA Bering Sea Fairbanks Pacific |
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University of Alaska: ScholarWorks@UA |
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ftunivalaska |
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English |
description |
Thesis (M.S.) University of Alaska Fairbanks, 2003 Environmental controls of fish growth in the Bering Sea were investigated by examining growth increments and length-at-age. A sea ice-initiated conceptual model of growth that differentiates between food and water temperature controls was proposed. The timing of ice retreat in the region was hypothesized to control food availability by influencing the fate of primary production and inversely affecting prey availability in pelagic and benthic environments. The extent and persistence of ice coverage was hypothesized to influence shelf water temperatures through' cold pool' development. Utility of the conceptual model was assessed through regression and correlation analyses of the growth of two representative pelagic feeding species, walleye pollock and Pacific herring, and two benthic feeders, yellowfin sole and rock sole. The usefulness of herring and rock sole as indicator species of their respective feeding guilds is lessened due to feeding location and diet breadth, respectively. Food availability was shown to be the primary control of fish growth as evidenced by the growth model results of pollock and yellowfin sole and inverse size-at-age time series of these two species. The ecosystem implications of differential fish growth were assessed through investigation of the relationship of growth to condition factor and recruitment. |
format |
Thesis |
author |
Palmer, Michael Collins |
spellingShingle |
Palmer, Michael Collins Environmental controls of fish growth in the southeast Bering Sea |
author_facet |
Palmer, Michael Collins |
author_sort |
Palmer, Michael Collins |
title |
Environmental controls of fish growth in the southeast Bering Sea |
title_short |
Environmental controls of fish growth in the southeast Bering Sea |
title_full |
Environmental controls of fish growth in the southeast Bering Sea |
title_fullStr |
Environmental controls of fish growth in the southeast Bering Sea |
title_full_unstemmed |
Environmental controls of fish growth in the southeast Bering Sea |
title_sort |
environmental controls of fish growth in the southeast bering sea |
publishDate |
2003 |
url |
http://hdl.handle.net/11122/6352 |
geographic |
Bering Sea Fairbanks Pacific |
geographic_facet |
Bering Sea Fairbanks Pacific |
genre |
Bering Sea Sea ice Alaska |
genre_facet |
Bering Sea Sea ice Alaska |
op_relation |
http://hdl.handle.net/11122/6352 Graduate Program in Marine Sciences and Limnology |
_version_ |
1766377715933380608 |