Growth dynamics of juvenile yellowfin sole (Pleuronectes asper) and northern rock sole (Lepidopsetta polyxystra) in the eastern Bering Sea
Thesis (M.S.) University of Alaska Fairbanks, 2003 The first five growth zones of 744 yellowfin sole and 512 northern rock sole otoliths were measured from year-classes 1974-1989, to identify patterns of annual growth and sources of temporal variation. Growth patterns were observed graphically and t...
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ftunivalaska:oai:scholarworks.alaska.edu:11122/6656 2023-05-15T15:43:20+02:00 Growth dynamics of juvenile yellowfin sole (Pleuronectes asper) and northern rock sole (Lepidopsetta polyxystra) in the eastern Bering Sea Williams, Benjamin Charles 2003-12 http://hdl.handle.net/11122/6656 en_US eng http://hdl.handle.net/11122/6656 Fisheries Division Thesis ms 2003 ftunivalaska 2023-02-23T21:36:42Z Thesis (M.S.) University of Alaska Fairbanks, 2003 The first five growth zones of 744 yellowfin sole and 512 northern rock sole otoliths were measured from year-classes 1974-1989, to identify patterns of annual growth and sources of temporal variation. Growth patterns were observed graphically and temporal variation was examined by partitioning growth into year and age effects via linear models. Growth and recruitment relationships with biological and environmental variables were explored through correlation analysis and stepwise regression. Results indicate that growth of yellowfin sole and rock sole declined from the late 1970s to the mid 1980s. Yellowfin sole length at age rebounded after 1985, while rock sole length at age continued to decline until at least the early 1990s. Density-dependent factors such as competition during early growth years overshadow the impacts of environmental variables on growth for both yellowfin sole and rock sole, possibly due to the complex oceanographic and atmospheric relationships that exist in the Bering Sea. Recruitment strengths of yellowfin sole and rock sole have significant environmental components suggesting that survival rates may be influenced by environmental conditions. Also, interspecific competition with yellowfin sole may be influencing rock sole recruitment in the eastern Bering Sea. Thesis Bering Sea Alaska University of Alaska: ScholarWorks@UA Bering Sea Fairbanks |
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Open Polar |
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University of Alaska: ScholarWorks@UA |
op_collection_id |
ftunivalaska |
language |
English |
description |
Thesis (M.S.) University of Alaska Fairbanks, 2003 The first five growth zones of 744 yellowfin sole and 512 northern rock sole otoliths were measured from year-classes 1974-1989, to identify patterns of annual growth and sources of temporal variation. Growth patterns were observed graphically and temporal variation was examined by partitioning growth into year and age effects via linear models. Growth and recruitment relationships with biological and environmental variables were explored through correlation analysis and stepwise regression. Results indicate that growth of yellowfin sole and rock sole declined from the late 1970s to the mid 1980s. Yellowfin sole length at age rebounded after 1985, while rock sole length at age continued to decline until at least the early 1990s. Density-dependent factors such as competition during early growth years overshadow the impacts of environmental variables on growth for both yellowfin sole and rock sole, possibly due to the complex oceanographic and atmospheric relationships that exist in the Bering Sea. Recruitment strengths of yellowfin sole and rock sole have significant environmental components suggesting that survival rates may be influenced by environmental conditions. Also, interspecific competition with yellowfin sole may be influencing rock sole recruitment in the eastern Bering Sea. |
format |
Thesis |
author |
Williams, Benjamin Charles |
spellingShingle |
Williams, Benjamin Charles Growth dynamics of juvenile yellowfin sole (Pleuronectes asper) and northern rock sole (Lepidopsetta polyxystra) in the eastern Bering Sea |
author_facet |
Williams, Benjamin Charles |
author_sort |
Williams, Benjamin Charles |
title |
Growth dynamics of juvenile yellowfin sole (Pleuronectes asper) and northern rock sole (Lepidopsetta polyxystra) in the eastern Bering Sea |
title_short |
Growth dynamics of juvenile yellowfin sole (Pleuronectes asper) and northern rock sole (Lepidopsetta polyxystra) in the eastern Bering Sea |
title_full |
Growth dynamics of juvenile yellowfin sole (Pleuronectes asper) and northern rock sole (Lepidopsetta polyxystra) in the eastern Bering Sea |
title_fullStr |
Growth dynamics of juvenile yellowfin sole (Pleuronectes asper) and northern rock sole (Lepidopsetta polyxystra) in the eastern Bering Sea |
title_full_unstemmed |
Growth dynamics of juvenile yellowfin sole (Pleuronectes asper) and northern rock sole (Lepidopsetta polyxystra) in the eastern Bering Sea |
title_sort |
growth dynamics of juvenile yellowfin sole (pleuronectes asper) and northern rock sole (lepidopsetta polyxystra) in the eastern bering sea |
publishDate |
2003 |
url |
http://hdl.handle.net/11122/6656 |
geographic |
Bering Sea Fairbanks |
geographic_facet |
Bering Sea Fairbanks |
genre |
Bering Sea Alaska |
genre_facet |
Bering Sea Alaska |
op_relation |
http://hdl.handle.net/11122/6656 Fisheries Division |
_version_ |
1766377409350729728 |