Variation in organochlorine bioaccumulation by a predatory fish; gender, geography, and data analysis methods
ΣPCB and p,p′-DDE levels within and among walleye (Stizostedion vitreum) populations were examined to determine how the method of data analysis could influence the interpretation of (i) gender differences and (ii) geographic variation. In the lower Great Lakes (Huron, Erie, and Ontario) whole-body b...
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ftunivwindsor:oai:scholar.uwindsor.ca:glierpub-1447 2023-06-11T04:15:26+02:00 Variation in organochlorine bioaccumulation by a predatory fish; gender, geography, and data analysis methods Johnston, Thomas A. Fisk, Aaron T. Whittle, D. Michael Muir, Derek C.G. 2002-10-15T07:00:00Z https://scholar.uwindsor.ca/glierpub/445 https://doi.org/10.1021/es0115060 unknown Scholarship at UWindsor https://scholar.uwindsor.ca/glierpub/445 doi:10.1021/es0115060 https://doi.org/10.1021/es0115060 Great Lakes Institute for Environmental Research Publications text 2002 ftunivwindsor https://doi.org/10.1021/es0115060 2023-05-06T19:10:57Z ΣPCB and p,p′-DDE levels within and among walleye (Stizostedion vitreum) populations were examined to determine how the method of data analysis could influence the interpretation of (i) gender differences and (ii) geographic variation. In the lower Great Lakes (Huron, Erie, and Ontario) whole-body burdens of both contaminants tended to increase with body mass at a faster rate in males than in females. Thus, males generally had higher burdens than females at large body sizes but not at small body sizes. This result was not strongly influenced by the method of expressing contaminant level (burden, wet mass concentration, or lipid mass concentration) but was influenced by the choice of covariate (body mass, body length, or age) in some cases. Mean ΣPCB and p,p′-DDE concentrations of walleye muscle declined along a gradient from the lower Great Lakes to the Northwest Territories. Analyses using means adjusted for age yielded a stronger contrast between Great Lakes and non-Great Lakes populations than analyses using means adjusted for body length. The gender composition of fish samples and the type and level of covariate used in statistical analyses should be considered in studies of spatiotemporal variation in organochlorine bioaccumulation in fish. Text Northwest Territories University of Windsor, Ontario: Scholarship at UWindsor Northwest Territories Environmental Science & Technology 36 20 4238 4244 |
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Open Polar |
collection |
University of Windsor, Ontario: Scholarship at UWindsor |
op_collection_id |
ftunivwindsor |
language |
unknown |
description |
ΣPCB and p,p′-DDE levels within and among walleye (Stizostedion vitreum) populations were examined to determine how the method of data analysis could influence the interpretation of (i) gender differences and (ii) geographic variation. In the lower Great Lakes (Huron, Erie, and Ontario) whole-body burdens of both contaminants tended to increase with body mass at a faster rate in males than in females. Thus, males generally had higher burdens than females at large body sizes but not at small body sizes. This result was not strongly influenced by the method of expressing contaminant level (burden, wet mass concentration, or lipid mass concentration) but was influenced by the choice of covariate (body mass, body length, or age) in some cases. Mean ΣPCB and p,p′-DDE concentrations of walleye muscle declined along a gradient from the lower Great Lakes to the Northwest Territories. Analyses using means adjusted for age yielded a stronger contrast between Great Lakes and non-Great Lakes populations than analyses using means adjusted for body length. The gender composition of fish samples and the type and level of covariate used in statistical analyses should be considered in studies of spatiotemporal variation in organochlorine bioaccumulation in fish. |
format |
Text |
author |
Johnston, Thomas A. Fisk, Aaron T. Whittle, D. Michael Muir, Derek C.G. |
spellingShingle |
Johnston, Thomas A. Fisk, Aaron T. Whittle, D. Michael Muir, Derek C.G. Variation in organochlorine bioaccumulation by a predatory fish; gender, geography, and data analysis methods |
author_facet |
Johnston, Thomas A. Fisk, Aaron T. Whittle, D. Michael Muir, Derek C.G. |
author_sort |
Johnston, Thomas A. |
title |
Variation in organochlorine bioaccumulation by a predatory fish; gender, geography, and data analysis methods |
title_short |
Variation in organochlorine bioaccumulation by a predatory fish; gender, geography, and data analysis methods |
title_full |
Variation in organochlorine bioaccumulation by a predatory fish; gender, geography, and data analysis methods |
title_fullStr |
Variation in organochlorine bioaccumulation by a predatory fish; gender, geography, and data analysis methods |
title_full_unstemmed |
Variation in organochlorine bioaccumulation by a predatory fish; gender, geography, and data analysis methods |
title_sort |
variation in organochlorine bioaccumulation by a predatory fish; gender, geography, and data analysis methods |
publisher |
Scholarship at UWindsor |
publishDate |
2002 |
url |
https://scholar.uwindsor.ca/glierpub/445 https://doi.org/10.1021/es0115060 |
geographic |
Northwest Territories |
geographic_facet |
Northwest Territories |
genre |
Northwest Territories |
genre_facet |
Northwest Territories |
op_source |
Great Lakes Institute for Environmental Research Publications |
op_relation |
https://scholar.uwindsor.ca/glierpub/445 doi:10.1021/es0115060 https://doi.org/10.1021/es0115060 |
op_doi |
https://doi.org/10.1021/es0115060 |
container_title |
Environmental Science & Technology |
container_volume |
36 |
container_issue |
20 |
container_start_page |
4238 |
op_container_end_page |
4244 |
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1768372259740712960 |