Time trends of chemical contaminant levels in Canadian Atlantic cod with several biological variables
Investigation of time trends in contaminant levels has been one of the highest priority tasks within the International Council for the Exploration of the Sea (ICES). Univariate procedures of analysing for temporal variations (provided in the ICES guidelines) are of severely restricted scope. Additio...
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Veröffentlicht in: | Marine pollution bulletin 1989, Vol.20 (5), p.227-232 |
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container_title | Marine pollution bulletin |
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creator | Misra, R.K. Uthe, J.F. Scott, D.P. Chou, C.L. Musial, C.J. |
description | Investigation of time trends in contaminant levels has been one of the highest priority tasks within the International Council for the Exploration of the Sea (ICES). Univariate procedures of analysing for temporal variations (provided in the ICES guidelines) are of severely restricted scope. Additional problems, which arise due to multicollinearity when two or more covariates are used, are identified. A procedure which has a more extended scope than the univariate one and which overcomes the multicollinearity situation is presented. Canadian Atlantic cod (
Gadus morhua) data of the eight-year period, 1977–1985, are analysed for time trends by this procedure. Whereas the true mathematical form of temporal variations was not identifiable and will require additional time points, linear trends were significant and provided an effective description of these variations. |
doi_str_mv | 10.1016/0025-326X(89)90436-0 |
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Gadus morhua) data of the eight-year period, 1977–1985, are analysed for time trends by this procedure. Whereas the true mathematical form of temporal variations was not identifiable and will require additional time points, linear trends were significant and provided an effective description of these variations.</description><subject>Agnatha. Pisces</subject><subject>Animal, plant and microbial ecology</subject><subject>Applied ecology</subject><subject>Biological and medical sciences</subject><subject>Ecotoxicology, biological effects of pollution</subject><subject>Effects of pollution and side effects of pesticides on vertebrates</subject><subject>Fundamental and applied biological sciences. 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source | Elsevier ScienceDirect Journals Complete |
subjects | Agnatha. Pisces Animal, plant and microbial ecology Applied ecology Biological and medical sciences Ecotoxicology, biological effects of pollution Effects of pollution and side effects of pesticides on vertebrates Fundamental and applied biological sciences. Psychology Gadus morhua Marine |
title | Time trends of chemical contaminant levels in Canadian Atlantic cod with several biological variables |
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