Abstract：
:A theoretical compartment model for the uptake of Cd and Zn by the freshwater crayfish, Procambarus acutus acutus (Girard), was constructed, and included a factorially designed experiment to study the relative importance of food and water as uptake vectors for 109Cd and 65 Zn. Food and water were important pathways for Cd accumulation and the two uptake vectors were first order, independent, and additive. The rate of Cd elimination was not significantly different from zero during either the uptake or depuration phases. Rate constants for uptake from 5 and 10 micrograms Cd . L-1, calculated on a concentration basis, were 0.84 +/- 0.031 and 0.83 +/- 0.029 day-1, respectively. Although there was not measurable Cd elimination, crayfish reached a steady state concentration of about 12.5 micrograms Cd . g-1, dry weight. A small amount of Zn was accumulated via food, relative to that accumulated from water; the former had a much longer retention time than the latter, which was lost rapidly. When Zn in food was the only source, steady state was reached rapidly; Zn accumulation from food and water was not additive. Zn accumulated from water, reached no steady state. Zn uptake was proportional to water concentrations within the fed treatment groups and those not fed Zn-contaminated food. Zn elimination was first order to Zn concentration in the crayfish. Rate constants for Zn accumulation from 50 and 100 micrograms Zn . L-1 when fed Zn-contaminated food were 1.34 +/- 0.064 and 1.46 +/- 0.073 day-1 (estimate +/- 95% CI based on concentration), respectively, while rate constants for Zn elimination were 0.034 +/- 0.0021 and 0.05 +/- 0.0032, respectively.
journal_name
Arch Environ Contam Toxicoljournal_title
Archives of environmental contamination and toxicologyauthors
Giesy JP,Bowling JW,Kania HJdoi
10.1007/BF01055544subject
Has Abstractpub_date
1980-01-01 00:00:00pages
683-97issue
6eissn
0090-4341issn
1432-0703journal_volume
9pub_type
杂志文章abstract：:Effect of sublethal treatment (20% and 60% of LC(50)/24 h) of plant-derived molluscicides, viz. Polianthes tuberosa, Trachyspermum ammi, Allium sativum powder; Azadirachta indica oil; oleoresin of Zingiber officinale; and their active molluscicidal component in combination (1:5) with MGK-264 or piperonyl butoxide on t...
journal_title：Archives of environmental contamination and toxicology
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doi：10.1007/s002449910024
更新日期：2000-02-01 00:00:00
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journal_title：Archives of environmental contamination and toxicology
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doi：10.1007/s00244-007-9030-4
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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doi：10.1007/s00244-006-0113-4
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journal_title：Archives of environmental contamination and toxicology
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更新日期：1999-11-01 00:00:00
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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更新日期：2012-11-01 00:00:00
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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doi：10.1007/s002449900249
更新日期：1997-10-01 00:00:00
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
doi：10.1007/s00244-001-0020-7
更新日期：2002-04-01 00:00:00
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
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更新日期：1998-01-01 00:00:00
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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
doi：10.1007/BF01054986
更新日期：1990-05-01 00:00:00
abstract：:Mercury (Hg) biomonitoring of pinnipeds increasingly utilizes nonlethally collected tissues such as hair and blood. The relationship between total Hg concentrations ([THg]) in these tissues is not well understood for marine mammals, but it can be important for interpretation of tissue concentrations with respect to ec...
journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
doi：10.1007/s00244-015-0174-3
更新日期：2016-01-01 00:00:00
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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
doi：10.1007/s00244-014-0103-x
更新日期：2015-04-01 00:00:00
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journal_title：Archives of environmental contamination and toxicology
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doi：10.1007/BF00203811
更新日期：1992-11-01 00:00:00
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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
doi：10.1007/s00244-015-0152-9
更新日期：2015-08-01 00:00:00
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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
doi：10.1007/s002449910054
更新日期：2000-05-01 00:00:00
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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
doi：10.1007/s00244-014-9998-5
更新日期：2014-04-01 00:00:00
abstract：:Contaminants entering aquatic systems from agricultural, industrial, and municipal activities are generally sequestered in bottom sediments. The environmental significance of contaminants associated with sediments dredged from Savannah Harbor, Georgia, USA, are unknown. To evaluate potential effects of contaminants in...
journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
doi：10.1007/s002449910016
更新日期：2000-01-01 00:00:00
