Abstract：
:Behavioural responses are linked to complex biochemical and physiologic changes and may act as sensitive indicators of the sublethal effects of pollutants. This article investigates changes in the locomotor activity rhythms of the amphipod Gammarus aequicauda exposed to cadmium (Cd) as a model to study the effect of pollutants on an ecologically important species. Under a 12:12 h light-to-dark cycle, G. aequicauda showed a strict nocturnal rhythm, with 90.2±0.4% of their total daily activity occurring during the night. Under constant darkness, circadian rhythms persisted for 10 days, with a mean periodicity of 24.32 h, thus confirming endogenous control. Exposure to sublethal concentrations of Cd (0.16, 0.20, 0.24, and 0.28 mg l(-1)) did not change the nocturnal activity patterns of G. aequicauda, although their swimming activity during the night was significantly decreased by exposure to concentrations of 0.24 and 0.28 mg Cd l(-1). In conclusion, locomotor activity bioassays using the amphipod G. aequicauda appeared to be a sensitive indicator of Cd contamination, and sensitivity and tolerance to Cd in short-term bioassays may depend on the time of the day tests are carried out. These results provide further support for the idea that behavioural end points in amphipods are useful indicators of pollutant exposure and that future studies should take circadian rhythms into consideration.
journal_name
Arch Environ Contam Toxicoljournal_title
Archives of environmental contamination and toxicologyauthors
Morillo-Velarde PS,Lloret J,Marín A,Sánchez-Vázquez FJdoi
10.1007/s00244-010-9563-9subject
Has Abstractpub_date
2011-04-01 00:00:00pages
444-51issue
3eissn
0090-4341issn
1432-0703journal_volume
60pub_type
杂志文章abstract：:Applications of pesticides in areas of agricultural production have been an environmental concern for the past several decades. Varying-sized watersheds draining regions of intense agriculture in the Maritime Provinces of Canada were monitored between 2003 and 2007 to determine the major in-use pesticides and to gain ...
journal_title：Archives of environmental contamination and toxicology
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doi：10.1007/s00244-012-9789-9
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journal_title：Archives of environmental contamination and toxicology
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doi：10.1007/s00244-007-9102-5
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doi：10.1007/s00244-015-0159-2
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journal_title：Archives of environmental contamination and toxicology
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doi：10.1007/s00244-005-0071-2
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doi：10.1007/BF00212802
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journal_title：Archives of environmental contamination and toxicology
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doi：10.1007/s00244-004-2295-y
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journal_title：Archives of environmental contamination and toxicology
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doi：10.1007/s002449900467
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journal_title：Archives of environmental contamination and toxicology
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更新日期：2005-01-01 00:00:00
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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
doi：10.1007/BF00203907
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pub_type： 杂志文章
doi：10.1007/BF01055620
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pub_type： 杂志文章
doi：10.1007/s00244-017-0437-2
更新日期：2018-01-01 00:00:00
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pub_type： 杂志文章
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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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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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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
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更新日期：1992-11-01 00:00:00
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journal_title：Archives of environmental contamination and toxicology
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更新日期：2017-11-01 00:00:00
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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：2017-07-01 00:00:00
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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
doi：10.1007/s00244-003-0156-8
更新日期：2003-11-01 00:00:00
