Document Detail

Effects of temperature, and dietary magnesium and nickel levels on magnesium and nickel concentrations during the moult-cycle in Oniscus asellus (Porcellionidae, Isopoda, Crustacea).
MedLine Citation:
PMID:  1692685     Owner:  NLM     Status:  MEDLINE    
Mean magnesium concentrations in intermoult Oniscus asellus, caged at 20 degrees C for 10 days, ranged from 1,059.15 +/- 51.9 ppm on diets containing 10 ppm nickel, to 6,827.6 +/- 314.1 ppm on a mixture of 500 ppm magnesium + 10 ppm nickel. Mean nickel concentrations ranged from 89.4 +/- 4.3 ppm on diets containing 500 ppm magnesium, to 314.0 +/- 14.8 ppm on a mixture of 500 ppm magnesium + 10 ppm nickel. At 30 degrees C, magnesium tissue concentrations ranged from 4,149.8 +/- 153.5 ppm on diets with 10 ppm nickel to 12,602.6 +/- 529.3 ppm on 500 ppm magnesium. Nickel concentrations at 30 degrees C varied from 156.8 +/- 6.7 in isopods in the control to 490.5 +/- 23.5 ppm on those on 500 ppm magnesium + 10 ppm nickel. Magnesium in intermoult isopods was mainly stored in other tissues, including the exoskeleton, and nickel in the hepatopancreas. Differences in both magnesium and nickel concentrations between males and females were not significant. Magnesium and nickel concentrations in postmoult isopods, on the average, amounted to 367.6 +/- 16.5 ppm and 18.7 +/- 0.7 ppm, respectively, at 20 degrees C, and 369.9 +/- 16.3 ppm and 30.9 +/- 1.3 ppm, respectively, at 30 degrees C. Differences between males and females, and between various treatments were not significant at P greater than 0.01. It is suggested that both hepatopancreas and other tissues, including the exoskeleton, are used as sinks to get rid of excessive tissue magnesium and nickel during the moult-cycle.
M A Alikhan
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Archives internationales de physiologie et de biochimie     Volume:  98     ISSN:  0003-9799     ISO Abbreviation:  Arch. Int. Physiol. Biochim.     Publication Date:  1990 Mar 
Date Detail:
Created Date:  1990-06-20     Completed Date:  1990-06-20     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0405355     Medline TA:  Arch Int Physiol Biochim     Country:  BELGIUM    
Other Details:
Languages:  eng     Pagination:  11-8     Citation Subset:  IM    
Department of Biology, Laurentian University, Sudbury, Ontario.
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MeSH Terms
Crustacea / growth & development,  metabolism*
Environmental Pollutants / metabolism,  toxicity
Liver / metabolism*
Magnesium / metabolism*,  pharmacology
Nickel / metabolism*,  toxicity
Reg. No./Substance:
0/Environmental Pollutants; 7439-95-4/Magnesium; 7440-02-0/Nickel

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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