Radiocaesium elimination in fish: variation among and within species

Radiocaesium elimination in fish: variation among and within species SUMMARY 1 1. Ecotoxicological models used to assess the effects of radionuclides on freshwater ecosystems and the potential transfer to humans depend on accurate laboratory estimates of the elimination rate of radionuclides in fish. 2 We determined experimentally the elimination rate (excretion) of caesium (134Cs) of Atlantic salmon Salmo salar (two populations), Arctic charr Salvelinus alpinus (two populations), whitefish Coregonus lavaretus and bream Abramis brama by single‐dose caesium labelling and measures of subsequent samples of groups of fish maintained at different temperatures. Elimination rates between populations of the same species and among species were compared. 3 3. Populations of the same species from similar thermal environments had similar elimination rates (Atlantic salmon) whereas those from different thermal environments differed significantly (Arctic charr). 4 Caesium elimination rates varied among fish species. Bream had slower elimination rates than the other species at all temperatures, whereas Atlantic salmon had quicker elimination rates than the others at 16 °C. The remaining differences among species were not consistent across temperatures, indicating differences in thermal performance. 5 Approximately 45% of the estimated elimination rates differed significantly from those predicted by a general caesium elimination model. We conclude that a single model for caesium elimination, valid for a wide range of species and populations, may be difficult to attain. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Ecology Wiley

Radiocaesium elimination in fish: variation among and within species

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Publisher
Wiley
Copyright
Copyright © 1998 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0021-8901
eISSN
1365-2664
D.O.I.
10.1111/j.1365-2664.1998.tb00003.x
Publisher site
See Article on Publisher Site

Abstract

SUMMARY 1 1. Ecotoxicological models used to assess the effects of radionuclides on freshwater ecosystems and the potential transfer to humans depend on accurate laboratory estimates of the elimination rate of radionuclides in fish. 2 We determined experimentally the elimination rate (excretion) of caesium (134Cs) of Atlantic salmon Salmo salar (two populations), Arctic charr Salvelinus alpinus (two populations), whitefish Coregonus lavaretus and bream Abramis brama by single‐dose caesium labelling and measures of subsequent samples of groups of fish maintained at different temperatures. Elimination rates between populations of the same species and among species were compared. 3 3. Populations of the same species from similar thermal environments had similar elimination rates (Atlantic salmon) whereas those from different thermal environments differed significantly (Arctic charr). 4 Caesium elimination rates varied among fish species. Bream had slower elimination rates than the other species at all temperatures, whereas Atlantic salmon had quicker elimination rates than the others at 16 °C. The remaining differences among species were not consistent across temperatures, indicating differences in thermal performance. 5 Approximately 45% of the estimated elimination rates differed significantly from those predicted by a general caesium elimination model. We conclude that a single model for caesium elimination, valid for a wide range of species and populations, may be difficult to attain.

Journal

Journal of Applied EcologyWiley

Published: Dec 1, 1998

References

  • Countergradient variation in growth rate: compensation for length of the growing season among Atlantic silversides from different latitudes
    Conover, Conover; Present, Present
  • Migration, growth and survival of wild and hatchery‐reared anadromous Arctic charr (Salvelinus alpinus) in Finnmark, northern Norway
    Finstad, Finstad; Heggberget, Heggberget
  • Variation in digestive performance between geographically disjunct populations of Atlantic salmon: countergradient in passage time and digestion rate
    Nicieza, Nicieza; Reiriz, Reiriz; Braña, Braña
  • A functional model of radiocesium turnover in brown trout
    Ugedal, Ugedal; Forseth, Forseth; Jonsson, Jonsson
  • Effects of temperature and body size on radiocaesium retention in brown trout, Salmo trutta
    Ugedal, Ugedal; Jonsson, Jonsson; Njåstad, Njåstad; Næumann, Næumann

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