The uptake, accumulation and retention of 137-caesium by salmonid fish in fresh water
The Chernobyl disaster on 26ih April 1986, caused contamination over much of the U.K. with radiocaesium, principally via rainfall in upland areas such as N. Wales and S.W. Scotland. 137-Caesium was of particular concern in the freshwater environment as it has a long physical half-life (30yr) and pre...
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University of Stirling
1992
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ftunivstirling:oai:dspace.stir.ac.uk:1893/29414 2023-05-15T15:32:11+02:00 The uptake, accumulation and retention of 137-caesium by salmonid fish in fresh water Morgan, Ian James 1992 application/pdf http://hdl.handle.net/1893/29414 http://dspace.stir.ac.uk/bitstream/1893/29414/1/Morgan.pdf en eng University of Stirling http://hdl.handle.net/1893/29414 http://dspace.stir.ac.uk/bitstream/1893/29414/1/Morgan.pdf Salmonidae Effect of water pollution on Testing Thesis or Dissertation Doctoral Doctor of Philosophy 1992 ftunivstirling 2022-06-13T18:43:56Z The Chernobyl disaster on 26ih April 1986, caused contamination over much of the U.K. with radiocaesium, principally via rainfall in upland areas such as N. Wales and S.W. Scotland. 137-Caesium was of particular concern in the freshwater environment as it has a long physical half-life (30yr) and previous studies had shown that 137-caesium accumulated in freshwater animals and that the levels of accumulation increased with trophic level up the food chain. This thesis presents the results of studies on the uptake, accumulation and retention of 137-caesium in salmonid fish in fresh water. A number of previous studies both m vitro and in vivo have observed biochemical similarities of caesium to potassium. The uptake of 137-caesium and 86- rubidium (as a tracer for potassium) by erythrocytes of the rainbow trout (Oncorhynchus mykiss Walbaum) was studied. The total caesium influx was much smaller than that of potassium ( 14.4 and 796.0nmoles min ' ml ' packed cells respectively), at an external concentration of .3mM. Potassium influx was significantly inhibited by caesium and vice versa, at concentrations >0.1 mM. The results indicated that caesium behaved as potassium in a qualitative but not quantative manner. This conclusion, together with evidence from the literature, was used to justify biochemical compansons of the two elements later in the thesis. The accumulation of 137-caesium was studied in the early stages of development of Atlantic salmon {Saimo salar L.) and brown trout {.Salmo trutta L.). The accumulation of the isotope in the eggs of brown trout was relatively small until a few days prior to hatching, when the 137-caesium concentration factor (C F.) increased rapidly. The accumulation of 137-caesium in juveniles of Atlantic salmon and brown trout followed a first order rate equation, ie. the rate of increase of accumulation decreased until a constant, equilibrium C.F. was reached. 137-Caesium accumulated several times above the concentration in water, reaching equilibrium after 4-6 months at C.F.s of ... Doctoral or Postdoctoral Thesis Atlantic salmon University of Stirling: Stirling Digital Research Repository |
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University of Stirling: Stirling Digital Research Repository |
op_collection_id |
ftunivstirling |
language |
English |
topic |
Salmonidae Effect of water pollution on Testing |
spellingShingle |
Salmonidae Effect of water pollution on Testing Morgan, Ian James The uptake, accumulation and retention of 137-caesium by salmonid fish in fresh water |
topic_facet |
Salmonidae Effect of water pollution on Testing |
description |
The Chernobyl disaster on 26ih April 1986, caused contamination over much of the U.K. with radiocaesium, principally via rainfall in upland areas such as N. Wales and S.W. Scotland. 137-Caesium was of particular concern in the freshwater environment as it has a long physical half-life (30yr) and previous studies had shown that 137-caesium accumulated in freshwater animals and that the levels of accumulation increased with trophic level up the food chain. This thesis presents the results of studies on the uptake, accumulation and retention of 137-caesium in salmonid fish in fresh water. A number of previous studies both m vitro and in vivo have observed biochemical similarities of caesium to potassium. The uptake of 137-caesium and 86- rubidium (as a tracer for potassium) by erythrocytes of the rainbow trout (Oncorhynchus mykiss Walbaum) was studied. The total caesium influx was much smaller than that of potassium ( 14.4 and 796.0nmoles min ' ml ' packed cells respectively), at an external concentration of .3mM. Potassium influx was significantly inhibited by caesium and vice versa, at concentrations >0.1 mM. The results indicated that caesium behaved as potassium in a qualitative but not quantative manner. This conclusion, together with evidence from the literature, was used to justify biochemical compansons of the two elements later in the thesis. The accumulation of 137-caesium was studied in the early stages of development of Atlantic salmon {Saimo salar L.) and brown trout {.Salmo trutta L.). The accumulation of the isotope in the eggs of brown trout was relatively small until a few days prior to hatching, when the 137-caesium concentration factor (C F.) increased rapidly. The accumulation of 137-caesium in juveniles of Atlantic salmon and brown trout followed a first order rate equation, ie. the rate of increase of accumulation decreased until a constant, equilibrium C.F. was reached. 137-Caesium accumulated several times above the concentration in water, reaching equilibrium after 4-6 months at C.F.s of ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Morgan, Ian James |
author_facet |
Morgan, Ian James |
author_sort |
Morgan, Ian James |
title |
The uptake, accumulation and retention of 137-caesium by salmonid fish in fresh water |
title_short |
The uptake, accumulation and retention of 137-caesium by salmonid fish in fresh water |
title_full |
The uptake, accumulation and retention of 137-caesium by salmonid fish in fresh water |
title_fullStr |
The uptake, accumulation and retention of 137-caesium by salmonid fish in fresh water |
title_full_unstemmed |
The uptake, accumulation and retention of 137-caesium by salmonid fish in fresh water |
title_sort |
uptake, accumulation and retention of 137-caesium by salmonid fish in fresh water |
publisher |
University of Stirling |
publishDate |
1992 |
url |
http://hdl.handle.net/1893/29414 http://dspace.stir.ac.uk/bitstream/1893/29414/1/Morgan.pdf |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_relation |
http://hdl.handle.net/1893/29414 http://dspace.stir.ac.uk/bitstream/1893/29414/1/Morgan.pdf |
_version_ |
1766362681120391168 |