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Effects of in vivo and in vitro changes in on the deformability of red blood cells of rainbow trout (Salmo gairdneri R.)
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| Zeitschriftentitel: | Journal of Experimental Biology |
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| Personen und Körperschaften: | , |
| In: | Journal of Experimental Biology, 111, 1984, 1, S. 253-257 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
The Company of Biologists
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| Schlagwörter: |
| Zusammenfassung: | <jats:title>ABSTRACT</jats:title> <jats:p>Changes in haematocrit value are known to occur during hypoxia of rainbow trout and this has sometimes been interpreted as a result of an increase in red cell volume which is observed in vitro following equilibration with gas mixtures of low P02 (Black & Irving, 1938; Soivio, Westman & Nyholm, 1974). The possibility that there is also an increase in red cell number is still under discussion (Thomas & Hughes, 1982). The rise in blood haemoglobin content associated with such an increase would have physiological advantages for oxygen transport. However, an increase in haematocrit may increase resistance to blood flow and could impair the supply of oxygen at the tissue level. It is of interest, therefore, to know what are the effects of hypoxia both environmentally induced and under in vitro conditions on the flow properties of fish blood, for such effects have received little attention. This paper summarizes measurements of red cell deformability following changes from normoxic to hypoxic conditions, both in vivo and in vitro. A technique of filtration through a Nuclepore membrane has been used to provide an index of red cell deformability. During studies on yellowtail blood (Hughes, Kikuchi & Watari, 1982) variability in red cell deformability appeared to depend upon conditions of sampling and differences were observed in the filtration time of blood samples from normoxic and asphyxic fish. This effect has now been studied under more controlled conditions in rainbow trout.</jats:p> |
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| Umfang: | 253-257 |
| ISSN: |
0022-0949
1477-9145 |
| DOI: | 10.1242/jeb.111.1.253 |