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Circulatory and ionoregulatory effects of atrial natriuretic peptide on rainbow trout (Salmo gairdneri Richardson) fed normal or high levels of dietary salt

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Abstract

Rainbow trout fed a normal salt diet (1.3% NaCl) or a high salt diet (12% NaCl for at least 6 months) were chronically cannulated in the dorsal aorta and received 10 μg kg−1 ANP (1–28 human, UBC-Bioproducts) infused over a 10 min period. This had an insignificant influence on sodium balance, blood electrolytes and branchial sodium fluxes. In fish given a normal diet, the blood pressure and heart rate were uninfluenced by ANP, but pulse pressure was reduced by on average 60% and in some cases was not evident at all. Blood pressure in the fish fed a high salt diet was significantly higher than in the control fish; this together with heart rate and pulse pressure was not affected by ANP administration.

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Authors and Affiliations

  1. Department of Biological Sciences, University of Dundee, Dundee, DDI 4HN, Scotland

    F. B. Eddy & N. F. Smith

  2. Department of Biology and Preclinical Medicine, University of St. Andrews, St. Andrews, Fife, KY16 8LB, Scotland

    N. Hazon & C. Grierson

Authors
  1. F. B. Eddy
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  2. N. F. Smith
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  3. N. Hazon
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  4. C. Grierson
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Eddy, F.B., Smith, N.F., Hazon, N. et al. Circulatory and ionoregulatory effects of atrial natriuretic peptide on rainbow trout (Salmo gairdneri Richardson) fed normal or high levels of dietary salt. Fish Physiol Biochem 8, 321–327 (1990). https://doi.org/10.1007/BF00003427

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  • DOI: https://doi.org/10.1007/BF00003427

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