|
| |
|
|
|
|
||||
| Home Help Feedback Subscriptions Archive Search Table of Contents | ||||
Renin, Atrial Natriuretic Peptide and Blood Plasma Ions in Parr and Smolts of Atlantic Salmon Salmo Salar L. and Rainbow Trout Oncorhynchus Mykiss (Walbaum) in Fresh Water and After Short-Term Exposure to Sea Water
1 Department of Biological Sciences, University of Dundee Dundee, DD1 4HN; Wessex Water Authority, Rivers House, Lower Bristol Road, Bath BA2 9ES
2 Department of Biological Sciences, University of Dundee Dundee, DD1 4HN
3 Department of Pharmacology and Clinical Pharmacology, Ninewells Hospital and Medical School Dundee
4 Freshwater Fisheries Laboratory Pitlochry, Perthshire, PH16 5LB
To whom correspondence and reprint requests should be addressed.
Freshwater Atlantic salmon (Salmo salar L.) smolts were abruptly transferred to sea water in May and over 3 days blood plasma ion concentrations were determined together with atrial natriuretic peptide (ANP) and plasma renin activity (PRA) using antibodies raised against human ANP and angiotensin I. Blood plasma Na+ and Cl- levels in smolts increased and, between 24 and 72 h, PRA increased significantly to 0.9 ng ml-1 h-1, while there was a gradual rise in ANP levels to 10 pmol l-1 at 72 h. Similar measurements were made on parr transferred to sea water in September; in these fish Na+ and Cl- levels increased as in smolts, PRA remained unchanged at about 0.6 ng ml-1 h-1 and ANP levels increased significantly to about 20pmoll-1 at 24 and 72 h. After 2h in sea water parr showed wide variability in ANP levels, in keeping with circulatory stress, hypoxia and increased atrial stretching. Parr transferred to sea water in December showed low drinking rates of 1.95 ml kg-1 h-1, even after 20 days, compared to a high drinking rate of about 7 ml kg-1 h-1 reported for smolts transferred in May.
Rainbow trout acclimated to sea water for 3 weeks showed elevated levels of both ANP and PRA, similar to values reported for marine species. Freshwater rainbow trout fed a high-salt diet (12% NaCl) showed significantly elevated levels of ANP compared to fish fed a normal diet (1.5 % NaCl), while PRA levels were depressed, though not significantly.
Key words: renin, ANP, juvenile salmon, seawater transfer, Salmo salar, Oncorhynchus mykiss
Accepted on January 28, 1991
This article has been cited by other articles:
|
|
 |
|
  P. M. Craig, H. Al-Timimi, and N. J. Bernier Differential Increase in Forebrain and Caudal Neurosecretory System Corticotropin-Releasing Factor and Urotensin I Gene Expression Associated with Seawater Transfer in Rainbow Trout Endocrinology, September 1, 2005; 146(9): 3851 - 3860. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 D. H. Evans, P. M. Piermarini, and K. P. Choe The Multifunctional Fish Gill: Dominant Site of Gas Exchange, Osmoregulation, Acid-Base Regulation, and Excretion of Nitrogenous Waste Physiol Rev, January 1, 2005; 85(1): 97 - 177. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 V. Tervonen, H. Ruskoaho, T. Lecklin, M. Ilves, and O. Vuolteenaho Salmon cardiac natriuretic peptide is a volume-regulating hormone Am J Physiol Endocrinol Metab, August 1, 2002; 283(2): E353 - E361. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 W. G. Anderson, Y. Takei, and N. Hazon Osmotic and volaemic effects on drinking rate in elasmobranch fish J. Exp. Biol., April 15, 2002; 205(8): 1115 - 1122. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 Y. Takei and S. Hirose The natriuretic peptide system in eels: a key endocrine system for euryhalinity? Am J Physiol Regulatory Integrative Comp Physiol, April 1, 2002; 282(4): R940 - R951. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
Y. Takei and T. Tsuchida Role of the renin-angiotensin system in drinking of seawater-adapted eels Anguilla japonica: a reevaluation Am J Physiol Regulatory Integrative Comp Physiol, September 1, 2000; 279(3): R1105 - R1111. [Abstract] [Full Text] [PDF]
|
|
