Cardiorespiratory responses to haemolytic anaemia in rainbow trout Oncorhynchus mykiss.
To quantify cardiorespiratory response to experimental anaemia in rainbow trout Oncorhynchus mykiss, a 24 h phenylhydrazine treatment was used to reduce haematocrit to almost one third of its initial value over 4-5 days. In response, relative blood velocity in the ventral aorta (an index of cardiac output) progressively increased to more than double to its normocythaemic value and there was no significant change in routine oxygen uptake. Thus, the primary compensatory response to anaemia was an increase in cardiac output.
Department of Zoology and The Faculty of Land and Food Systems, University of British Columbia, 6270 University Blvd., Vancouver, BC, V6T 1Z4, Canada.
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Gold
Department of Zoology and The Faculty of Land and Food Systems, University of British Columbia, 6270 University Blvd., Vancouver, BC, V6T 1Z4, Canada.
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Loirat
Department of Zoology and The Faculty of Land and Food Systems, University of British Columbia, 6270 University Blvd., Vancouver, BC, V6T 1Z4, Canada.
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Farrell
D000743:Anemia, Hemolytic / Q000150:complications / Q000662:veterinary*; D000818:Animals; D001783:Blood Flow Velocity; D002302:Cardiac Output; D005393:Fish Diseases / Q000097:blood / Q000503:physiopathology*; D006400:Hematocrit; D017686:Oncorhynchus mykiss / Q000097:blood / Q000502:physiology*; D010659:Phenylhydrazines / Q000494:pharmacology
D010659:Phenylhydrazines; C030299:phenylhydrazine
cardiac output; cardiac stroke volume; haemoglobin; heart rate; oxygen uptake; phenylhydrazine