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Cardiorespiratory responses to haemolytic anaemia in rainbow trout Oncorhynchus mykiss
Author(s) -
Gold D. K.,
Loirat T.,
Farrell A. P.
Publication year - 2015
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/jfb.12742
Subject(s) - rainbow trout , biology , cardiorespiratory fitness , hematocrit , medicine , cardiac output , zoology , endocrinology , fishery , fish <actinopterygii> , physiology , blood pressure
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.