ISSN:
1573-5117
Keywords:
fish
;
heart rate
;
metabolism
;
telemetry
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Routine metabolic rate (RMR) and heart rate (HR) were measured simultaneously in 15 °C-acclimated and free swimming European sea bass (Dicentrarchus labrax L.) in normoxic and hypoxic conditions. The RMR fell within the boundaries previously reported for that species, i.e. the standard metabolic rate and the $${\text{LOC}}_{{\text{MO}}_2 }$$ -curve which describes the relationship between maximum sustainable oxygen consumption (MO2) and water oxygen concentration (CwO2). Heart rates values distributed below a LOCHR-curve which figures the relationship between the maximum HR and CwO2. A mathematical model describing this relationship is proposed. Using the $${\text{LOC}}_{{\text{MO}}_2 }$$ - and LOCHR-curves, the range of the correlated changes of HR and MO2 is delimited. The influence of CwO2 on these limits is also considered and discussed. Two examples illustrating the limiting effect of low ambient oxygenation level on fish metabolic demand are described.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1017078111916
