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Effects of body mass on physiological and anatomical parameters of mature salmon: evidence against a universal heart rate scaling exponent

Citation

Clark, TD and Farrell, AP, Effects of body mass on physiological and anatomical parameters of mature salmon: evidence against a universal heart rate scaling exponent, Journal of Experimental Biology, 214, (Part 6) pp. 887-893. ISSN 0022-0949 (2011) [Refereed Article]

DOI: doi:10.1242/jeb.051607

Abstract

The influence of body mass (M(b)) on the physiology of large, adult fish is poorly understood, in part because of the logistical difficulties of studying large individuals. For the first time, this study quantified the influence of M(b) on the resting heart rate (f(H)), blood properties and organ masses of adults of a large-growing fish species, the Chinook salmon (Oncorhynchus tshawytscha). Surgically implanted biologgers measured f(H) and acceleration activity in sexually mature, male fish ranging in M(b) from 2.7 to 16.8 kg while they roamed freely in a controlled water body at ∼8C. Blood parameters (at surgery and at death) and body organ masses (at death) were measured to investigate interrelationships with M(b). The scaling exponents for both f(H) and acceleration activity were not significantly different from zero. The lack of scaling of f(H) with M(b) contrasts with the situation for birds and mammals. All blood parameters were independent of M(b), while the masses of the compact myocardium, ventricle and spleen each scaled near-isometrically with M(b). These data raise the possibility that blood oxygen carrying capacity, mass-specific cardiac output and cardiac power output are maintained across M(b) in adult Chinook salmon. Biologging and biotelemetry should advance investigations into the effects of M(b) on the physiology and behaviour of large fish, where current knowledge lags far behind that of birds and mammals.

Item Details

Item Type:Refereed Article
Keywords:allometry, allometric, biologging, biotelemetry, cardiorespiratory, cardiovascular, Chinook salmon, data logging, Pacific salmonids, teleost fishes
Research Division:Biological Sciences
Research Group:Zoology
Research Field:Animal Behaviour
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Coastal and Estuarine Flora, Fauna and Biodiversity
UTAS Author:Clark, TD (Dr Timothy Clark)
ID Code:103408
Year Published:2011
Web of Science® Times Cited:17
Deposited By:IMAS Research and Education Centre
Deposited On:2015-10-08
Last Modified:2017-10-31
Downloads:0

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