Heart rate in spiders: influence of body size and foraging energetics

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Science  09 Jul 1976:
Vol. 193, Issue 4248, pp. 148-150
DOI: 10.1126/science.935864


Resting heart rates in 18 species of spiders as determined by a cool laser transillumination technique range from 9 to 125 beats per minute. Cardiac frequencies obtained in this fashion may readily serve as a measure of standard rates of metabolism. A spider's resting heart rate is a function of body size and of foraging energetics.