Science 193: 148-50 (1976)
Heart rate in spiders: influence of body size and foraging energetics.
J. E. Carrel & R. D. Heathcote
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.