Die Grössenabhängigkeit der Herzfrequenz von Krebsen im Vergleich zu anderen Tiergruppen

Abstract

Pulse frequencies for several species of crayfish were collected over a range of body weight from 10−5–103 g. Pulse rate varies in crayfish as (body weight)−0,12; the size of the animal therefore influences the pulse rate much less than in warm blooded vertebrata, but in the same degree as in some mollusca. It is supposed that the similarity between crayfish, snails and mussels is related to their open circulatory system.