On the Receptor Function of the Swim Bladder of Fishes

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Abstract
In spite of extensive investigation of the function of the swim bladder of fishes, our knowledge of the physiological role of this organ is far from complete. Two functions are usually ascribed to the swim bladder, viz. a participation in the co-ordination of the movements of fishes, and a participation in the act of breathing. Recent research has made it evident that the secretion of gas by those fishes which possess a red body in their bladder and the introduction of air into the bladder of those which have no red body provide stimuli which are capable of modifying to a marked degree the locomotory responses of the animals. The present paper constitutes an attempt to investigate the physiological mechanism by means of which the swim bladder performs this role.

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