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A Hydrostatic Function of the Accessory Respiratory Organs in Air-breathing Fishes

Naturevolume 191pages396397 (1961) | Download Citation



ACCESSORY respiratory organs in fishes have generally been thought to be concerned with breathing atmospheric air1. That, like any other gas-filled space, they can also be connected with the perception of hydrostatic pressure has not been reported earlier. In fishes, perhaps the very existence of a swim-bladder, which takes the major role in regulating the density of the fish2 and functioning as a hydrostatic organ3, has diverted attention from other gas-filled organs which may have a similar function.

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    George, M. J., J. Zool. Soc. India, 8, 181 (1956).

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    Day, F., Fishes of India, 1 (William Dawson, London, 1958). Bridge, T. W., and Boulenger, G. A., Camb. Nat. Hist., 7, 302 (1958).

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  1. Department of Zoology, Aligarh Muslim University, Aligarh, U.P., India

    • S. Z. QASIM
    •  & R. HASAN


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