Abstract
IT is known that the coregonids do not possess a counter-current system in the vascularization of the swim-bladder. In his classical work Hüfner1 showed that C. acronius has a gas content in the swim-bladder consisting mainly of nitrogen—some 99 per cent. This was later verified by others2–4 on C. acronius and related species.
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References
Hüfner, G., Arch. Anat. Physiol. Lpz. Physiol. Abth. (1892).
Saunders, R. L., Canad. J. Zool., 31, 547 (1953).
Scholander, P. F., Van Dam, and Enns, T., Science, 123, 59 (1956).
Sundnes, G., Enns, T., and Scholander, P. F., J. Exp. Biol., 35, 671 (1958).
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SUNDNES, G. Gas Secretion in Coregonids. Nature 183, 986–987 (1959). https://doi.org/10.1038/183986a0
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DOI: https://doi.org/10.1038/183986a0
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