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Sex ratios and lengths of adult sea lampreys (Petromyzon marinus) from a Lake Ontario tributary
Journal article   Peer reviewed

Sex ratios and lengths of adult sea lampreys (Petromyzon marinus) from a Lake Ontario tributary

I.C. Potter, F.W.H. Beamish and B.G.H. Johnson
Journal of the Fisheries Research Board of Canada, Vol.31(1), pp.122-124
1974
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Abstract

The mean lengths of adult males and females of the sea lamprey (Petromyzon marinus) migrating into the Humber River from Lake Ontario in each of the years 1968–1972 varied little, and were similar to those found by other workers in recently established populations in the upper lakes. In contrast, the ratio of males to females, which lay within the narrow range of 1:1 to 1.26:1, was similar to those reported for long-established populations.

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