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Factors Affecting Egg Diameter of White Suckers (Catostomus commersoni)

Lee A. Fuiman and John R. Trojnar
Copeia
Vol. 1980, No. 4 (Dec. 5, 1980), pp. 699-704
DOI: 10.2307/1444446
Stable URL: http://www.jstor.org/stable/1444446
Page Count: 6
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Factors Affecting Egg Diameter of White Suckers (Catostomus commersoni)
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Abstract

Water conductance, time after fertilization and female size (length and weight) were tested for their effect on diameter of Catostomus commersoni (Lacepede) eggs. Conductance was inversely related to egg diameter. A female effect was found in one experiment but not in the other. The relationship between female size and egg diameter was weak. Variability due to conductance was less than the natural variability found in field samples. Larger sizes were manifested in larger perivitelline spaces and attributable to higher ionic concentrations in the water.

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