Spawning time and fecundity of Northern Redbelly Dace, Phoxinus eos, Finescale Dace, Phoxinus neogaeus, and their hybrids in Upper Pierre Grey Lake, Alberta

Abstract

Spawning in Northern Redbelly Dace, Finescale Dace, and their hybrids extends from about mid-June to late July at temperatures ranging from 13.0° to 18.0°C in Upper Pierre Grey Lake, Alberta. The relationship of fecundity with lengthand weight was similar in the two parental species andjhe hybrids. Diameter of the fully ripe eggs is about 0.91- 1.24(X = 1.11) mm in Northern Redbelly Dace, 1.24-1.50 (X=_1.37) mm in Finescale Dace, and 0.92-1.58 (X= 1.26) mmin the hybrids. The number of eggs ranged from 146-1030 (X= 654) in Northern Redbelly Dace, 406-830(X = 565) in Finescale Dace, and 292-1716 (X= 730) in the hybrids.