Hokanson et al, 1973


Hokanson, K.E.F. and McCormick, J.H. and Jones, B.R. and Tucker, J.H. (1973) Thermal requirements for maturation, spawning, and embryo survival of the brook trout, Salvelinus fontinalis. J. Fish. Res. Bd. Can., pp. 975-984

Associated characteristics

Species Development state Trait Primary Data Secondary Data
Salvelinus fontinalis Egg Temperature for incubation 6 [No hatch occurred at 18°C; The incidence of abnormalities was highest at 15°C] 6.0 °C
Salvelinus fontinalis Larvae Initial larval size Normal alevin incubated at 9°C measured 13 mm total length 13.0 mm
Salvelinus fontinalis Female Maximum GSI value Maturity indices were higher at 19 and 21 C since these fish did not spawn. The decoded-mean-maturity index (8.6) for female brook tout at 19C was derived from only three fish (0.5, 15.6, and 17.7) on November 7 the female maturity indices were 19.7 at 19°C and 16.2 at 21°C 19.0 percent
Salvelinus fontinalis Male Maximum GSI value Mean of 2.9 and 3.4 at 19 and 21°C respectively [November] 2.9 percent
Salvelinus fontinalis Spawning conditions Spawning season Begin on September, 28, reached its peal during October and early November ['September', 'October', 'November']
Salvelinus fontinalis Spawning conditions Spawning season Spawn in late August or in September in the northernmost pats of their range (60°N), and during November in the southernmost areas (35°N) ['August', 'September', 'November']
Salvelinus fontinalis Spawning conditions Spawning temperature 10-16 13.0 °C
Salvelinus fontinalis Spawning conditions Spawning release Females spawned an average of 2.7-3.4 times to deposit a total of 552-571 eggs each Total