Fraser, 1985



Citation


Fraser, J.M. (1985) Shoal spawning of brook trout, Salvelinus fontinalis, in a Precambrian shield lake. Naturaliste Canadien., pp. 163-174

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Salvelinus fontinalis Egg Oocyte diameter 4.8-4.9 4.85 mm
Salvelinus fontinalis Egg Incubation time About 100 in natural conditions 100.0 days
Salvelinus fontinalis Larvae Initial larval size 20.4 ± 0.3 [Newly-hatched larvae, but not sure to be the size at hatching !] 20.4 mm
Salvelinus fontinalis Larvae Larvae behaviour After hatcing, alevins remain in the gravel, deriving nourishment from their yolk sacas until March, when they emerge as new fry Demersal
Salvelinus fontinalis Female Age at sexual maturity Mostly 3-4, few at 2 [Both sex] 3.5 year
Salvelinus fontinalis Female Length at sexual maturity Mean 41, range 29.5-53.3 [Both sex] 41.4 cm
Salvelinus fontinalis Female Absolute fecundity Mean 2.3, range 0.8-3.8 2.3 thousand eggs
Salvelinus fontinalis Male Age at sexual maturity Mostly 3-4, few at 2 [Both sex] 3.5 years
Salvelinus fontinalis Male Length at sexual maturity Mean 41, range 29.5-53.3 [Both sex] 41.4 cm
Salvelinus fontinalis Spawning conditions Homing Tag recaptures from fish tagged several years suggest that brrok trout spawn each year at the same spawning bed Present
Salvelinus fontinalis Spawning conditions Spawning season October-November ['October', 'November']
Salvelinus fontinalis Spawning conditions Spawning period duration 4-5 [From Mid-October to end of November, Males apparently spent a longer period of time on the spawning area, probably 15-20 days, while females seldom seen on the bed more than 10 days after their first appeareance] 4.5 weeks
Salvelinus fontinalis Spawning conditions Spawning depth The depth of the water is mostly 50-75 cm, but can fluctuate up to 15 cm during the spawning season, and as much as 30 cm at other times of the season 62.5 m
Salvelinus fontinalis Spawning conditions Spawning substrate Gravel-sand shoal that extends about 25 m from shore Lithophils
Salvelinus fontinalis Spawning conditions Parity Tag recaptures from fish tagged several years suggest that brrok trout spawn each year at the same spawning bed No category