Blanchfield and Ridgway, 1997



Citation


Blanchfield, P.J. and Ridgway, M.S. (1997) Reproductive timing and use of redd sites by using lake-spawning brrok trout (Salvelinus fontinalis). Can. J. Fish Aquat. Sci., pp. 747-756

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Salvelinus fontinalis Spawning conditions Nycthemeral period of oviposition We observed spawning at all times of the day throughout both seasons, with a distinct peak in activity between 13:00 and 14:00. Eighthy-nine percent of all spawning toook place during the hours of daily observation (09:00-18:00), the remaining spawnings occured either just prior to our arrival (3%) or sometime after our departure (8%) Day
Salvelinus fontinalis Spawning conditions Spawning temperature During peak spawning periods, water temperature in the spawning area decreased from 11.3 to 8.8°C in 1994 and from 10.3 to 5.9°C in 1995 11.3 °C
Salvelinus fontinalis Spawning conditions Spawning period duration 3-4: The seasonal peak in spawning activity: 1994, days 296-310, 1995, days 296-312 coincided with peak counts of males and females [Brook trout were observed on or near the spanwing grounds over a 64-d period in 1994 (30 September to 2 December) and a 61-d period in 1995 (25 September to 24 November). Peak number of males and females occured approximatively the same time, between 22 Ocotber to 8 November. The duration of time spent on the spawning grounds was longer for males in 1994 than in 1995 (31 ± 12 and 22 ± 9 d, respectively), although no difference was observed for females between years (11 ± 6 and 15 ± 7, respectively).] 31.0 weeks
Salvelinus fontinalis Spawning conditions Spawning depth Redds were located in the shallow littoral zone (1994, 1± 0.4 m, 1995, 1.6 ± 0.5 m) and near shore 1.0 m
Salvelinus fontinalis Spawning conditions Spawning season Brook trout were observed on or near the spanwing grounds over a 64-d period in 1994 (30 September to 2 December) and a 61-d period in 1995 (25 September to 24 November) ['November', 'December', 'September']
Salvelinus fontinalis Female Weight at sexual maturity Spawning females were: in 1994, n=45, 656 ±395 g, in 1995, n=42, 705 ± 381 g 656.0 kg
Salvelinus fontinalis Female Length at sexual maturity Spawning females were: in 1994, n=47, 37.2 ±6.5, in 1995, n=42, 37.6 ± 6.4 37.2 cm
Salvelinus fontinalis Male Length at sexual maturity Spawning females were: in 1994, n=50, 33.4 ±7.7, in 1995, n=65, 33.7 ± 6.5 33.4 cm
Salvelinus fontinalis Male Weight at sexual maturity Spawning females were: in 1994, n=48, 480 ±407 g, in 1995, n=63, 507 ± 351 g 480.0 kg
Salvelinus fontinalis Spawning conditions Parity Iteroparous Iteroparous