Wallace and Aasjord, 1984



Citation


Wallace, J.C. and Aasjord, D. (1984) The initial feeding of Arctic charr, Salvelinus alpinus (L.) alevins at different temperatures and under different feeding regimes. Aquaculture, pp. 19-33

Associated characteristics


Species Development state Trait Primary Data Secondary Data
Salvelinus alpinus Egg Temperature for incubation Egg were incubated at about 3°C 3.0 °C
Oncorhynchus mykiss Larvae Temperature during larval development It is relevant to note that a temperature of at least 7-8°C is reported as being necessary for initial feeding of Atlantic salmon and rainbow trout 7.5 °C
Salmo salar Larvae Temperature during larval development It is relevant to note that a temperature of at least 7-8°C is reported as being necessary for initial feeding of Atlantic salmon and rainbow trout 7.5 °C
Salvelinus alpinus Larvae Temperature during larval development The experimental temperatures chosen were 3, 6, 8 and 12°C 3.0 °C
Salvelinus alpinus Larvae Full yolk-sac resorption Stage 2 was when about two-thirds of the yolk has been used: 61 days (3°C), 44 (6°C), 35 (8°C) and 32 (12°C) and Stage 3 was yolk exhaustion, defined as the point at which less than 1.5% of the yolk remain: 101 days (3°C), 75 (6°C), 59 (8°C) and 48 (12°C) and in degree-days 320 (3°C), 400 (6°C), 450 (8°C) and 570 (12°C) 2.0 °C * day
Salvelinus alpinus Larvae Onset of exogeneous feeding First feeding coincided with swim-up at 6°C and at 8°C while at 3°C one fish was observed to have taken food before swim-up. At 12°C swim-up was registered 3 days before the first occurence of feeding. About 170 DD [3°C], 240 [6°C], 250 [8°C] and 320 [12°C] or in days ca. 55 (3°C), 40 (6°C), 35 (8°C) and 32 (12°C). At all temperatures the alevins were between 19 and 22 mm in length at 50% feeding. Registration of 50% occured about 40 day-degrees after 50% swim-up, independent of temperature 6.0 °C * day