Biology
Species | Arripis trutta |
Common Name | Eastern Australian Salmon |
Importance | Key |
Habitat | Open water |
Depth | ≤ 30m (Edgar, 2008) |
Distribution | Victoria to Brisbane, around Tasmania (Edgar, 2008) |
Diet | Fish (pelagic predominantly) (Stewart et al. 2011) |
Stock Structure | Single, well-mixed stock along south-eastern Australia |
Movement | Travel great distances between states; increased population mixing with increasing age and decreasing latitude (Stewart et al. 2011) |
M (Natural Mortality) | 0.35 – 0.50 (Stewart et al. 2011) |
Maximum Age (years) | 12 (potentially ≤26) (Stewart et al. 2011) |
Maximum Length (cm) | 89 (Edgar, 2008) |
Maximum Weight (g) | 9400 (Frimodt, 1995) |
Female K (von Bertalanffy growth parameter) | 0.24 |
Male K (von Bertalanffy growth parameter) | 0.27 |
Female t0 (age (years) when length = 0) | -0.15 |
Male t0 (age (years) when length = 0) | -0.13 |
Female L∞ (asymptotic von Bertalanffy length (fork length; cm)) | 65 |
Male Loo (asymptotic von Bertalanffy length (cm)) | 61.3 |
Size at Maturity (length (fork length; cm) at which 50% of population are sexually mature) | 42.13 (Stewart et al. 2011) |
Age at Maturity (age (years) at which 50% of population are sexually mature) | 2.19 (Stewart et al. 2011) |
Spawning Season | October – March |
Spawning Location | New South Wales (Stewart et al. 2011) |
Batch Fecundity (F; number of eggs) to Fork Length (FL; cm) | F=14581e^(0.0659 L) (F = batch fecundity; L = fork length (cm)) |
Batch Fecundity (F; number of eggs) to Age (A; years) | F=96604e^(0.227 A) (Stewart et al. 2011) |
Early Life History | Eggs, larvae and juveniles drift and migrate from spawning grounds to Tasmania and Victorian waters during autumn and winter. Juveniles (4–6 cm fork length) appear in shallow Tasmanian waters between January and September (Kailola et al. 1993) |
Gillnet Post Release Survival | Low: 20-62% depending on gillnet soak time (Lyle et al. 2014) |