Biology
Species | Platycephalus richardsoni |
Common Name | Tiger Flathead |
Importance | Key |
Habitat | Exposed sand and silt |
Depth | 10 – 400 m (Edgar, 2008; Tilzey et al., 1990) |
Distribution | Victoria to New South Wales, around Tasmania (Edgar, 2008; Gomon et al., 2008) |
Diet | Fish (Coleman and Mobley, 1984) |
Stock Structure | No information available |
Movement | Young inhabit shallow waters of the continental shelf and move into the outer shelf as they reach maturity (Kailola et al., 1993; Jordan et al., 1998) |
M (Natural Mortality) | 0.21 – 0.46 (Klaer, 2010) |
Maximum Age (years) | 12 (Rowling, 1994; Bani, 2005) |
Maximum Length (total length; cm) | 65 (Edgar, 2008; Gomon et al., 2008) |
Maximum Weight (g) | 2900 (Edgar, 2008; Gomon et al., 2008) |
Female K (von Bertalanffy growth parameter) | 0.13 |
Male K (von Bertalanffy growth parameter) | 0.26 |
Female t0 (age (years) when length = 0) | -1 |
Male t0 (age (years) when length = 0) | -1 |
Female L∞ (asymptotic von Bertalanffy length (total length; cm)) | 75.02 |
Male L∞ (asymptotic von Bertalanffy length (total length; cm)) | 41.89 |
Length (TL; total length (mm)) – Weight (W; g) Relationship | W=3.25 x 10^(-6)TL^3.13 (Barnes et al., 2011) |
Size at Maturity (total length (cm) at sexual maturity) | 30 (females), 36 (males) |
Age at Maturity (age (years) at sexual maturity) | 4-5 (Fairbridge, 1951) |
Spawning Season | December – February (Jordan, 2001b; Kailola et al., 1993) |
Recruitment | No-stock recruitment relationship established |
Early Life History | Unknown (Jordan, 2001b) |
Gillnet Post Release Survival | Moderate: 50% (all soak durations including both graball and mullet nets) (Lyle et al., 2014) |
Rod and Line Post Release Survival | High: >99% for circle hooks and 94-97% for conventional hooks (Lyle et al., 2007) |