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Platycephalus fuscus, Dusky flathead : fisheries, gamefish
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Dusky flathead
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Platycephalus fuscus
Picture by
Banks, I.
Teleostei (teleosts) >
Perciformes/Scorpaenoidei
(Scorpionfishes) >
Platycephalidae
(Flatheads)
Etymology:
Platycephalus:
Greek, platys = flat + Greek, kephale = head (Ref.
45335
)
.
More on author:
Cuvier
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; brackish; demersal; depth range 0 - 30 m (Ref.
6390
). Subtropical; 17°S - 38°S
Western Pacific: endemic to Australia. Present along the east coast between approximately Cairns, Queensland (Ref.27242) and Gippsland lakes in eastern Victoria.
Length at first maturity / Size / Weight / Age
Maturity: L
m
50.2
  range ? - ? cm
Max length : 120 cm TL male/unsexed; (Ref.
27112
); max. published weight: 15.0 kg (Ref.
27248
)
Short description
Morphology
|
Morphometrics
Dorsal
spines
(total): 8 - 9;
Dorsal
soft rays
(total): 13-14;
Anal
spines
: 0;
Anal
soft rays
: 13 - 14;
Vertebrae
: 27
Generally inhabit shallow bays and inlets and can be found in estuaries as far as tidal limits (Ref.
27246
); they often invade freshwater. They occur over mud, silt gravel, sand and seagrass (mainly
Zostera
species) beds from intertidal areas to depths of 10 m in Queensland and to 30 m in southern New South Wales. Eggs and larvae are dispersed along the coast by tidal and current movements (Ref.
27112
). Small juveniles less than 12 cm TL first appear in coastal bays 1-2 months after spawning. They mainly inhabit shallow mangrove and mud flats and seagrass beds (Ref.
27246
,
27245
). They are usually solitary but may form loose aggregations (Ref.
2165
,
27247
). Feed on small fish, crabs, prawns, small crustaceans. octopus, squid and polychaete worms. They have spines on the outer edges of their head which can inflict nasty cuts during handling (pers. comm., Bernard Moss, 2001).
There is conflicting information (Ref.
27246
,
27245
,
27247
) on whether dusky flahead are protandrous sex reversers or not.
Paxton, J.R., D.F. Hoese, G.R. Allen and J.E. Hanley
, 1989. Pisces. Petromyzontidae to Carangidae. Zoological Catalogue of Australia, Vol. 7. Australian Government Publishing Service, Canberra, 665 p. (Ref.
7300
)
IUCN Red List Status (Ref.
130435
)
Not Evaluated
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: commercial; gamefish: yes
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Estimates based on models
Preferred temperature (Ref.
123201
): 19.1 - 27.1, mean 25.2 °C (based on 291 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00794 (0.00400 - 0.01577), b=3.08 (2.90 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 4.1 ±0.52 se; based on food items.
Resilience (Ref.
120179
): Medium, minimum population doubling time 1.4 - 4.4 years (K=0.22; tm=2).
Fishing Vulnerability (Ref.
59153
): High to very high vulnerability (72 of 100).
Price category (Ref.
80766
):
High
.
Nutrients (Ref.
124155
): Calcium = 132 [8, 523] mg/100g; Iron = 2.27 [0.58, 6.12] mg/100g; Protein = 19.2 [16.9, 21.6] %; Omega3 = 0.481 [0.216, 1.350] g/100g; Selenium = 54.4 [13.6, 213.1] μg/100g; VitaminA = 4.35 [1.42, 12.68] μg/100g; Zinc = 0.72 [0.34, 1.57] mg/100g (wet weight);
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