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Scleropages jardinii, Australian bonytongue : aquaculture, gamefish, aquarium
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Scleropages jardinii
Picture by
Muséum-Aquarium de Nancy/B. Alenda
Teleostei (teleosts) >
Osteoglossiformes
(Bony tongues) >
Osteoglossidae
(Arowanas)
Etymology:
Scleropages:
Greek, skleros = hard + Greek, page, -es = knot (Ref.
45335
)
.
More on author:
Saville-Kent
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; pelagic. Tropical; ? - 15°C (Ref.
44894
); 6°S - 14°S
Asia and Oceania: northern Australia and central-southern New Guinea (Ref.
58511
).
Length at first maturity / Size / Weight / Age
Maturity: L
m
45.0
  range ? - ? cm
Max length : 100.0 cm SL male/unsexed; (Ref.
44894
); common length : 55.0 cm SL male/unsexed; (Ref.
44894
)
Short description
Morphology
|
Morphometrics
Dorsal
spines
(total): 0;
Dorsal
soft rays
(total): 20-24;
Anal
spines
: 0;
Anal
soft rays
: 28 - 32
Adults occur in still waters of streams and swamps where it is usually seen near the surface or close to shore among aquatic vegetation (Ref.
2847
,
44894
). Solitary, territorial and spawn prior to the wet season when surface water temperatures approach 30°C (Ref.
44894
). Young feed primarily on microcrustaceans (Ref.
2847
). Primarily a surface feeder, feeding on a variety of terrestrial and aquatic insects, small fishes, frogs, crustaceans, and some plant material (Ref.
44894
). Mouthbrooders (Ref.
56180
). Maximum weight reported in Ref. 5259 may be 12.27 kg (W. Lau, pers. Comm. 07/05). Important food fish (Ref.
58511
) and a valuable aquarium fish (Ref.
83518
).
Fertilized eggs are carried in the mouth of the female. Eggs hatch in 1-2 weeks. Larvae, with their enlarged yolk sac, are kept in or close to the mouth for another 4 or 5 weeks. Young fish commence feeding, primarily on microcrustaceans, at a size of 2-3 cm, well before the yolk sac is entirely resorbed. Become independent at a length of 3.5-4.0 cm.
Allen, G.R.
, 1991. Field guide to the freshwater fishes of New Guinea. Publication, no. 9. 268 p. Christensen Research Institute, Madang, Papua New Guinea. (Ref.
2847
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
14 February 2019
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: of no interest; aquaculture: commercial; gamefish: yes; aquarium: commercial
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Estimates based on models
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5781 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00514 - 0.02450), b=3.04 (2.87 - 3.21), in cm total length, based on all LWR estimates for this body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 2.8 ±0.1 se; based on diet studies.
Resilience (Ref.
120179
): Low, minimum population doubling time 4.5 - 14 years (tm=4-5; Fec=30-130).
Fishing Vulnerability (Ref.
59153
): High to very high vulnerability (73 of 100).
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- 20 July 2016
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