Overview

Comprehensive Description

Sciades leptaspis (Bleeker, 1862)

Hexanematichthys leptaspis ZBK Bleeker, 1862: 27, pl. 65. Type locality: SW New Guinea . Holotype : RMNH 3060 .

Distribution: Southern New Guinea and northern Australia.

Countries: Indonesia, Papua New Guinea and Australia.

Habitat: Predominantly brackish waters.

Maximum size: 650 mm of TL.

Material examined: AMS I.27420-001 (1 c&s), Australia , Northern Territory , Jabiru, Long Harry’s Billabong ; AMNH 58993 (4 al, 61-83 mm TL), Papua New Guinea , Madang , Ramu River at Bunapas mission, boat launch area, 45 km upstream of mouth ; UMMZ 214017 (1 al, 163 mm TL), Papua New Guinea , Mira Point, Purari River delta .

  • Alexandre P. Marceniuk, Naércio A. Menezes (2007): Systematics of the family Ariidae (Ostariophysi, Siluriformes), with a redefinition of the genera. Zootaxa 1416, 1-126: 108-108, URL:http://www.zoobank.org/urn:lsid:zoobank.org:pub:FFC65592-D8DB-41BE-AEAC-A41EAB6C6185
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Biology

Occurs in lakes, rivers, muddy coastal seas and estuaries (Ref. 5259). Inhabits fresh water in upper reaches of streams, also found in brackish estuaries and lower reaches of rivers (Ref. 44894). Feeds on fishes, prawns, insects, terrestrial fruits, aquatic plants, bottom detritus (Ref. 5259, 44894) and mollusks (Ref. 2847). Breeds between the late dry and early wet season (September to January) in coastal lagoons and flooded swamps. Males orally incubate the eggs until they hatch and guard the fry for about 4 weeks afterwards. A good angling and eating species (Ref. 44894).
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Distribution

Northern Australia and New Guinea (Papua Province, Indonesia and Papua New Guinea); mostly in large rivers and brackish estuaries.
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Western Pacific: northern Australia and central-southern New Guinea.
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Physical Description

Morphology

Dorsal spines (total): 1; Dorsal soft rays (total): 7; Analspines: 0; Analsoft rays: 16 - 20
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Size

Max. size

60.0 cm SL (male/unsexed; (Ref. 44894))
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Ecology

Habitat

Environment

demersal; freshwater; brackish; marine; depth range ? - 135 m (Ref. 57178)
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Depth range based on 2 specimens in 1 taxon.
Water temperature and chemistry ranges based on 1 sample.

Environmental ranges
  Depth range (m): 1 - 133.5
  Temperature range (°C): 22.098 - 22.098
  Nitrate (umol/L): 9.015 - 9.015
  Salinity (PPS): 34.819 - 34.819
  Oxygen (ml/l): 3.284 - 3.284
  Phosphate (umol/l): 0.760 - 0.760
  Silicate (umol/l): 11.713 - 11.713

Graphical representation

Depth range (m): 1 - 133.5
 
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Trophic Strategy

Occurs in lakes, rivers, muddy coastal seas and estuaries (Ref. 5259). Inhabits fresh water in upper reaches of streams, also found in brackish estuaries and lower reaches of rivers (Ref. 44894). Feeds on fishes, prawns, insects, terrestrial fruits, aquatic plants, bottom detritus (Ref. 5259, 44894) and mollusks (Ref. 2847).
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Conservation

Threats

Not Evaluated
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: commercial; gamefish: yes
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