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Dipturus falloargus

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA CHONDRICHTHYES RAJIFORMES RAJIDAE

Scientific Name: Dipturus falloargus
Species Authority: Last, 2008
Common Name(s):
English False Argus Skate, Eye Skate
Taxonomic Notes: The False Argus Skate (Dipturus falloargus) is a short-nosed Dipturus species which differs from the Ocellate Skate (Dipturus oculus) in morphometrics and the lack of a well-developed ocellus on each pectoral fin, and differs from all other Dipturus spp. in body shape and colouration (Last 2008).

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2011
Date Assessed: 2010-12-08
Assessor(s): Kemper, J. & Ebert, D.A.
Reviewer(s): Fowler, S.L., Mull, C. & Simpfendorfer, C.
Justification:
The False Argus Skate (Dipturus falloargus) is a relatively uncommon species known from northwestern Australia. There are no data on population size or trends throughout its range and this species is not currently known to be caught in fisheries. Due to the lack of population, biological and life history information, the False Argus Skate is assessed as Data Deficient. Further information needs to be collected including biological data, life history information, and population size to better assess this species’ conservation status.

Geographic Range [top]

Range Description: The False Argus Skate is distributed along the continental shelf off northwestern Australia between Exmouth Gulf, Western Australia and Melville Island, Northern Territory (Last and Stevens 2009).
Countries:
Native:
Australia (Northern Territory, Western Australia)
FAO Marine Fishing Areas:
Native:
Indian Ocean – eastern; Pacific – western central
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population:

No information is available on population size or trends for the False Argus Skate but it appears to be a relatively uncommon species.

Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: The habitat of the False Argus Skate is generally unknown, but it occupies the outer continental shelf and near the shelf break at depths of 122–256 m (Last 2008). Maximum reported total length (TL) is 49 cm (female); adult males have been observed at 41.4 to 45 cm TL and adolescent males at 32.5 to 37.5 cm TL (Last 2008). Smallest juvenile measured at 21.9 cm TL (Last 2008).
Systems: Marine

Use and Trade [top]

Use and Trade: The False Argus Skate is not utilised in its range.

Threats [top]

Major Threat(s):

The False Argus Skate is not commercially targeted or known to be caught as bycatch in fisheries. Several fisheries exist in the area of Western Australia for prawns and fish species using trawls, gillnets, and traps, which may overlap with the distribution of this species. However, these fisheries are rather restricted to small areas and may not overlap with the depth distribution of this species. Currently, there is the Rowley Shoals Marine Park and Mermaid Reef Marine National Nature Reserve present within this species distribution. Given the current conditions, it is likely that this species is not experiencing any major threats.

Conservation Actions [top]

Conservation Actions: There are currently no conservation actions in place for the False Argus Skate. Additional information on biology, ecology, and population structure is needed to better assess and determine whether conservation measures need to be implemented.

Citation: Kemper, J. & Ebert, D.A. 2011. Dipturus falloargus. The IUCN Red List of Threatened Species. Version 2014.1. <www.iucnredlist.org>. Downloaded on 23 July 2014.
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