|Scientific Name:||Neotrygon ningalooensis|
|Species Authority:||Last, White & Puckridge, 2010|
|Taxonomic Notes:||There is uncertainty about the identification of some specimens referred to as the Ningaloo Maskray (Neotrygon ningalooensis). Those from Shark Bay (Western Australia) and Gove (Northern Territory) need to be further validated as being the same species. There is some evidence that the Shark Bay population could represent an additional species (W.T. White unpubl. data 2010), which may affect the assessment of this species, as the restricted geographic range could become more of an issue with any threats.|
|Red List Category & Criteria:||Data Deficient ver 3.1|
|Assessor(s):||Ferretti, F. & White, W.T.|
|Reviewer(s):||Walls, R.H.L. & Kyne, P.M.|
|Facilitator/Compiler(s):||Kyne, P.M. & Walls, R.H.L.|
The Ningaloo Maskray (Neotrygon ningalooensis) is a recently described species from northern and western Australia known from a limited number of specimens. Its exact range is poorly understood. This maskray appears to inhabit only very shallow waters (<5 m depth) in which there are no commercial fisheries likely to catch it, nor recreational fisheries likely to affect it negatively. The marine protected areas in the Ningaloo Marine Park and a World Heritage Area at Shark Bay are likely to offer substantial protection for this species. The main threat to this maskray in future would likely be from habitat destruction such as marina/canal developments, or reef destruction. Its shallow and narrow bathymetric range might cause some concern for its possible exposure to multiple coastal perturbations due to human activities in other parts of its range, which are currently poorly known. Based on the general lack of information on the species, a possible micro-endemic habitat specialist, the Ningaloo Maskray cannot be assessed beyond Data Deficient at this stage.
|Previously published Red List assessments:||
The Ningaloo Maskray was described from Ningaloo Marine Park, in particular near Five Fingers Reef, south of Coral Bay (23°10’S, 113°45’E), further north at Lakeside (22°39’S, 113°55’E) and near Bundegi Reef, in Exmouth Gulf (21°49’S, 114°10’E). Additionally, this species possibly occurs from Shark Bay, Western Australia (25°46’S, 113°41’E), to near Gove, Northern Territory (Last et al. 2010). However, see comments in the taxonomic notes section regarding taxonomic issues. It appears that this species occurs in only very shallow waters (<5 m) on soft sediments close to reef. However, the actual area of occupancy could be much smaller as the species distribution could be quite patchy and fragmented and the Ningaloo Maskray’s distribution is possibly related to its highly specific habitat preferences (Last et al. 2010).
Native:Australia (Western Australia)
|FAO Marine Fishing Areas:||
Indian Ocean – eastern; Pacific – western central
|Lower depth limit (metres):||5|
|Range Map:||Click here to open the map viewer and explore range.|
The Ningaloo Maskray is a recently described species whose identification is based on only a few records, thus not much information on population size and structure is currently available. The Shark Bay specimens appear to be genetically distinct from those collected at Ningaloo Marine Park, but they show no obvious differences in morphometrics or meristics (Last et al. 2010). This species might be misidentified with other congeners, but it is quite distinctive and the reason for its only recent discovery is probably mostly a result of its very shallow habitat.
|Current Population Trend:||Unknown|
|Habitat and Ecology:||
The Ningaloo Maskray is a shallow water demersal species inhabiting bottoms with soft sediments adjacent to reef areas. Depth range appears to be very narrow (<5 m) based on the records known to date. The species can hide burying itself into bottom sediments. Its protrusible eyes can give the Ningaloo Maskray a selective advantage relative to other similar species, as they allow the species to bury deeper than congeners, and thus to observe its surroundings, be camouflaged, and avoid predators more effectively than other species. Maximum known size is 30.2 cm disc width (Last et al. 2010).
|Use and Trade:||There is no known trade of the Ningaloo Maskray.|
|Major Threat(s):||Since the Ningaloo Maskray occurs in very shallow water, it is unlikely that the majority of fisheries occurring within its region adversely affect it (for example, the species has never been recorded in trawls; Last et al. 2010). However, due to this shallow habitat preference, it is susceptible to habitat modifications, damage, or removal. In its definite known range, Ningaloo Marine Park, there are a large number of protected areas, which will protect this species from such threats. Likewise, the Shark Bay populations are also offered protection from the fact that it is a World Heritage Area in a remote region. Coastal activities such as salt mining, marina developments, and other habitat disturbances would represent substantial local threats to this species were they to occur in its habitat.|
|Conservation Actions:||The Ningaloo Maskray’s extent of occurrence partly overlaps with Ningaloo Marine Park, which stretches for over 300 km along the Western Australian coastline. Hence some part of the population benefits from a protection regime in these areas since 1987 when the park was established. Another part of the population occurs within the remote World Heritage Area of Shark Bay.|
|Citation:||Ferretti, F. & White, W.T. 2015. Neotrygon ningalooensis. The IUCN Red List of Threatened Species 2015: e.T195463A68636829. . Downloaded on 13 February 2016.|
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