Overview

Comprehensive Description

Biology

Found on the continental shelf at depths of inshore down to about 180 meters. Apparently occurs in a variety of habitats, including sandy bottom, on rocky reefs, in beds of kelp, and in seagrass beds, details of it ecology is, however, virtually unknown (Ref. 43278). Oviparous (Ref. 6871).
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Distribution

Range Description

This population is restricted to the southern coast of Australia.
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SouThern Australia: Victoria to Western Australia.
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Eastern Indian Ocean: endemic to Australia.
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Physical Description

Size

Maximum size: 910 mm TL
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Max. size

91.0 cm TL (male/unsexed; (Ref. 247))
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This species resides in temperate waters along the continental shelf in depths to 180 m. P. variolatum reaches a maximum size of 90 cm and is oviparous. It has been collected in a variety of benthic habitats including sandy, rocky and grassy regions. P. variolatum is nocturnal and is commonly found under rocks during daylight hours. Little else is known about the biology of this species.

Systems
  • Marine
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Depth: 0 - 180m.
Recorded at 180 meters.

Habitat: demersal.
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Environment

demersal; marine; depth range ? - 180 m (Ref. 6871)
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Depth range based on 2 specimens in 1 taxon.
Water temperature and chemistry ranges based on 2 samples.

Environmental ranges
  Depth range (m): 52.5 - 73
  Temperature range (°C): 17.021 - 17.558
  Nitrate (umol/L): 0.222 - 0.367
  Salinity (PPS): 35.745 - 35.860
  Oxygen (ml/l): 5.357 - 5.390
  Phosphate (umol/l): 0.120 - 0.140
  Silicate (umol/l): 1.273 - 1.455

Graphical representation

Depth range (m): 52.5 - 73

Temperature range (°C): 17.021 - 17.558

Nitrate (umol/L): 0.222 - 0.367

Salinity (PPS): 35.745 - 35.860

Oxygen (ml/l): 5.357 - 5.390

Phosphate (umol/l): 0.120 - 0.140

Silicate (umol/l): 1.273 - 1.455
 
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Trophic Strategy

Found on the continental shelf (Ref. 75154).
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Life History and Behavior

Life Cycle

Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449).
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2003

Assessor/s
Heupel, M.R. (SSG Australia & Oceania Regional Workshop, March 2003)

Reviewer/s
Shark Specialist Group Australia & Oceania Regional Group (Shark Red List Authority)

Contributor/s

Justification
Parascyllium variolatum is a southern Australia endemic with a reasonably wide geographic and bathymetric distribution. Although little is known of this species, it is not targeted by fisheries. Due to its size and depth range, it is unlikely to be largely impacted as a bycatch species in the trawl and gillnet fisheries this area.
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Population

Population
Little is known about the population size in this range and no scientific data are currently available.

Population Trend
Unknown
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Threats

Major Threats
Due to the size and depth range of this species it is not commonly collected as bycatch in the trawl and gillnet fisheries.
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Least Concern (LC)
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Management

Conservation Actions

Conservation Actions
There are currently no conservation measures in place for this species.
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: of no interest
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Wikipedia

Necklace carpetshark

The necklace carpetshark, Parascyllium variolatum, is a carpetshark of the family Parascylliidae found around Australia between latitudes 37°S and 41°S, at depths down to 180 m. Its length is up to 91 cm.

Reproduction is oviparous.

References [edit]

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