Overview

Comprehensive Description

Biology

Occurs on the continental shelf, from close inshore to offshore. Oviparous (Ref. 6871).
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Distribution

Range Description

Asymbolus analis is endemic to the western Pacific in temperate to subtropical waters off eastern Australia, ranging from southeastern Queensland to Lakes Entrance, Victoria, including waters of New South Wales (Kyne et al. in prep, Alastair Graham, pers. comm).
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Indo-West Pacific: Australia.
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Australia: New South Wales and Victoria.
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Physical Description

Size

Maximum size: 600 mm TL
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Max. size

90.0 cm TL (male/unsexed; (Ref. 9002))
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Diagnostic Description

Body long, rounded, head flattened with pointed snout, gill slits lateral, no ridge over eyes.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
Asymbolus analis is demersal on the continental shelf and is reported in depths of 40 to 159 m (Last and Stevens 1994, Kyne et al. in prep). It reaches at least 60 cm total length (TL) with the smallest mature male reported at 45.8 cm TL, and the smallest mature female 45.5 cm TL (Kyne et al. in prep). Little is known of the biology of the species. Observed stomach contents include fish, cephalopods and crustaceans (pers. obs). The species is oviparous with one functional ovary. Mature females with large ripe ovarian ova have been observed during the months of March, September and October (Kyne et al. in prep.), suggesting that the species may not have a well-defined reproductive season, similar to the situation with other scyliorhinid sharks. There is no available information on age and growth, natural mortality or behavioural ecology.

Systems
  • Marine
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Environment

reef-associated; marine; depth range 10 - 180 m (Ref. 9002), usually 10 - 60 m (Ref. 9002)
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Depth range based on 10 specimens in 1 taxon.
Water temperature and chemistry ranges based on 5 samples.

Environmental ranges
  Depth range (m): 26.5 - 227.5
  Temperature range (°C): 13.813 - 16.152
  Nitrate (umol/L): 1.364 - 6.497
  Salinity (PPS): 35.184 - 35.516
  Oxygen (ml/l): 4.829 - 5.433
  Phosphate (umol/l): 0.292 - 0.502
  Silicate (umol/l): 1.439 - 2.773

Graphical representation

Depth range (m): 26.5 - 227.5

Temperature range (°C): 13.813 - 16.152

Nitrate (umol/L): 1.364 - 6.497

Salinity (PPS): 35.184 - 35.516

Oxygen (ml/l): 4.829 - 5.433

Phosphate (umol/l): 0.292 - 0.502

Silicate (umol/l): 1.439 - 2.773
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Depth: 40 - 79m.
From 40 to 79 meters.

Habitat: demersal.
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Trophic Strategy

Occurs 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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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Asymbolus analis

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 13
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
DD
Data Deficient

Red List Criteria

Version
3.1

Year Assessed
2003

Assessor/s
Kyne, P.M. & Bennett, M.B. (SSG Australia & Oceania Regional Workshop, March 2003)

Reviewer/s
Fowler, S. & Cavanagh, R.D. (Shark Red List Authority)

Contributor/s

Justification
Asymbolus analis is an uncommon, little-known catshark endemic to southeastern Australian. It is demersal on the continental shelf, and very little is known of its biology. It is not targeted commercially, but captured as bycatch in demersal trawl fisheries, where it may be retained in small quantities. Given its endemism and the fact that it is uncommon, bycatch levels need to be monitored and future research directed at its life history.
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Population

Population
There is no available information on subpopulations, however, a number are likely to exist.

Population Trend
Unknown
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Threats

Major Threats
Asymbolus analis is considered to be less common than other closely related Asymbolus species (Last and Stevens 1994). The species is not targeted commercially, however it is captured as bycatch in demersal trawl fisheries (Last and Stevens 1994). It is reported to be retained in the South East Trawl Fishery (SETF), which operates in southern Australian waters from New South Wales to South Australia, although the quantity is unknown (Rose and SAG 2001). It is an uncommon component of the bycatch of the deepwater component of the eastern king prawn sector of the Queensland East Coast Trawl Fishery (Kyne, unpublished data). It is also likely to occur as bycatch in the New South Wales Ocean Prawn Trawl Fishery.
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Data deficient (DD)
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Management

Conservation Actions

Conservation Actions
There are currently no management measures in place for this species. The level of bycatch in fisheries needs to be assessed, as does the level of retention in the SETF.
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: of no interest
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Wikipedia

Australian spotted catshark

The Australian spotted catshark, Asymbolus analis, is a catshark of the family Scyliorhinidae, found only around Australia between 32 and 38°S, at depths between 10 and 180 m. It can grow up to 90 cm.

References[edit]

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