Overview

Distribution

Range Description

Hedley's cuttlefish (Sepia hedleyi) is endemic to Australia and has a geographic distribution that extends from Shark Bay in Western Australia, along southern Australia and Tasmania, to the Great Barrier Reef off southern Queensland (Reid et al. 2005).
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Source: IUCN

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Physical Description

Type Information

Paratype for Sepia hedleyi Berry, 1918
Catalog Number: USNM 815720
Collection: Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology
Sex/Stage: male;
Preparation: Alcohol (Ethanol)
Locality: Kangaroo Island, Investigator Strait, S Of, South Australia, Australia, Indian Ocean
Vessel: Endeavour R/V
  • Paratype: Berry, S. S. 1918. Biol. Results Fish. Exp. Endeavour. 4(5): 258-264.
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© Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology

Source: National Museum of Natural History Collections

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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This species has a very wide depth distribution extending from shallow water to the continental slope (Reid et al. 2005).

Systems
  • Marine
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Depth range based on 44 specimens in 1 taxon.
Water temperature and chemistry ranges based on 18 samples.

Environmental ranges
  Depth range (m): 32 - 549
  Temperature range (°C): 9.210 - 18.155
  Nitrate (umol/L): 0.072 - 16.709
  Salinity (PPS): 34.727 - 35.906
  Oxygen (ml/l): 4.363 - 5.439
  Phosphate (umol/l): 0.126 - 1.174
  Silicate (umol/l): 1.316 - 6.618

Graphical representation

Depth range (m): 32 - 549

Temperature range (°C): 9.210 - 18.155

Nitrate (umol/L): 0.072 - 16.709

Salinity (PPS): 34.727 - 35.906

Oxygen (ml/l): 4.363 - 5.439

Phosphate (umol/l): 0.126 - 1.174

Silicate (umol/l): 1.316 - 6.618
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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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
2012

Assessor/s
Barratt, I. & Allcock, L.

Reviewer/s
Reid, A., Rogers, Alex & Bohm, M.

Contributor/s
Herdson, R. & Duncan, C.

Justification
Sepia hedleyi has been assessed as Least Concern as, although it is sometimes caught as bycatch, it has a wide distribution and low impact localised fishing activity is unlikely to impact the species as a whole.
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Population

Population
The population size of this species is unknown.

Population Trend
Unknown
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Threats

Major Threats
Ocean acidification caused by increased levels of carbon dioxide in the atmosphere is potentially a threat to all cuttlefish. Studies have shown that under high pCO2 concentrations, cuttlefishes actually lay down a denser cuttlebone which is likely to negatively affect buoyancy regulation (Gutowska et al. 2010). This species is taken as bycatch (Reid et al. 2005).
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Management

Conservation Actions

Conservation Actions
No conservation measures are currently needed for this species and none are in place. Further research is recommended regarding the population trends, distribution, life history traits and threats impacting this species.
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