Overview

Distribution

Range Description

Sepia chirotrema is found off Australia ranging from the Spencer Gulf, South Australia westwards to Shark Bay in Western Australia (Reid et al. 2005).
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This large species has a mantle length of up to 200 mm.

Systems
  • Marine
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Depth range based on 8 specimens in 1 taxon.
Water temperature and chemistry ranges based on 7 samples.

Environmental ranges
  Depth range (m): 124 - 212
  Temperature range (°C): 14.861 - 17.734
  Nitrate (umol/L): 0.862 - 2.626
  Salinity (PPS): 35.414 - 35.733
  Oxygen (ml/l): 5.062 - 5.434
  Phosphate (umol/l): 0.141 - 0.376
  Silicate (umol/l): 1.461 - 2.079

Graphical representation

Depth range (m): 124 - 212

Temperature range (°C): 14.861 - 17.734

Nitrate (umol/L): 0.862 - 2.626

Salinity (PPS): 35.414 - 35.733

Oxygen (ml/l): 5.062 - 5.434

Phosphate (umol/l): 0.141 - 0.376

Silicate (umol/l): 1.461 - 2.079
 
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Dispersal

Depth range

120 to 210 m.
  • Jereb, P.; Roper, C.F.E. (Eds)(2005). An annotated an illustrated catalogue of cephalopod species known to date. Volume 1: Chambered nautilusses and sepioids (Nautilidae, Sepiidae, Sepiolidae, Sepiadariidae, Idiosepiidae and Spirulidae). FAO Species Catalogue for Fishery Purposes 4(1). FAO, Rome. 262p., 9 colour plates.
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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 chirotrema has been assessed as Least Concern as it has a relatively broad distribution, is not the target of fisheries and is therefore unlikely to be threatened.
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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).
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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, life history traits and threats impacting this species.
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Wikipedia

Sepia chirotrema

Sepia chirotrema is a species of cuttlefish native to the southern Indo-Pacific, specifically from Investigator Strait, southern Australia (35°25′S 137°22′E / 35.417°S 137.367°E / -35.417; 137.367) to Dirk Hartog Island, western Australia (25°45′S 113°03′E / 25.750°S 113.050°E / -25.750; 113.050). It lives at a depth of between 120 and 210 m.[1]

S. chirotrema grows to a mantle length of approximately 200 mm.[1]

The type specimen was collected in the Investigator Strait area (35°25′S 137°22′E / 35.417°S 137.367°E / -35.417; 137.367), south of Kangaroo Island (35°50′S 137°15′E / 35.833°S 137.250°E / -35.833; 137.250). It was deposited at the Australian Museum in Sydney but no longer exists.[2]

References

  1. ^ a b Reid, A., P. Jereb, & C.F.E. Roper 2005. Family Sepiidae. In: P. Jereb & C.F.E. Roper, eds. Cephalopods of the world. An annotated and illustrated catalogue of species known to date. Volume 1. Chambered nautiluses and sepioids (Nautilidae, Sepiidae, Sepiolidae, Sepiadariidae, Idiosepiidae and Spirulidae). FAO Species Catalogue for Fishery Purposes. No. 4, Vol. 1. Rome, FAO. pp. 57–152.
  2. ^ Current Classification of Recent Cephalopoda
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