Overview

Distribution

Range Description

This species is distributed in the Indo-West Pacific region including the Gulf of Aden, East Africa (KwaZulu-Natal, Kenya, Mozambique Channel, Madagascar), the Bay of Bengal, Japan (Sagami Bay to Tosa Bay), Taiwan, the Philippines, Indonesia and Australia (West Australia and Queensland) (Holthuis 1991, Zarenkov 2006, DEWHA 2009). It is likely that this species is also distributed in: Malaysia, Cambodia, Viet Nam, southeast China, and Korea (A.C. Cockcroft and A. B. MacDiarmid pers. comm. 2008).

The type locality for this species is 25 miles off RossIsland on the eastern coast of the Andaman Islands, India, from a depth of 476-550 m (Holthuis 1991).


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Ecology

Habitat

Deep sea between 170 and over 1060 m, usually between 500 and 750 m. On soft muddy substrates.
  • Holthuis, L.B. 1991. FAO species catalogue. Vol 13. Marine lobsters of the world. An annotated and illustrated catalogue of species of interest to fisheries known to date. FAO fisheries Synopsis. 125 (13):292 p.
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Habitat and Ecology

Habitat and Ecology

This deep sea species can be found at depths of 170-1,060 m, but is most commonly found between 500-750 m. This species inhabits soft muddy substrates, and can reach a maximum body length of 15 cm, although most commonly specimens are around 10 cm in size (Holthuis 1991).


Systems
  • Marine
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Depth range based on 21 specimens in 1 taxon.
Water temperature and chemistry ranges based on 9 samples.

Environmental ranges
  Depth range (m): 200 - 818
  Temperature range (°C): 7.316 - 10.372
  Nitrate (umol/L): 18.488 - 32.717
  Salinity (PPS): 34.448 - 34.802
  Oxygen (ml/l): 1.925 - 3.554
  Phosphate (umol/l): 1.575 - 2.494
  Silicate (umol/l): 27.363 - 73.996

Graphical representation

Depth range (m): 200 - 818

Temperature range (°C): 7.316 - 10.372

Nitrate (umol/L): 18.488 - 32.717

Salinity (PPS): 34.448 - 34.802

Oxygen (ml/l): 1.925 - 3.554

Phosphate (umol/l): 1.575 - 2.494

Silicate (umol/l): 27.363 - 73.996
 
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
2011

Assessor/s
Wahle, R., Butler, M., Cockcroft, A. & MacDiarmid, A.

Reviewer/s
Collen, B., Livingstone, S. & Richman, N.

Contributor/s
Batchelor, A., De Silva, R., Dyer, E., Kasthala, G., Lutz, M.L., McGuinness, S., Milligan, H.T., Soulsby, A.-M. & Whitton, F.

Justification
Nephropsis stewarti has been assessed as Least Concern. While this species is harvested off South Africa, this is a very small part of its extensive range and so is not considered a major threat to the population at the present time. There are no other known threats to this species.
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Population

Population
There is insufficient population information available for this species.

Population Trend
Unknown
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Threats

Major Threats

This species may be threatened locally by harvesting, but this is not considered a major threat to the species over its entire range.

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Management

Conservation Actions

Conservation Actions

There are no species-specific conservation measures in place for this species.

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