Chascanopsetta crumenalis — Details

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Overview

Comprehensive Description

Biology

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Benthic on sand (Ref. 58302).
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Distribution

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Eastern Central Pacific: Hawaii.
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Range Description

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Chascanopsetta crumenalis is endemic to the waters of the Hawaiian Islands (Amaoka and Yamamoto 1984).
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Hawaiian Islands; possibly also Madagascar (Indian Ocean).
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Physical Description

Morphology

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Dorsal soft rays (total): 119 - 123; Analsoft rays: 84 - 86; Vertebrae: 56 - 58
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Diagnostic Description

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Length of lower jaw on ocular side 26.4-34.2 % in SL, on blind side 27.2-34.8; depth of caudal peduncle 5.2-6.0 % in SL (Ref. 10737).
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Type Information

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Type for Chascanopsetta crumenalis
Catalog Number: USNM 47738
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Year Collected: 1891
Locality: (Hawaiian Islands)., Oahu, Hawaii, United States, Hawaiian Islands, Pacific
Depth (m): 545 to 545
Vessel: Albatross
  • Type:
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Ecology

Habitat

Environment

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bathydemersal; marine; depth range 443 - 640 m (Ref. 11412)
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Habitat and Ecology

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Habitat and Ecology
Chascanopsetta crumenalis is a mesopelagic, benthic species found on sand, mud and clay substrates. It has been found at a depth range of 443-640m.

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

Environmental ranges
  Depth range (m): 204 - 660
  Temperature range (°C): 6.973 - 18.228
  Nitrate (umol/L): 3.540 - 30.408
  Salinity (PPS): 34.113 - 34.906
  Oxygen (ml/l): 2.252 - 4.513
  Phosphate (umol/l): 0.364 - 2.193
  Silicate (umol/l): 3.651 - 47.960

Graphical representation

Depth range (m): 204 - 660

Temperature range (°C): 6.973 - 18.228

Nitrate (umol/L): 3.540 - 30.408

Salinity (PPS): 34.113 - 34.906

Oxygen (ml/l): 2.252 - 4.513

Phosphate (umol/l): 0.364 - 2.193

Silicate (umol/l): 3.651 - 47.960
 
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Depth: 443 - 640m.
From 443 to 640 meters.

Habitat: bathydemersal.
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Conservation

Conservation Status

IUCN Red List Assessment

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Red List Category
DD
Data Deficient

Red List Criteria

Version
3.1

Year Assessed
2010

Assessor/s
Munroe, T.A.

Reviewer/s
Collen, B., Richman, N., Beresford, A., Chenery, A. & Ram, M.

Contributor/s
De Silva, R., Milligan, H., Lutz, M., Batchelor, A., Jopling, B., Kemp, K., Lewis, S., Lintott, P., Sears, J., Wilson, P., Smith, J. and Livingston, F.

Justification
Chascanopsetta crumenalis has been assessed as Data Deficient due to its restricted distribution and the lack of information available on its abundance. Further research is needed on the population size and possible threats of this species before a more accurate assessment of the conservation status can be made.
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Population

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Population
There is no population information available for Chascanopsetta crumenalis.

Population Trend
Unknown
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Threats

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Data deficient (DD)
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Major Threats
It is unlikely that Chascanopsetta crumenalis is being impacted upon by any major threat processes. This species may be taken as incidental catch by bottom trawling fisheries, however it is of no commercial interest at the present time and this threat process is unlikely to be causing significant declines.
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Management

Conservation Actions

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Conservation Actions
There are no species-specific conservation measures in place for Chascanopsetta crumenalis.

Further research is needed on the threats and population numbers of this species.
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