Overview

Distribution

Range Description

This species is found from California to British Columbia (Lambert 1986, Blaine 2011).
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Physical Description

Type Information

Holotype for Parastichopus leukothele Lambert, 1986
Catalog Number: USNM E33775
Collection: Smithsonian Institution, National Museum of Natural History, Department of Invertebrate Zoology
Preparation: Alcohol (Ethanol)
Collector(s): P. Lambert
Year Collected: 1976
Locality: Queen Charlotte Islands, Horn Island, Tasu Sound, British Columbia, Canada, North Pacific Ocean
Microhabitat: Solid rock substrate dominated by cup coral paracyathus
Depth (m): 24 to 24
  • Holotype: Lambert. 1986. Can. J. Zool. 64: 2268-2272, figs.3-6.
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Source: National Museum of Natural History Collections

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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This species favors hard and mixed substrates on the continental shelf, but is found on soft substrate in lower densities as well (Lambert 1986, Blaine 2011).

Systems
  • Marine
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Depth range based on 214 specimens in 1 taxon.
Water temperature and chemistry ranges based on 195 samples.

Environmental ranges
  Depth range (m): 0 - 402.72
  Temperature range (°C): 6.429 - 10.151
  Nitrate (umol/L): 6.725 - 38.262
  Salinity (PPS): 31.893 - 34.164
  Oxygen (ml/l): 0.790 - 6.561
  Phosphate (umol/l): 0.943 - 2.962
  Silicate (umol/l): 14.413 - 67.806

Graphical representation

Depth range (m): 0 - 402.72

Temperature range (°C): 6.429 - 10.151

Nitrate (umol/L): 6.725 - 38.262

Salinity (PPS): 31.893 - 34.164

Oxygen (ml/l): 0.790 - 6.561

Phosphate (umol/l): 0.943 - 2.962

Silicate (umol/l): 14.413 - 67.806
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Parastichopus leukothele

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 4
Species With Barcodes: 1
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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
2013

Assessor/s
Samyn, Y.

Reviewer/s
Knapp, L. & Polidoro, B.

Contributor/s

Justification
This species is found throughout the continental shelf from southern California to southern Canada. It is likely caught as bycatch in benthic trawls of southern California. However, it is suspected that due to miss-identification of this species, captured specimen are not reported. This species inhabits areas that are protected from trawling activity in the United States. More research is needed on the population status of this species as well as current threats occurring to it. This species is listed as Least Concern.
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Population

Population
During 174 submersible dives from September-November 2007 using video transect data at a depth of 25-365 m in Central California (Monterey Bay to Big Sur), a total of 478 individuals of this species were observed with a density of 34 cucumbers*ha-1. The population of this species was densest from 200-250m with an average depth of 211m during this study. The size range recorded was 5-35cm for individuals of this species with an average size of 20cm (Blaine 2011). During a study conducted off British Columbia conducted at a depth of 24-285 m, this species ranged in size from 7-38 cm with an average 16.2 cm (Lambert 1986). This species was found in rare abundance on the Cobb Seamount off the coast of Oregon, California, during submersible dives conducted from 1982-1992 (Parker and Tunnicliffe 1994).

Population Trend
Unknown
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Threats

Major Threats
This species is likely harvested as bycatch throughout southern and central California. However, due to miss-identification with the species Parastichopus californicus, captured individuals of this species are likely not reported (Blaine 2011).
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Management

Conservation Actions

Conservation Actions
There are no known conservation measures currently in place for this species. However, parts of its shallow distribution are likely protected by regional trawling bans.
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