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Overview

Comprehensive Description

Biology

Mesopelagic (Ref. 58302). Found in 50-600 m during the day and 100-375 m at night (Ref. 4054). Feed on copepods (Ref. 6885). Oviparous, with planktonic eggs and larvae (Ref. 35838).
  • Quéro, J.-C., J.C. Njock and M.M. de la Hoz 1990 Sternoptychidae. p. 275-282. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris; and UNESCO, Paris. Vol. 1. (Ref. 4462)   http://www.fishbase.org/references/FBRefSummary.php?id=4462&speccode=40 External link.
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References

Baird RC. 1971. The Systematics, Distribution, and Zoogeography of the Marine Hatchetfishes (family Sternoptychidae). Bulletin of the Museum of Comparative Zooology 142(1):1–128.

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Data on Catalog of Fishes

View data on Catalog of Fishes here.

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Type locality

Salomon Atoll, Chagos Archipelago, Indian Ocean [ca. 5°22'S 72°16'E], depth 400–500 fathoms.

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Type specimen(s)

Holotype: BMNH 1908.3.23.5.

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Main Reference

Baird RC. 1971. The Systematics, Distribution, and Zoogeography of the Marine Hatchetfishes (family Sternoptychidae). Bulletin of the Museum of Comparative Zooology 142(1):1–128.

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Description

Dorsal-fin rays 9; anal-fin rays 12; pectoral-fin rays 10–11; total gill rakers 17-21; vertebrae 35–37. Medium size species seldom exceeding 60 mm SL; body less deep, depth at of dorsal about two or times into SL; dorsal blade low, height about three or more times into its length; postabdominal spines of equal size, anterior one occasionally straight, usually squared or blunted; upper preopercle spine long, directed posteriorly and usually dorsally, lower directed ventrally and often slightly posteriorly; jaws medium; teeth small, recurved, no large canines present; gill rakers medium to long, slightly dentate; first preanal photophore raised well above second which is even with or above third; anal pterygiophore gap with three haemal spines lacking pterygiophores; in preservative pigment often quite dark; large distinct pigment spots present along midline, especially evident in smaller specimens; there may be a diurnal pigment difference similar to A. hemigymnus in this species.

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Distribution

occurs (regularly, as a native taxon) in multiple nations

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National Distribution

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

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tropical Atlantic waters to as far north as Sable Island Bank
  • North-West Atlantic Ocean species (NWARMS)
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Atlantic, Indian and Pacific: in tropical waters. Eastern Atlantic: Cape Blanc, Mauritania to Namibia. Eastern Pacific: Oregon to southern California in the USA (Ref. 265). Southeast Pacific: Chile (Ref. 9068). South China Sea (Ref.74511).
  • Quéro, J.-C., J.C. Njock and M.M. de la Hoz 1990 Sternoptychidae. p. 275-282. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris; and UNESCO, Paris. Vol. 1. (Ref. 4462)   http://www.fishbase.org/references/FBRefSummary.php?id=4462&speccode=40 External link.
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In the Atlantic, this species is found in abundance along the African coast from about 15°S northward into the Gulf of Guinea; it occurs in moderate numbers across the equatorial Atlantic in a belt from 5°S to 15°N latitude; it is abundant in the Caribbean in the vicinity of the Venezuelan coast, absent from the northern Caribbean, appearing again in numbers in the western and northern Gulf of Mexico and the straits of Florida; a few small catches have been taken in the North Atlantic and along the Brazilian coast. In the Pacific a somewhat biantitropical distribution is indicated, with large populations represented in the North Pacific to about 175°W longitude, and off the California coast; another large population occurs off the coast of Chile; the species occurs north of New Zealand and south of Hawaii. A. sladeni is abundant in the northern Indian Ocean to about 15°and along the African coast to about 10° S; while not reported from the Bay of Bengal, it is represented by several small catches south of Java.

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Circumglobal in tropical and temperate seas, including Hawaiian Islands.
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Physical Description

Morphology

Dorsal spines (total): 0; Dorsal soft rays (total): 9; Analspines: 0; Analsoft rays: 11 - 12; Vertebrae: 35 - 38
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Size

Maximum size: 67 mm NG
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Max. size

7.0 cm TL (male/unsexed; (Ref. 27000))
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Rarely exceed 60 mm SL.

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Diagnostic Description

Branchiostegal rays: 10 (Ref. 35838).
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Two separate postabdominal spines; anal subcaudal gap fewer than 2.0 times anal-preanal gap; dorsal rays. Both postabdominal spines of about equal length and size; anterior margin of posteriormost abdominal keel scale almost vertical; greater than 3.5 times body depth. No pair of enlarged canines in lower jaw; anteriormost postabdominal spine squared or blunt (except very small individuals), not curving evenly forward; upper preopercular spine extends well beyond posterior border of preopercle; no pigment on outermost caudal rays. Dorsal blade low, blade height less than 2.5 mm for 25–50 mm, less than 3.1 mm for 50-70 mm; body narrow; no spines on scales below subcaudal photophores; dark well-developed pigment spots forming line along posterior midline (especially in smaller sizes); upper preopercle spine usually curved.

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Type Information

Paratype for Argyropelecus sladeni
Catalog Number: USNM 164002
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): Moore & et al.
Year Collected: 1950
Locality: Hawaii, Kona, Mauna Loa Lava Flow, Hawaii, United States, Hawaiian Islands, Pacific
Vessel: Henry O'Malley
  • Paratype:
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Paratype for Argyropelecus sladeni
Catalog Number: USNM 164003
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): Y. Yamaguchi
Year Collected: 1950
Locality: Hawaii, Kona, Mauna Loa Lava Flow, Hawaii, United States, Hawaiian Islands, Pacific
  • Paratype:
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Paratype for Argyropelecus sladeni
Catalog Number: USNM 164001
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): Hayes & Burke
Year Collected: 1950
Locality: Hawaii, Kona, Mauna Loa Lava Flow, Hawaii, United States, Hawaiian Islands, Pacific
  • Paratype:
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Holotype for Argyropelecus sladeni
Catalog Number: USNM 177931
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Preparation: Illustration
Collector(s): Y. Yamaguchi
Year Collected: 1950
Locality: Hawaii: Mauna Loa Lava Flow, Kona, Hawaii, United States, Hawaiian Islands, Pacific
  • Holotype:
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Ecology

Habitat

Habitat Type: Marine

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Known from seamounts and knolls
  • Stocks, K. 2009. Seamounts Online: an online information system for seamount biology. Version 2009-1. World Wide Web electronic publication.
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nektonic
  • North-West Atlantic Ocean species (NWARMS)
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Found to depths of 2926 m.
  • North-West Atlantic Ocean species (NWARMS)
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Environment

bathypelagic; marine; depth range 0 - 2926 m (Ref. 26165)
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Depth range based on 47 specimens in 1 taxon.
Water temperature and chemistry ranges based on 32 samples.

Environmental ranges
  Depth range (m): 100 - 4600
  Temperature range (°C): 1.433 - 21.982
  Nitrate (umol/L): 0.493 - 38.897
  Salinity (PPS): 34.091 - 35.679
  Oxygen (ml/l): 0.364 - 6.187
  Phosphate (umol/l): 0.261 - 2.814
  Silicate (umol/l): 1.102 - 145.704

Graphical representation

Depth range (m): 100 - 4600

Temperature range (°C): 1.433 - 21.982

Nitrate (umol/L): 0.493 - 38.897

Salinity (PPS): 34.091 - 35.679

Oxygen (ml/l): 0.364 - 6.187

Phosphate (umol/l): 0.261 - 2.814

Silicate (umol/l): 1.102 - 145.704
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Depth: 0 - 2926m.
Recorded at 2926 meters.

Habitat: bathypelagic. Mesopelagic, found in 50-600 m during the day and 100-375 m at night (Ref. 4054). Feeds on copepods (Ref. 6885).
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Migration

Non-Migrant: No. All populations of this species make significant seasonal migrations.

Locally Migrant: No. No populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).

Locally Migrant: No. No populations of this species make annual migrations of over 200 km.

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General Ecology

Ecology

Concentrated between 350 m and 600 m by day, with the major concentrations between 350 m and 450 m; by night concentrated between 100 m and 375 m, with the major concentrations between 100 m and 300 m; no marked indication of geographic variation with depth.

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Life History and Behavior

Behavior

Diet

Feeds on copepods
  • North-West Atlantic Ocean species (NWARMS)
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Life Cycle

Oviparous (Ref. 35838).
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Argyropelecus sladeni

The following is a representative barcode sequence, the centroid of all available sequences for this species.


No available public DNA sequences.

Download FASTA File
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Statistics of barcoding coverage: Argyropelecus sladeni

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Specimens with Barcodes: 3
Species With Barcodes: 1
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Conservation

Conservation Status

National NatureServe Conservation Status

Canada

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

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Threats

Not Evaluated
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: of no interest
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