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Overview

Comprehensive Description

Biology

Found on the upper continental slopes. Oviparous (Ref. 50449).
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Distribution

Range Description

Eastern Pacific. Possibly also occurs in the Northeast Pacific. Nominally from the Eastern Central Pacific off Morocco, but this is probably another species (Compagno in prep. b).
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Eastern Pacific: Gulf of Panama, Ecuador and central Chile. Also nominally recorded from the northeast Atlantic off Morocco, but identification uncertain.
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Eastern Pacific.
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Physical Description

Size

Maximum size: 700 mm TL
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Max. size

70.0 cm TL (male/unsexed; (Ref. 9996))
  • Springer, S. 1990 Scyliorhinidae. p. 90-94. 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.   http://www.fishbase.org/references/FBRefSummary.php?id=9996 External link.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
A little-known shark of the upper continental slope reported at depths of 400 to 925 m (Compagno in prep. b) and 250 to 500 m off Northern and Central Chile (González 2001, Acuña and Villarroel 2002). Females never observed. Mature males reported at 51 to 59 cm total length (TL) (Compagno in prep. b).

Apristurus species are relatively small, sluggish sharks that live on or near the bottom. Diet includes crustaceans (penaeid shrimps, euphausiids), squids and small fishes. Where known reproduction is oviparous with one egg per oviduct. Eggcases are usually thick-walled and about 5 to 6.8 cm long and 2.5 to 2.9 cm wide. The anterior end of the case has a long weak fibrous thread on each corner. The posterior end usually has two small processes, each with a long coiled tendril. As in shallow water scyliorhinids the coiled tendrils are probably used to attach the egg cases to hard substrates and/or biogenic structures as they are laid.

Systems
  • Marine
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Environment

bathydemersal; marine; depth range 400 - 925 m (Ref. 244)
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Depth range based on 5 specimens in 1 taxon.
Water temperature and chemistry ranges based on 1 sample.

Environmental ranges
  Depth range (m): 400 - 797.5
  Temperature range (°C): 5.419 - 5.419
  Nitrate (umol/L): 33.076 - 33.076
  Salinity (PPS): 34.452 - 34.452
  Oxygen (ml/l): 3.175 - 3.175
  Phosphate (umol/l): 2.277 - 2.277
  Silicate (umol/l): 24.387 - 24.387

Graphical representation

Depth range (m): 400 - 797.5
 
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Depth: 400 - 925m.
From 400 to 925 meters.

Habitat: bathydemersal. Found on the upper continental slopes.
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Trophic Strategy

Found on the upper continental slopes. Feeds on pelagic crustaceans (Ref. 58748).
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Life History and Behavior

Life Cycle

Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449).
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
DD
Data Deficient

Red List Criteria

Version
3.1

Year Assessed
2004

Assessor/s
Huveneers, C., Duffy, C. & Acuña, E.

Reviewer/s
Kyne, P.M., Cavanagh, R.D. & Fowler, S.L. (Shark Red List Authority)

Contributor/s

Justification
A poorly known deepwater catshark of the continental slope off South America in the Eastern Pacific (nominal records from the Atlantic are probably a misidentification). Reaches a maximum size of 59 cm total length (TL) but nothing is known of its biology. Taken incidentally in small numbers in the Chilean deep-sea shrimp Heterocarpus reedi fishery (Acuña and Villaroel 2002). Information on interactions with fisheries not available from other countries in its range. Insufficient information is available to assess the species beyond Data Deficient at this time.
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Population

Population Trend
Unknown
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Threats

Major Threats
Potentially threatened by expansion of deepwater trawl fisheries. Off Northern and Central Chile (from 27º46?37?? to 33º19?59??S) the species is taken as bycatch in the deep sea shrimp Heterocarpus reedi fishery (González 2001, Acuña and Villarroel 2002).

Not known to be utilized at present.
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Data deficient (DD)
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Management

Conservation Actions

Conservation Actions
No conservation actions are in place for this species.
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: of no interest
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Wikipedia

Largenose catshark

The largenose catshark, Apristurus nasutus, is a catshark of the family Scyliorhinidae. The largenose catshark is found on the upper continental slopes in the eastern Pacific, from the Gulf of Panama to Ecuador and central Chile, between 9°N and 28°S. It can grow up to 70 cm. Its reproduction is oviparous.

References[edit]

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