Barbeled houndshark

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Barbeled houndshark
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Subdivision: Selachimorpha
Order: Carcharhiniformes
Family: Leptochariidae
J. E. Gray, 1851
Genus: Leptocharias
A. Smith, 1838
Species:
L. smithii
Binomial name
Leptocharias smithii
Range of the barbeled houndshark
Synonyms

Mustelus osborni Fowler, 1923
Triaenodon smithii Müller & Henle, 1839

The barbeled houndshark (Leptocharias smithii) is a

sexually dimorphic
teeth. Its maximum known length is 82 cm (32 in).

Likely strong-swimming and opportunistic, the barbeled houndshark has been known to ingest

viviparous with females bearing litters of 7 young; the developing embryos are sustained via a unique globular placental structure. The International Union for Conservation of Nature (IUCN) has assessed the barbeled houndshark as Vulnerable, as heavy fishing pressure occurs throughout its range and it is used for meat and leather
.

Taxonomy and phylogeny

The genus Leptocharias was coined by

type specimen is an adult male collected off Cabinda Province, Angola
. [3]

Because of its many

Ma) deposits in Britain.[5]

Distribution and habitat

The barbeled houndshark occurs along the western coast of

dissolved oxygen levels of 3–4 ppm. It is typically found close to the bottom over mud, particularly around river mouths.[3]

Description

The barbeled houndshark has an extremely slender body and horizontally oval eyes equipped with internal

caudal fin is smooth and lacks a notch (precaudal pit) at its base; the lower caudal fin lobe is virtually absent. This shark is a plain light gray above and whitish below.[3] Males and females grow up to 77 and 82 cm (30 and 32 in) long, respectively.[6]

Biology and ecology

The barbeled houndshark seems to be an active swimmer, based on its strong musculature, long tail, short trunk, and small

parasites of this species include the copepods Eudactylina leptochariae and Thamnocephalus cerebrinoxius.[7][8]

The enlarged anterior teeth of male barbeled houndsharks may function in mating behaviors. This species is

gestation period of at least four months. The largest fetuses on record measured 20 cm (7.9 in) long, which is presumably close to the birth size. Males reach sexual maturity at 55–60 cm (22–24 in) long, and females at 52–58 cm (20–23 in) long.[9]

Human interactions

Harmless to humans,

bottom trawls. When retained, the meat is sold fresh, smoked, or dried and salted, and leather is made from the skin. The IUCN has assessed the barbeled houndshark as Vulnerable, noting that fishing pressure is intense throughout its range. However, no specific fishery data are available.[1]

References

  1. ^ a b Jabado, R.W.; Chartrain, E.; De Bruyne, G.; Derrick, D.; Dia, M.; Diop, M.; Metcalfe, K.; Doherty, P.; Leurs, G.H.L.; Pires, J.D.; Ratão, S.; Seidu, I.; Soares, A.-L.; Tamo, A.; VanderWright, W.J.; Williams, A.B. (2021). "Leptocharias smithii". p. e.T39350A124404329.
  2. ISBN 1-930665-76-8
    .
  3. ^
    ISBN 92-5-101384-5
    .
  4. PMID 16564708. Archived from the original
    (PDF) on 2010-06-13. Retrieved 2010-01-20.
  5. S2CID 55198093
    .
  6. ^ a b Froese, Rainer; Pauly, Daniel (eds.) (2010). "Leptocharias smithii" in FishBase. January 2010 version.
  7. JSTOR 20106263
    .
  8. S2CID 34672117
    .
  9. ISBN 978-0-691-12072-0
    .

External links

Media related to Leptochariidae at Wikimedia Commons

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