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Overview

Comprehensive Description

Biology

A little-known inshore shark (Ref. 13567). Viviparous (Ref. 50449). Taken in fisheries where it occurs (Ref. 13567).
  • Compagno, L.J.V. 1984 FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)
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Distribution

Range Description

Northwest and western central Pacific: Thailand, Viet Nam, southern China (off Hong Kong), Taiwan, Japan (Compagno in prep, White et al. 2006). Recent investigation suggests that records of this species from Malaysian Borneo and Indonesia refer to a similar, but distinct species.
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Western Pacific.
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Western Pacific: Japan to Viet Nam, including Hong Kong and Taiwan. Report of a record from off Madagascar may be an undescribed Paragaleus which has just recently been collected.
  • Compagno, L.J.V. 1984 FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)
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Physical Description

Morphology

Dorsal spines (total): 0; Dorsal soft rays (total): 0; Analspines: 0; Analsoft rays: 0
  • Compagno, L.J.V. 1998 Hemigaleidae. Weasel sharks. p. 1305-1311. In K.E. Carpenter and V.H. Niem (eds.) FAO identification guide for fishery purposes. The Living Marine Resources of the Western Central Pacific. FAO, Rome. (Ref. 13567)
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Size

Maximum size: 880 mm TL
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Max. size

88.0 cm TL (male/unsexed; (Ref. 244))
  • Compagno, L.J.V. 1984 FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)
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Diagnostic Description

Grey or grey-brown above, light below; no prominent markings on body and fins (Ref. 13567).
  • Compagno, L.J.V. 1998 Hemigaleidae. Weasel sharks. p. 1305-1311. In K.E. Carpenter and V.H. Niem (eds.) FAO identification guide for fishery purposes. The Living Marine Resources of the Western Central Pacific. FAO, Rome. (Ref. 13567)
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This is an inshore species but its depth range has not been reported (Compagno et al. 2005). Virtually nothing is known about the biology of this species.

Systems
  • Marine
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Environment

demersal; marine
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Life History and Behavior

Life Cycle

Viviparous, placental (Ref. 50449). Distinct pairing with embrace (Ref. 205).
  • Breder, C.M. and D.E. Rosen 1966 Modes of reproduction in fishes. T.F.H. Publications, Neptune City, New Jersey. 941 p. (Ref. 205)
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Paragaleus tengi

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
DD
Data Deficient

Red List Criteria

Version
3.1

Year Assessed
2009

Assessor/s
Ebert, D.A., Fahmi & White, W.T.

Reviewer/s
Valenti, S.V. & Fowler, S.L. (Shark Red List Authority)

Contributor/s

Justification
The Straight-tooth Weasel Shark (Paragaleus tengi) is an inshore, small shark found from Japan to southern China in the western Pacific. It reaches about 92 cm in length, is viviparous and gives birth to litters of two pups, but little else is known of its biology. This species is taken in small numbers as bycatch in various fisheries throughout its range, but no data are available to determine population trends. Insufficient information is currently available to assess this species beyond Data Deficient. Population studies and catch monitoring needs to be undertaken.
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Population

Population
Nothing is currently known about the population status of this species.

Population Trend
Unknown
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Threats

Major Threats
Taken as bycatch in fisheries throughout much of its range, including Hong Kong, Taiwan, Province of China, Japan (D.A. Ebert pers. obs, Compagno in prep.). It is retained and utilised for its meat and fins, but no catch or landings data are available.
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Data deficient (DD)
  • IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
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Management

Conservation Actions

Conservation Actions
There are no known conservation measures within the range of this species. Catch data are required to assess the impact of fisheries on this species throughout its range.
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: minor commercial; price category: unknown; price reliability:
  • Coppola, S.R., W. Fischer, L. Garibaldi, N. Scialabba and K.E. Carpenter 1994 SPECIESDAB: Global species database for fishery purposes. User's manual. FAO Computerized Information Series (Fisheries). No. 9. Rome, FAO. 103 p.
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Wikipedia

Straight-tooth weasel shark

The straight-tooth weasel shark, Paragaleus tengi, is a weasel shark of the family Hemigaleidae, found in the tropical western Pacific Ocean. It can reach a length of 88 cm.

The reproduction of this shark is viviparous.

References[edit]

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