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Pristiophorus japonicus Gunther, 1870
JAPANESE SAWSHARK
Life   Vertebrata   Fish   Pristiophoridae   Pristiophorus

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Following modified from Taiwan Biodiversity National Information Network
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Kingdom Animalia  
 Phylum Chordata  
 Class Chondrichthyes  
 Order Pristiophoriformes  
 Family Pristiophoridae  
 Genus Pristiophorus  
  Pristiophorus japonicus    Günther, 1870 
Provider: Kwang-Tsao Shao 
hierarchy tree    download xml    download txt    Chinese Page    
Citation: Fishbase(2005); 中國軟骨魚誌(朱元鼎,1960)
Character: Trunk somewhat depressed but not greatly flattened and raylike. Rostrum extremely long, narrow, and narrowly tapering. Length of preoral snout 26-29% of total length. Bases of rostral barbels about 1.1-1.2 times closer to mouth than rostral tip. Distance from rostral barbels to nostrils about equal to distance from nostrils to 1st to 4th gill slits. Number of rostral teeth on each side of rostrum in front of barbells are about 15-26, and 9-17 behind them. Distance from mouth to nostrils 1.1-1.2 times the length of internarial space. Rows of upper jaw teeth 34-58. Dorsal and pectoral fin cover with dermal denticles in large individuals. First dorsal origin behind free rear tips of pectorals. 
Habitat: A common sawshark founded in the western North Pacific continental shelves and upper slopes. Ovoviviparous, litter size is about 12. Size of maximum is about 136 cm TL for females. 
Distribution: Western North Pacific including Japan, the Koreas, northern China, Taiwan and the Philippines. 
Utility: Caught with bottom trawls or bottom gill net. Utilized as fresh for human consumption. In Japan, its flesh is considered of high quality and used to prepare “kameboko” for human consumption. 
Name Code: 383139
  IUCN Red List:DD       Marine     
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Following modified from FishBase
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http://www.fishbase.org/Summary/speciesSummary.php?genusname=Pristiophorus&speciesname=japonicus ---> http://www.fishbase.org/summary/Pristiophorus-japonicus.html
http://www.fishbase.org/summary/Pristiophorus-japonicus.html ---> https://www.fishbase.se/summary/Pristiophorus-japonicus.html

Common name (e.g. trout)

Genus + Species (e.g. Gadus morhua)

Pristiophorus japonicus Günther , 1870

Japanese sawshark Add your observation in Fish Watcher
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Pristiophorus japonicus   AquaMaps   Data sources: GBIF OBIS
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Pictures | Stamps, Coins Misc. | Google image Image of Pristiophorus japonicus (Japanese sawshark) Pristiophorus japonicus
Picture by FAO

Classification / Names Common names | Synonyms | Catalog of Fishes ( gen. , sp. ) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (sharks and rays) > Pristiophoriformes (Saw sharks) > Pristiophoridae (Saw sharks)
Etymology: Pristiophorus: Greek, pristis = saw + Greek, pherein = to carry (Ref. 45335 ) .  More on author: Günther .

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; demersal; depth range 0 - 500 m (Ref. 54710 ).   Deep-water; 48°N - 22°N, 118°E - 145°E (Ref. 54710 )

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Northwest Pacific: Japan, Korea, northern China. Does not occur in the Western Central Pacific (Ref. 31368 ).

Size / Weight / Age

Maturity: L m   ?   range ? - ? cm
Max length : 136.0 cm TL (female)

Short description Morphology | Morphometrics

Pristiophorus japonicus has a long, narrow, and narrowly tapering rostrum (rostrum length is 26-29% of TL), distance from rostral tip to barbels about equal or slightly greater than distance from barbels to mouth (1:1.1-1.2); distance from rostral barbels to nostrils about equal to distance from nostrils to 1st gill slits. About 15-26 large rostral teeth on each side of the rostrum in front of the barbels, 9-17+ behind them; distance from mouth to nostrils 1.1-1.2 times internarial space. Tooth rows 34-58 in upper jaw. Dorsal and pectoral fins covered with denticles in large specimens. Lateral trunk denticles largely unicuspidate. First dorsal fin origin behind free rear tips of pectorals by eye length or more (Ref. 247 ). Caudal fin almost straight, with slender upper and lower lobes; pectoral well developed but are not ray-like (Ref. 6871 ).

Biology     Glossary (e.g. epibenthic)

Lives on continental shelves and upper slopes on or near the bottom. Also found in coastal waters on sand or mud bottoms. Feeds on small bottom organisms using its barbels to poke the bottom with its snout. Ovoviviparous, with 12 young in a litter.

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Ovoviviparous, embryos feed solely on yolk (Ref. 50449 ).

Main reference Upload your references | References | Coordinator : Compagno, Leonard J.V. | Collaborators

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 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref. 247 )

IUCN Red List Status (Ref. 120744 )

  Data deficient (DD)  ; Date assessed: 01 December 2008

CITES (Ref. 118484 )

Not Evaluated

CMS (Ref. 116361 )

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: commercial FAO(fisheries: species profile ; publication : search ) | FishSource |

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Estimates based on models

Preferred temperature (Ref. 115969 ): 7.7 - 21.8, mean 17.4 (based on 199 cells). Phylogenetic diversity index (Ref. 82805 ):  PD 50 = 0.5156   [Uniqueness, from 0.5 = low to 2.0 = high]. Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm Total Length, based on all LWR estimates for this body shape (Ref. 93245 ). Trophic Level (Ref. 69278 ):  3.8   ±0.58 se; Based on food items. Resilience (Ref. 120179 ):  Low, minimum population doubling time 4.5 - 14 years (Fec=12). Vulnerability (Ref. 59153 ):  Very high vulnerability (75 of 100) . Price category (Ref. 80766 ):   High .

Entered by Carpenter, Kent E. Modified by Kesner-Reyes, Kathleen Fish Forum
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