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Pristiophorus japonicus Günther, 1870

Japanese sawshark
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Native range | All suitable habitat | Point map | Year 2050
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Pristiophorus japonicus   AquaMaps   Data sources: GBIF OBIS
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Image of Pristiophorus japonicus (Japanese sawshark)
Pristiophorus japonicus
Picture by FAO


Chinese Taipei (Taiwan) country information

Common names: [No common name]
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Although reported in various references (Ref. 247, 559) Shen (1993, Ref. 5193) states that it does not occur in Taiwan.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/tw.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Compagno, L.J.V., 1984
National Database: The Fish Database of Taiwan

Common names from other countries

Classification / Names প্রচলিত নাম সমূহ | প্রতিনাম সমূহ | Catalog of Fishes(গণ , প্রজাতি ) | ITIS | CoL | WoRMS | Cloffa

ইলাসমোব্রাঙ্কি (হাঙ্গর এবং রে) (sharks and rays) > Pristiophoriformes (Saw sharks) > Pristiophoridae (Saw sharks)
Etymology: Pristiophorus: pristio-, presumably derived from prio (Gr.), to saw, but treated here as a noun (a saw); phorus, from phoreus (Gr.), bearer or carrier, referring to saw-like snout (note also that pristis is Greek for sawfish). (See ETYFish);  japonicus: -icus (L.), belonging to: Japan, where type locality (not specified) is situated. (See ETYFish).
  More on author: Günther.

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

সামুদ্রিক তলদেশ বিহারী; গভীরতার পরিসীমা 0 - 500 m (Ref. 54710).   Deep-water; 48°N - 22°N, 118°E - 145°E (Ref. 54710)

বিতরণ দেশ সমূহ | এফ এ ও এলাকাসমূহ | বাস্তুতন্ত্র | দৃষ্টিগোচর | Point map | প্রচলন | Faunafri

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

আকৃতি / ওজন / Age

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

Short description সনাক্তকারী নির্দেশক | বহিঃ অঙ্গ সংস্থান | মরফোমেট্রিক্স

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).

জীববিজ্ঞান     শব্দকোষ (উদাহরণ স্বরূপ 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 Maturities | প্রজনন | Spawnings | Egg(s) | Fecundities | শুককীট

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

Main reference Upload your references | সূত্র সংখ্যা | সমম্বয়কারী : Compagno, Leonard J.V. | সহযোগী

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. 130435)

  Least Concern (LC) ; Date assessed: 27 August 2019

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless




Human uses

মৎস্য: বাণিজ্যিক
FAO(মৎস্য: species profile; publication : search) | FishSource |

আরো তথ্য

Trophic ecology
খাদ্যসামগ্রী
Diet compositions
Food consumptions
Food rations
শিকারী প্রাণী সমূহ
Population dynamics
Growths
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversions
Recruitments
Abundances
Life cycle
প্রজনন
Maturities
Fecundities
Spawnings
Spawning aggregations
Egg(s)
Egg developments
শুককীট
শুককীটের সত্রিুয়তা
Anatomy
Gill areas
মস্তিস্ক সমূহ
Otoliths
Physiology
Body compositions
Nutrients
Oxygen consumptions
-এর সাতাঁরের ধরণ
Swimming speeds
Visual pigment(s)
মৎস্য শব্দ
Diseases / Parasites
Toxicities (LC50s)
Genetics
বংশানুগতিবিদ্যা
Electrophoreses
Heritabilities

হাতিয়ার

Special reports

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ইন্টারনেট সুত্র

Estimates based on models

Preferred temperature (Ref. 115969): 7.7 - 21.8, mean 17.4 (based on 199 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 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).
ট্রফিক পর্যায়ে (Ref. 69278):  3.8   ±0.58 se; based on food items.
স্থিতিস্থাপক (Ref. 120179):  নিম্ন/ , সর্বনিম্ন প্রজন দ্বিগুনের সময় ৪.৪-১৪ বৎসর (Fec=12).
Fishing Vulnerability (Ref. 59153):  Very high vulnerability (82 of 100).
Price category (Ref. 80766):   High.