Okamejei acutispina, Sharpspine skate

Okamejei acutispina (Ishiyama, 1958)

Sharpspine skate
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Okamejei acutispina   AquaMaps   Data sources: GBIF OBIS
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Image of Okamejei acutispina (Sharpspine skate)
Okamejei acutispina
Picture by The Fish Database of Taiwan

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (sharks and rays) > Rajiformes (Skates and rays) > Rajidae (Skates)

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

Marine; demersal; depth range 25 - 150 m (Ref. 106604). Temperate

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

Northwest Pacific: Japan to the East China Sea.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 45.0 cm TL male/unsexed; (Ref. 106604)

Biology     Glossary (e.g. epibenthic)

Sublittoral on sandy mud bottoms (Ref. 11230). Depth range given by H. Ishihara (pers.comm. 07/07). Feed on invertebrates and bony fishes (Ref. 9908). Oviparous. Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205). Eggs are oblong capsules with stiff pointed horns at the corners deposited in sandy or muddy flats (Ref. 205). Egg capsules are 4.9-5.4 cm long and 2.5-2.9 cm wide (Ref. 41249, 41253).

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

Oviparous (Ref. 9908). Paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205).

Main reference Upload your references | References | Coordinator : McEachran, John | Collaborators

McEachran, J.D. and K.A. Dunn, 1998. Phylogenetic analysis of skates, a morphologically conservative clade of elasmobranchs (Chondrichthyes: Rajidae). Copeia 1998(2):271-290. (Ref. 27314)

IUCN Red List Status (Ref. 130435: Version 2025-2 (Global))

  Vulnerable (VU) (A2d); Date assessed: 27 August 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Other (Ref. 10311)





Human uses

FAO - Publication: search | FishSource |

More information

Trophic ecology
Food items (preys)
Diet composition
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Ecology
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Length-length rel.
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Summary page | Point data | Common names | Photos

Internet sources

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | National databases | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoological Record

Estimates based on models

Phylogenetic diversity index
(Ref. 82804) 		PD50 = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.00309 (0.00144 - 0.00663), b=3.24 (3.07 - 3.41), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level
(Ref. 69278) 		4.0   ±0.62 se; based on food items.
Generation time 7.2 ( na - na) years. Estimated as median ln(3)/K based on 2 growth studies.
Resilience
(Ref. 120179) 		Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100).
Fishing Vulnerability
(Ref. 59153) 		Moderate to high vulnerability (54 of 100). 🛈
Nutrients
(Ref. 124155) 		Calcium = 17.6 [3.0, 82.8] mg/100g; Iron = 0.296 [0.079, 0.831] mg/100g; Protein = 17.2 [14.5, 19.8] %; Omega3 = 0.975 [0.309, 3.534] g/100g; Selenium = 7.51 [2.32, 23.13] μg/100g; VitaminA = 21.4 [6.5, 67.6] μg/100g; Zinc = 0.54 [0.26, 0.98] mg/100g (wet weight);