New Zealand country information

Common names: Smooth skate, Uku
Occurrence: endemic
Salinity: marine
Abundance: occasional (usually not seen) | Ref: Doonan, I.J., M. Dunn and A.C. Hart, 2009
Importance: commercial | Ref: Armitage, R.O., D.A. Payne, G.J. Lockley, H.M. Currie, R.L. Colban, B.G. Lamb and L.J. Paul (eds.), 1994
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Occurs throughout New Zealand, usually in deeper waters to 200 m (Ref. 9258). Recorded in trawl surveys in Chathams Island (Ref. 45493) and off the east coast of South Island (Ref. 58461). Caught throughout the year, mainly with trawls but also with lines (Ref. 9258). Exported to Europe, especially France. Voucher specimen(s) held at the NMNZ (Ref. 5755).
National Checklist:
Country Information: httpss://www.cia.gov/library/publications/resources/the-world-factbook/geos/nz.html
National Fisheries Authority: https://www.fish.govt.nz/
Occurrences: Occurrences Point map
Main Ref: Cox, G. and M. Francis, 1997
National Database:

Classification / Names

Elasmobranchii (sharks and rays) > Rajiformes (Skates and rays) > Rajidae (Skates)
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL

Common names from other countries

Smooth skate, Raya dentada, Nieuw-zeelandse gladde rog, ... more

Main reference

McEachran, J.D. and K.A. Dunn. 1998. (Ref. 27314)
References | Biblio | Coordinator : McEachran, John | Collaborators

Size / Weight / Age

Max length : 240 cm TL male/unsexed; (Ref. 26346); common length : 80.0 cm TL male/unsexed; (Ref. 9258); max. reported age: 24 years (Ref. 47618)

Length at first maturity
L_m 112.0 range ? - ? cm

Environment

Marine; demersal; depth range 15 - 1310 m (Ref. 26346)

Climate / Range

Deep-water, preferred ?; 29°S - 56°S, 158°E - 174°W

Distribution

Southwest Pacific: endemic to New Zealand.
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Grey with scattered charcoal blotches dorsally, greyish-white ventrally (Ref. 26346).

Occurs in coastal waters, continental shelf and upper slope (Ref. 26346). Usually found in deeper waters to 200 m (Ref. 9258). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).

IUCN Red List Status (Ref. 115185)

Near Threatened (NT)

Threat to humans

Harmless

Human uses

Fisheries: commercial

More information

Countries
FAO areas
Ecosystems
Occurrences
Introductions
Stocks
Ecology
Diet
Food items
Food consumption
Ration

Common names
Synonyms
Metabolism
Predators
Ecotoxicology
Reproduction
Maturity
Spawning
Fecundity
Eggs
Egg development

Age/Size
Growth
Length-weight
Length-length
Length-frequencies
Morphometrics
Morphology
Larvae
Larval dynamics
Recruitment
Abundance

References
Aquaculture
Aquaculture profile
Strains
Genetics
Allele frequencies
Heritability
Diseases
Processing
Mass conversion

Collaborators
Pictures
Stamps, Coins
Sounds
Ciguatera
Speed
Swim. type
Gill area
Otoliths
Brains
Vision

Tools

Special reports

Check for Aquarium maintenance | Check for Species Fact Sheets | Check for Aquaculture Fact Sheets

Download XML

Summary page | Point data | Common names | Photos

Internet sources

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805)
PD₅₀ = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Trophic Level (Ref. 69278)
4.1 ±0.7 se; Based on size and trophs of closest relatives

Resilience (Ref. 69278)
Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100)

Vulnerability (Ref. 59153)
Very high vulnerability (80 of 100)

Price category (Ref. 80766)
Medium

Dipturus innominatus (Garrick & Paul, 1974)