Denmark country information

Common names: Pletrokke
Occurrence: native
Salinity: marine
Abundance: occasional (usually not seen) | Ref: Muus, B.J. and P. Dahlstrøm, 1989
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Occurs in the western part of the North Sea and in Skagerrat along the coast of Norway (Ref. 6302).
National Checklist:
Country Information: httpss://www.cia.gov/library/publications/resources/the-world-factbook/geos/da.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Stehmann, M. and D.L. Bürkel, 1984
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

Raie fleurie, Raya santiguesa, Sandy ray, ... more

Main reference

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

Size / Weight / Age

Max length : 71.0 cm TL male/unsexed; (Ref. 41333); 68.0 cm TL (female); common length : 40.0 cm TL male/unsexed; (Ref. 3261)

Length at first maturity
L_m 57.5, range 45 - 71.8 cm

Environment

Marine; demersal; depth range 20 - 500 m, usually 20 - 250 m (Ref. 11284)

Climate / Range

Subtropical, preferred 20°C (Ref. 107945); 60°N - 15°N, 18°W - 36°E

Distribution

Eastern Atlantic: Kattegat (Ref. 3167) and North Sea, around Great Britain, Ireland and the Mediterranean to Morocco and Senegal.
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 0; Anal spines: 0; Anal soft rays: 0. Snout short; upper surface entirely spinulose, but centre of pectoral fins more or less bare in adults, underside smooth except for prickly front edges; generally 9-13 thorns in a complete row around inner margin of eye, and a large triangle of thorns on nape or shoulder region; two parallel rows of strong thorns on each side of midline along tail; upper surface ochre to light greyish-brown with a large roundish black eye-spot in middle of each pectoral fin, underside white (Ref. 3167)

Feed on all kinds of bottom animals (Ref. 3167). 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 5.0-7.0 cm long and 3.1-3.9 cm wide (Ref. 41250). Around 70-150 eggs are laid per individual annually (Ref. 41250).

IUCN Red List Status (Ref. 115185)

Least Concern (LC)

Threat to humans

Harmless

Human uses

Fisheries: commercial; aquarium: public aquariums

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)
4.2 ±0.3 se; Based on diet studies.

Resilience (Ref. 69278)
Low, minimum population doubling time 4.5 - 14 years (K=0.11-0.16; tm=8-9; tmax=28; Fec<100)

Vulnerability (Ref. 59153)
High vulnerability (62 of 100)

Price category (Ref. 80766)
Medium

Leucoraja naevus (Müller & Henle, 1841)