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Raja straeleni Poll, 1951
BISCUIT SKATE
Life   Vertebrata   Fish   Rajidae   Raja


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http://www.fishbase.org/Summary/speciesSummary.php?genusname=Raja&speciesname=straeleni ---> http://www.fishbase.org/summary/Raja-straeleni.html
http://www.fishbase.org/summary/Raja-straeleni.html ---> https://www.fishbase.in/summary/Raja-straeleni.html

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Common name (e.g. trout)

Genus + Species (e.g. Gadus morhua)

Raja straeleni Poll , 1951

Spotted skate Add your observation in Fish Watcher
Native range | All suitable habitat | Point map | Year 2100
This map was computer-generated and has not yet been reviewed.
Raja straeleni   AquaMaps   Data sources: GBIF OBIS
Upload your photos  and  videos
Pictures | Google image Image of Raja straeleni (Spotted skate) Raja straeleni
Picture by Zsilavecz, G.

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

Elasmobranchii (sharks and rays) > Rajiformes (Skates and rays) > Rajidae (Skates) > Rajinae
Etymology: Raja: Latin, raja, -ae = a sting ray (Raja sp.) (Ref. 45335 ) ;   straeleni: Named after V. Van Straelen, director of IRSNB, Belgium (Ref. 377 ) .  More on author: Poll .

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

Marine; demersal; oceanodromous; depth range 80 - 800 m (Ref. 11284 ), usually 100 - 300 m (Ref. 26999 ).   Tropical; 15°N - 30°S

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

Eastern Atlantic: Rio de Oro, Western Sahara to South Africa.

Size / Weight / Age

Maturity: L m   ?   range ? - ? cm
Max length : 70.0 cm TL male/unsexed; (Ref. 26999 ); 67.0 cm TL (female); max. published weight: 1.4 kg (Ref. 377 ); max. published weight: 1.4 kg

Short description Morphology | Morphometrics

A black-spotted skate with a blunt, angular snout, a long, stout tail, and a broad angular disc; strong thorns on upper surface of disc and tail at all stages, sometimes on underside in large individuals (Ref. 5578 ). Brown to grey dorsally, with small to large black spots, whorls and blotches; many with gold and black, traversely oblong eyespot on each pectoral base; white ventrally with no dark pores (Ref. 5578 ). Juveniles have no dark spots above (Ref. 2708 ).

Biology     Glossary (e.g. epibenthic)

Found in shallow enclosed bays and on the slope (Ref. 5578 ). Feeds on invertebrates, bony fishes and fish offal. Oviparous (Ref. 50449 ). Eggs have horn-like projections on the shell (Ref. 205 ). Caught by shore and ski-boat anglers and by hake trawlers. Pectoral fins sold as 'skate wings' (Ref. 5578 ). Undergoes regular migration, towards the coast during the warm season and towards deep waters in winter (Ref. 5377 ).

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

Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449 ).

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. 120744 )

  Data deficient (DD)  ; Date assessed: 05 September 2003

CITES (Ref. 115941 )

Not Evaluated

CMS (Ref. 116361 )

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: commercial; gamefish: yes FAO(Publication : search ) | FishSource |

More information

Countries
FAO areas
Ecosystems
Occurrences
Introductions
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Ecology
Diet
Food items
Food consumption
Ration
Common names
Synonyms
Metabolism
Predators
Ecotoxicology
Reproduction
Maturity
Spawning
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Fecundity
Eggs
Egg development
Age/Size
Growth
Length-weight
Length-length
Length-frequencies
Morphometrics
Morphology
Larvae
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Recruitment
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References
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Aquaculture profile
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Tools

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Special reports

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Download XML

Summary page | Point data | Common names | Photos

Internet sources

Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes ( gen. , sp. ) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank( genome , nucleotide ) | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Tree of Life | Wikipedia( Go , Search ) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on models

Preferred temperature (Ref. 115969 ): 10.2 - 15.7, mean 12.3 (based on 76 cells). Phylogenetic diversity index (Ref. 82805 ):  PD 50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high]. Bayesian length-weight: a=0.00275 (0.00124 - 0.00609), b=3.25 (3.07 - 3.43), in cm Total Length, based on LWR estimates for this Genus-body shape (Ref. 93245 ). Trophic Level (Ref. 69278 ):  4.0   ±0.62 se; Based on food items. Resilience (Ref. 69278 ):  Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100). Vulnerability (Ref. 59153 ):  Moderate vulnerability (45 of 100) . Price category (Ref. 80766 ):   Medium .

Entered by Luna, Susan M. Modified by Sampang-Reyes, Arlene G. Fish Forum
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