Rostroraja alba (Lacepède, 1803)

Bottlenosed skate

Catalog of Fishes (gen., sp.) | ITIS | CoL

Classification	Elasmobranchii \| Rajiformes \| Rajidae
Synonyms	Raja alba, Raia rostellata, Raja bicolor, ... more
Common names	Raie blanche, White skate, Raya bramante, ... more

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Image of Rostroraja alba (Bottlenosed skate)

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AquaMaps Data sources: GBIF OBIS

Main reference

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

Size / Weight / Age

Max length : 230 cm TL male/unsexed; (Ref. 11284); 202 cm TL (female)

Environment

Demersal; marine; depth range 30 - 600 m (Ref. 6808), usually 50 - 500 m (Ref. 26999)

Climate / Range

Subtropical; 56°N - 37°S, 19°W - 23°E

Eastern Atlantic: Ireland and England southward round the Cape (South Africa) to central Mozambique (Ref. 5578), including western Mediterranean (to Tunisia and western Greece).
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

A giant skate with a broad-based, abruptly narrow-tipped snout covered with small, sharp thorns; pectoral disc angular, and no thorns on nape or back, but three rows of large thorns on tail (Ref. 5578). Larger immature and adult individuals grey with numerous small white spots above, underside white with no black pores; hatchlings plain reddish-brown above, often with blue spots, and white below with broad dusky grey margins on disc (Ref. 5578).

Inhabit shelf and slope waters (Ref. 4426). Found on sand and rock-sand bottom (Ref. 6808). A bottom-predator of bony fishes, other elasmobranchs, fish offal, crabs, shrimps, mysids, octopi, and cuttlefish (Ref. 5578). Minimum depth reported taken from Ref. 4426. Maximum length for female is 202 cm (Ref. 41333). 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 12.5-18.3 cm long and 10.0-13.9 cm wide (Ref. 41250). About 55-156 eggs are produced per individual annually (Ref. 41250).


IUCN Red List Status (Ref. 57073)	Threat to humans
Endangered (EN) (A2cd+4cd)	Traumatogenic (Ref. 5578)

Human uses
Fisheries: minor commercial; gamefish: yes


More information
Countries FAO areas Ecosystems Occurrences Introductions Ecology Diet Food items Food consumption Ration	Common names Synonyms Metabolism Predators Ecotoxicology Reproduction Maturity Spawning Eggs Egg development	Age/Size Growth Length-weight Length-length Length-frequencies Morphometrics Morphology Larvae Larval dynamics Recruitment	Other references Biblio Aquaculture Aquaculture profile Strains Genetics Allele frequencies Heritability Diseases Processing	Collaborators Pictures Stamps Sounds Ciguatera Speed Swim. type Gill area Otoliths Brains Vision

Tools
Biogeographic modelling \| E-book \| Field guide \| Length-frequency wizard \| Life-history tool \| Point map

Special reports
Check for Aquarium maintenance \| Check for Species Fact Sheets \| Check for Aquaculture Fact Sheets

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Summary page \| Point data \| Common names \| Photos

Internet sources

Estimation of some characteristics with mathematical models

Resilience (Ref. 69278)

Low, minimum population doubling time 4.5 - 14 years (Fec=55)


Vulnerability (Ref. 59153)	Price category (Ref. 80766)
Very high vulnerability (84 of 100)	Medium

Entered by Agustin, Liza Q.

Modified by Luna, Susan M.

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Page last modified by : elaxamana, 15 July 2009

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