Ecology

Habitat

Known from seamounts and knolls
  • Stocks, K. 2009. Seamounts Online: an online information system for seamount biology. Version 2009-1. World Wide Web electronic publication.
Creative Commons Attribution 3.0 (CC BY 3.0)

© WoRMS for SMEBD

Source: World Register of Marine Species

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Depth range based on 31225 specimens in 29 taxa.
Water temperature and chemistry ranges based on 14078 samples.

Environmental ranges
  Depth range (m): -9 - 80000
  Temperature range (°C): 0.134 - 26.008
  Nitrate (umol/L): 0.202 - 43.616
  Salinity (PPS): 31.242 - 38.781
  Oxygen (ml/l): 0.266 - 7.662
  Phosphate (umol/l): 0.093 - 3.251
  Silicate (umol/l): 0.756 - 94.255

Graphical representation

Depth range (m): -9 - 80000

Temperature range (°C): 0.134 - 26.008

Nitrate (umol/L): 0.202 - 43.616

Salinity (PPS): 31.242 - 38.781

Oxygen (ml/l): 0.266 - 7.662

Phosphate (umol/l): 0.093 - 3.251

Silicate (umol/l): 0.756 - 94.255
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Associations

Known prey organisms

Raja preys on:
Fundulus
Loligo

Based on studies in:
USA: Massachusetts, Cape Ann (Marine, Sublittoral)

This list may not be complete but is based on published studies.
  • R. W. Dexter, The marine communities of a tidal inlet at Cape Ann, Massachusetts: a study in bio-ecology, Ecol. Monogr. 17:263-294, from p. 272 (1947).
Creative Commons Attribution 3.0 (CC BY 3.0)

© SPIRE project

Source: SPIRE

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
Specimen Records:745
Specimens with Sequences:599
Specimens with Barcodes:521
Species:26
Species With Barcodes:25
Public Records:364
Public Species:15
Public BINs:19
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© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Barcode data

Creative Commons Attribution 3.0 (CC BY 3.0)

© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Wikipedia

Raja (genus)

Raja is a genus of skates in the family Rajidae containing nearly 30 species. They are flat-bodied, cartilaginous fish with a rhombic shapes due to their large pectoral fins extending from or nearly from the snouts to the bases of their tails. Their sharp snouts are produced by a cranial projection of rostral cartilage. The mouth and gills are located on underside of the body. They may be either solid-coloured or patterned, and most skates have spiny or thorn-like structures on the upper surface, and some species contain weak electrical organs within their tails. Mating typically occurs in the spring and the female lays numerous eggs per clutch which are encapsulated in leathery cases, commonly known as "mermaid’s purses". Species vary in size. The hedgehog skate (R. erinacea) adult length is 50 cm or less. The big skate (R. binoculata) may be 2.5 metres long. These bottom-dwellers are active during both day and night, and typically feed on molluscs, crustaceans and fish. Skates are found in most parts of the world, from tropical to near arctic waters, from shallows to depths of more than 2,700 metres. Skates and related species have fossil records dating from the Upper Cretaceous period, thus this well adapted species is quite ancient.

Species[edit]

See also[edit]

References[edit]

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Source: Wikipedia

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