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Raja cortezensis McEachran and Miyake, 1988
CORTEZ RAY
Cortez Skate

Life   Vertebrata   Fish   Rajidae   Raja

Raja cortezensis
© Copyright Ross Robertson, 2006 · 12
Raja cortezensis

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Raja cortezensis
© Copyright Ross Robertson, 2006 · 12
Raja cortezensis
espa˝ol

Overview
Main identification features
  • disc: front borders straight
  • thorns: 1row on tail
  • disc center: dark/pale spots
  • pectoral: +/- ocellus
Rhomboidal disc of flattened, pointed head, body and pectoral fins; front edges of disc straight; pelvic fins with 2 distinct lobes, rear one large; large spiracles behind eyes; snout rigid; spines on rear borders only of ventral side; 2 small dorsal fins at rear of tail, no tail fin; spines on disc small, thin, not grooved, with oval bases; 34-37 rows of teeth in upper jaw; small thorns around eye and spiracle; no thorns on shoulders; short row large thorns on midback behind eye; 1 row of small thorns on tail before dorsal fin, 1-3 thorns between dorsal fins.

Upper surface brown; center of disc with scattered small dark spots or eye-sized mid-brown blotches; sometimes with 1-2 small ocelli on pectoral, at rear and opposite nape; lower surface pale.

Size: 36 cm.

Habitat: soft bottom.

Depth: 15-90 m.

Lower 2/3 of Baja and the lower 2/3 of the Gulf of California to Panama.


Attributes
Abundance: Common.
Cites: Not listed.
Climate Zone: Northern Subtropical (Cortez Province + Sinaloan Gap); Northern Tropical (Mexican Province to Nicaragua + Revillagigedos); Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo); North Temperate (Californian Province &/or Northern Gulf of California).
Depth Range Max: 90 m.
Depth Range Min: 15 m.
Diet: bony fishes; mobile benthic crustacea (shrimps/crabs); mobile benthic worms; mobile benthic gastropods/bivalves; octopus/squid/cuttlefish.
Eastern Pacific Range: Northern limit=31; Southern limit=-6; Western limit=-117; Eastern limit=-78; Latitudinal range=37; Longitudinal range=39.
Egg Type: Benthic; No pelagic larva; No pelagic phase.
Feeding Group: Carnivore.
FishBase Habitat: Demersal.
Global Endemism: Tropical Eastern Pacific (TEP) endemic; East Pacific endemic; All species.
Habitat: Mud; Soft bottom (mud, sand,gravel, beach, estuary & mangrove); Soft bottom only; Sand & gravel.
Inshore Offshore: Inshore; Inshore Only.
IUCN Red List: Not evaluated / Listed.
Length Max: 36 cm.
Regional Endemism: Continent only; Continent; TEP endemic; Continental TEP endemic; 3 provinces (Cortez + Mexican + Panamic) endemic; All species.
Residency: Resident.
Salinity: Marine; Marine Only.
Water Column Position: Bottom; Bottom only;


Names
Scientific source:

Links to other sites

References
  • Compagno, L.J.V., 1999., Checklist of living elasmobranchs. In Hamlett W.C. (ed.) Sharks, skates, and rays: the biology of elasmobranch fishes., The John Hopkins University Press:471-498.
  • Findley, L.T., Hendrickx, M.E., Brusca, R.C., van der Heiden, A.M., Hastings, P.A., Torre, J., 2003., Diversidad de la Macrofauna Marina del Golfo de California, Mexico., CD-ROM versiˇn 1.0. Projecto de la Macrofauna del Golfo .á Derechos reservados de los autores y Conservaciˇn Internacional.
  • Fischer , W. , Krup , F. , Schneider , W. , Sommer , C. , Carpenter , K. E. and Niem, V. H., 1995., Guia FAO para la Identificacion de Especies de para los fines de la Pesca. Pacifico Centro-Oriental. Volumen II. Vertebrados - Parte 1., FAO2:647-1200.
  • McEachran , J. D. and Miyake, T., 1988., A new species of skate from the Gulf of California (Chondrichthyes, Rajoidei)., Copeia, 1988:877-886.
  • McEachran , J.D.and Dunn, K.A., 1998., Phylogenetic analysis of skates, a morphologically conservative clade of Elasmobranchs (Chondrichthyes: Rajidae)., Copeia, 1998:271-290.

Acknowledgements

I thank Ashley MacDonald and John Pickering, University of Georgia, for technical support in building this page.


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

Common name (e.g. trout)

Genus + Species (e.g. Gadus morhua)

Beringraja cortezensis (McEachran & Miyake , 1988)

Cortez skate Upload your photos  and  videos
Pictures | Videos |     Google image Image of Beringraja cortezensis (Cortez skate) Beringraja cortezensis
Picture by Robertson, R.

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: Beringraja: Named for the Bering Sea, though to be the origin of the two species in this genus. .

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

Marine; demersal; depth range 15 - 90 m (Ref. 114953 ), usually ? - 80 m (Ref. 9261 ).   Subtropical; 28°N - 25°N, 113°W - 108°W (Ref. 114953 )

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

Eastern Central Pacific: endemic to Gulf of California (Mexico)

Size / Weight / Age

Maturity: L m   ?   range ? - ? cm
Max length : 39.0 cm TL male/unsexed; (Ref. 114953 )

Biology     Glossary (e.g. epibenthic)

Benthic on the inner part of the continental shelf (Ref. 9261 ). Oviparous (Ref. 50449 ). Eggs have horn-like projections on the shell (Ref. 205 ). Males reaches maturity at ca. 34 cm TL (Ref. 114953 )

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: 01 December 2008

CITES (Ref. 115941 )

Not Evaluated

CMS (Ref. 116361 )

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: of no interest FAO(Publication : search ) | FishSource |

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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 | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805 ):  PD 50 = 0.5156   [Uniqueness, from 0.5 = low to 2.0 = high]. Bayesian length-weight: a=0.00282 (0.00128 - 0.00621), b=3.24 (3.06 - 3.42), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245 ). Trophic Level (Ref. 69278 ):  4.0   ±0.6 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 ):  Low to moderate vulnerability (33 of 100) .

Entered by Froese, Rainer Modified by Abucay, Luisa Fish Forum
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