New data on the rare deep-sea skate Amblyraja jenseni (Rajidae) from the North Atlantic Ocean

Abstract

In this study we present the most complete description of color variation, morphometric and meristic characters for the rare deep-sea North Atlantic Jensen’s skate Amblyraja jenseni, based on analyses of a wide range of accessible material. Comparisons of external morphological characters of male and female specimens of varying sizes and from different regions of the North Atlantic indicated regional morphological differences likely due to prolonged geographic isolation of local populations of this species. The vast majority of individuals exhibited a “dark” coloration, with a less common “light” coloration observed particularly among skates from the waters of the northeast and northwest Atlantic. Only dark-colored skates were found in the waters of the Mid-Atlantic Ridge. We also provide new data on the habitat, vertical distribution and size of the Jensen’s skate.

This is a preview of subscription content, log in to check access.

References

  1. Alpoim, R., Avial de Melo, A., Bañon, R., et al., Distribution and main characteristic of fish species on Flemish Cap based on the 1988-2002 EU-Surveys in July, in NAFO SCR Document 02/72, Serial No. N4685, Dartmouth: NAFO Headquarters, 2002.

    Google Scholar 

  2. Bigelow, H.B. and Schroeder, W.C., Notes on Northwest Atlantic sharks and skates, Bull. Mus. Comp. Zool., 1927, vol. 68, pp. 237–251.

    Google Scholar 

  3. Bigelow, H.B. and Schroeder, W.C., New and little known cartilaginous fishes from the Atlantic, Bull. Mus. Comp. Zool., 1950, vol. 103, pp. 385–408.

    Google Scholar 

  4. Bigelow, H.B. and Schroeder, W.C., Sawfishes, guitarfishes, skates and rays, in Fishes of the Western North Atlantic, TeeVan, J., et al., Eds., New Haven: Sears Found. Mar. Res., Yale Univ., 1953, vol. 1, part 2.

  5. Coad, B.W. and Reist, J.D., Annotated list of the Arctic marine fishes of Canada, Can. Manuscr. Rep. Fish. Aquat. Sci., 2004, no. 2674, pp. 1–118.

    Google Scholar 

  6. Cousins, N.J., Linley, T.D., Jamieson, A.J., et al., Bathyal demersal fishes of Charlie-Gibbs Fracture Zone region (49–54° N) of the Mid-Atlantic Ridge: II. Baited camera lander observations, Deep Sea Res., Part II, 2013, vol. 98, pp. 397–406.

    Article  Google Scholar 

  7. Dolganov, V.N., The origin and distribution of rays of the suborder Rajoidei in the World Ocean, J. Ichthyol., 2002, vol. 42, suppl. 1, pp. 1–22.

    Google Scholar 

  8. Ebert, D.A. and Stehmann, M.F.W., Sharks, batoids, and chimaeras of the North Atlantic, FAO Spec. Cat. Fish. Purp., 2013, no 7.

  9. George, M.R. and Zidowitz, H., Checkliste der europäischen Knorpelfisharten mit wissenschaftlichen und deutschen Namen, Z. Fischkund., 2006, vol. 8, pp. 71–81.

    Google Scholar 

  10. Goodwin, H.B., Skate and ray management in the Northwest Atlantic: an overview of current management and recommendations for conservation, MSc Thesis, Halifax: Dalhousie Univ., 2012.

    Google Scholar 

  11. Gordon, J.D.M. and Duncan, J.A.R., Deep-sea bottomliving fishes at two repeat stations at 2200 and 2900 m in the Rockall Trough, northeastern Atlantic Ocean, Mar. Biol., 1987, vol. 96, pp. 309–325.

    Article  Google Scholar 

  12. Gordon, J.D.M. and Duncan, J.A.R., A note on distribution and diet of deep-water rays (Rajidae) in an area of the Rockall Trough, J. Mar. Biol. Ass. U.K., 1989, vol. 69, pp. 655–658.

    Article  Google Scholar 

  13. Halliday, R.G., Themelis, D.E., and Hickey, W.M., Demersal fishes caught with bottom gillnets and baited gears at 500–2800 m on the continental slope off Nova Scotia, Canada, J. Northw. Atl. Fish. Sci., 2012, vol. 44, pp. 31–40.

    Article  Google Scholar 

  14. Hubbs, C.L. and Ishiyama, R., Methods for taxonomic study and description of skates (Rajidae), Copeia, 1968, no. 3, pp. 483–491.

    Article  Google Scholar 

  15. Johnston, G., O’Hea, B., and Dransfeld, L., Fish species recorded during deepwater trawl survey on the continental shelf and the Porcupine Bank, 2006–2008, Irish Nat. J., 2010, vol. 31, pp. 130–134.

    Google Scholar 

  16. Karrer, C., Über Fischarten aus der Davisstrasse und Labradorsee, Mitt. Zool. Mus. Ber., 1976, vol. 52, pp. 371–376.

    Article  Google Scholar 

  17. Kenchington, E., Power, D., and Koen-Alonso, M., Associations of demersal fish with sponge grounds on the continental slopes of the Northwest Atlantic, Mar. Ecol. Progr. Ser., 2013, vol. 477, pp. 217–230.

    Article  Google Scholar 

  18. Kirpichnikov, V.S., Genetika i selektsiya ryb (Genetics and Breeding of Fishes). Leningrad: Nauka, 1987.

    Google Scholar 

  19. Kulka, D., Orlov, A., and Barker, A., Jensen’s skate Amblyraja jenseni (Bigelow and Schroeder, 1950), in Report of the IUCN Shark Specialist Group Northeast Atlantic Red List Workshop “The Conservation of Northeast Atlantic Chondrichthyans” Gibson, C., et al., Eds., Newbury: IUCN Spec. Surv. Comm., Shark Spec. Group, 2008.

    Google Scholar 

  20. Leim, A.H. and Scott, W.B., Fishes of the Atlantic coast of Canada, Bull. Fish. Res. Bd. Can., 1966, no. 155, pp. 1–485.

    Google Scholar 

  21. Møller, P.R., Nielsen, J.G., Knudsen, S.W., et al., A checklist of the fish fauna of Greenland waters, Zootaxa, 2010, no. 2378, pp. 1–84.

    Article  Google Scholar 

  22. Moore, J.A., Hartel, K.E., Craddock, J.E., and Gallbraith, J.K., An annotated list of deepwater fishes from off the New England region, with new area records, Northeast Nat., 2003, no. 10, pp. 159–248.

    Article  Google Scholar 

  23. Neat, F., Burns, F., Drewery, J., The deepwater ecosystem of the continental shelf slope and seamounts of the Rockall Trough: a report on the ecology and biodiversity based on FRS scientific surveys, in Fisheries Research Services Internal Report No 02/08, Aberdeen: Fish. Res. Serv., 2008.

    Google Scholar 

  24. Nielsen, J.G. and Bertelsen, E., Fisk i Grønlandske Farvande, Nuuk: Atuakkiorfik, 1992.

    Google Scholar 

  25. Orlov, A.M., On the justification of commercial measure for the Far East skates (fam. Rajidae) for an example of mass western Bering Sea species, Tr. VNIRO, 2006, vol. 146, pp. 252–264.

    Google Scholar 

  26. Orlov, A.M., New data on rare deep-water Mid-Atlantic skate Rajella kukujevi (Rajidae), J. Ichthyol., 2014, vol. 54, no. 5, pp. 317–337.

    Article  Google Scholar 

  27. Orlov, A.M. and Cotton, C.F., Sexually dimorphic morphological characters in five North Atlantic deepwater skates (Chondrichthyes: Rajiformes), J. Mar. Biol., 2011, Article ID 842821. doi: 10.1155/2011/842821

    Google Scholar 

  28. Orlov, A.M. and Cotton, C.F., New data on rare deepwater North Atlantic skate Bathyraja pallida (Forster, 1967) (Arhynchobatidae, Rajiformes), J. Ichthyol., 2013, vol. 53, no. 7, pp. 465–477.

    Article  Google Scholar 

  29. Orlov, A., Cotton, C., and Byrkjedal, I., Deepwater skates (Rajidae) collected during the 2004 cruises of RV G.O. Sars and M.S. Loran in the Mid-Atlantic Ridge area, Cybium, 2006, vol. 30, suppl., pp. 35–48.

    Google Scholar 

  30. Orlov, A.M., Cotton, C.F., and Shevernitsky, D.A., Sexual dimorphism of external morphological characters in some deepwater skates (Rajidae, Rajiformes, Chondrichthyes) of the North Atlantic, Moscow Univ. Biol. Sci. Bull., 2010, vol. 65, no. 1, pp. 40–44.

    Article  Google Scholar 

  31. Quero, J.-C., Lorance, P., and Tardy, E., Observations ichtyologiques effectuees en 1999 a bord du navire de recherche “Thalassa”, Ann. Soc. Sci. Nat. Chart.-Marit., 2000, vol. 8, pp. 1047–1058.

    Google Scholar 

  32. Séret, B., Guide des Requins, des Raies et des Chimères des Pêches Françaises, Paris: IRD, 2010.

    Google Scholar 

  33. Silva, J.F., Ellis, J.R., and Catchpole, T.L., Species composition of skates (Rajidae) in commercial fisheries around the British Isles and their discarding patterns, J. Fish. Biol., 2012, vol. 80, pp. 1678–1703.

    CAS  Article  PubMed  Google Scholar 

  34. Stehmann, M.F.W. and Merrett, N.R., First records of advanced embryos and egg capsules of Bathyraja skates from the deep north-eastern Atlantic, J. Fish. Biol., 2001, vol. 59, pp. 338–349.

    Article  Google Scholar 

  35. Stehmann, M.F.W., Séret, B., Costa, E.M., and Baro, J., Neoraja iberica n. sp., a new species of pygmy skate (Elasmobranchii, Rajidae) from the southern upper slope of the Iberian Peninsula (Eastern North Atlantic), Cybium, 2008, vol. 32, pp. 51–71.

    Google Scholar 

  36. Sulak, K.J., MacWhirter, P.D., Luke, K.E., et al., Identification guide to skates (family Rajidae) of the Canadian Atlantic and adjacent regions, Can. Tech. Rept. Fish. Aquat. Sci., 2009, no. 2850, pp. 1–34.

    Google Scholar 

  37. Tempelman, W., Some abnormalities in skates (Raja) of the Newfoundland area, J. Fish. Res. Bd. Can., 1965, vol. 22, pp. 237–238.

    Article  Google Scholar 

  38. Vázquez, A., Casas, J.M., Brodie, W.B., et al., List of species as recorded by Canadian and EU bottom trawl survey in Flemish Cap, in NAFO SCR Document 13/005, Serial No. N6154, Dartmouth: NAFO Headquarters, 2013.

    Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to A. M. Orlov.

Additional information

The article is published in the original.

Materials of the paper were presented at the 16th annual scientific conference of the European Elasmobranch Association (Milan, Italy, November 22–25, 2012).

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Orlov, A.M., Cotton, C.F. New data on the rare deep-sea skate Amblyraja jenseni (Rajidae) from the North Atlantic Ocean. J. Ichthyol. 55, 478–496 (2015). https://doi.org/10.1134/S0032945215040086

Download citation

Keywords

  • Jensen’s skate
  • Amblyraja jenseni
  • external morphology
  • color
  • morphometrics
  • meristics
  • dimorphism
  • North Atlantic