Antarctic Starry Skate, Amblyraja georgiana (Norman 1938)


Other Names: South Georgia Skate

Illustration of an Antarctic Starry Skate, Amblyraja georgiana. Source: FAO / FishBase. License: CC by Attribution-NonCommercial

Summary:
Occurs in the Southern Ocean in Australia's Antarctic and subantarctic waters.

Cite this page as:
Bray, D.J. 2018, Amblyraja georgiana in Fishes of Australia, accessed 22 Aug 2018, http://fishesofaustralia.net.au/Home/species/5426

Antarctic Starry Skate, Amblyraja georgiana (Norman 1938)

More Info


Distribution

Occurs in AUS subantarctic/Antarctic waters. Elsewhere the species is possibly circum-Antarctic in the Southern Ocean.

Feeding

Feeds opportunistically on a range of benthic fishes and invertebrates. Large individuals feed mostly on bony fishes, while juveniles consume mostly polychaete worms, and crustaceans.

Biology

Females lay paired oblong egg capsules which have four horn-like thorns on each corner and measure 11.6 x 8 cm. The developing embryos feed solely on yolk.Young are born at 16-18 cm TL, and size at maturity is estimated at 84 cm TL. 

Fisheries

The species is taken as bycatch in trawl and longline fisheries.

Species Citation

Raja georgiana Norman 1938, Discovery Reports 18: 4, Fig. 1. Type locality: East Cumberland Bay, South Georgia Island, Discovery station 39, South Atlantic, depth 179-235 m.

Author

Bray, D.J. 2018

Antarctic Starry Skate, Amblyraja georgiana (Norman 1938)

References


Endicott, M., Compagno, L.J.V. & Agnew, D.J. 2002. Identification of Amblyraja species in the longline fishery in Sub-area 48.3. CCAMLR, Hobart, Australia.

Endicott, M. R. & Kyne, P.M. 2009. Amblyraja georgiana. The IUCN Red List of Threatened Species 2009: e.T161490A5435813. http://dx.doi.org/10.2305/IUCN.UK.2009-2.RLTS.T161490A5435813.en. Downloaded on 04 April 2018.

Fischer, W. & Hureau, J.-C. (eds.) 1985. FAO species identification sheets for fishery purposes. Southern Ocean (fishing areas 48, 58 and 88) (CCAMLR convention area). Prepared and published with the support of the Commission for the Conservation of Antarctic Marine Living Resources. FAO, Rome, 232 pp.
Francis, M.P. 2003. Length-at-maturity of the Antarctic skates Amblyraja georgiana and Bathyraja eatonii in the Ross Sea. Document WG-FSA03/42. CCAMLR, Hobart, Australia.

Francis, M.P. & Maolagáin, C.Ó. 2001. Age and growth of the Antarctic skates, Bathyraja eatonii and Amblyraja georgiana. Document WG-FSA01/52. CCAMLR, Hobart, Australia. 

Francis, M.P. & Smith, N.W.McL. 2002. Morphometrics, maturity, and movement of the Antarctic skates Amblyraja georgiana and Bathyraja eatonii in the Ross Sea. Document WG-FSA02/42. CCAMLR, Hobart, Australia.

Francis, M.P. & Maolagáin, C.Ó. 2005. Age and growth of the Antarctic skate (Amblyraja georgiana) in the Ross Sea. CCAMLR Science 12 (2005): 183-194. PDF available, open access

Last, P.R., Séret, B., Stehmann, M.F.W. & Weigmann, S. 2016. Family Rajidae pp. 204-363. In: Last, P.R., White, W.T., de Carvalho, M.R., Séret, B., Stehmann, M.F.W. & & Naylor, G.J.P. (eds) Rays of the World. Melbourne: CSIRO Publishing, 800 pp.

Last, P.R., Weigmann, S. & Yang, L. 2016. Changes to the nomenclature of the skates (Chondrichthyes: Rajiformes), pp. 11-34. In: Last, P.R., White, W.T., de Carvalho, M.R., Séret, B., Stehmann, M.F.W. & & Naylor, G.J.P. (eds) Rays of the World. Melbourne: CSIRO Publishing, 800 pp.

McEachran, J.D. & Dunn, K.A. 1998. Phylogenetic analysis of skates, a morphologically conservative clade of elasmobranchs (Chondrichthyes: Rajidae). Copeia 1998(2): 271-290.

Stehmann, M. & Bürkel, D.L. 1990. Rajidae, pp. 86-97. In: Gon, O. & Heemstra, P.C. (eds) Fishes of the Southern Ocean. Grahamstown : J.L.B. Smith Institute of Ichthyology 462 pp.

Weigmann, S. 2016. Annotated checklist of the living sharks, batoids and chimaeras (Chondrichthyes) of the world, with a focus on biogeographical diversity. Journal of Fish Biology 88(3): 837-1037 https://doi.org/10.1111/jfb.12874 Abstract

Quick Facts


CAAB Code:37031753

Conservation:IUCN Data Deficient

Depth:150-800 m

Max Size:101 cm TL

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CAAB distribution map