Hostname: page-component-586b7cd67f-2brh9 Total loading time: 0 Render date: 2024-11-24T13:48:27.274Z Has data issue: false hasContentIssue false
  • English
  • Français

On the occurrence of the bluntnose sixgill shark, Hexanchus griseus (Chondrichthyes: Hexanchidae), in the Sea of Marmara

Published online by Cambridge University Press:  26 May 2009

Hakan Kabasakal
Hakan Kabasakal*
Affiliation:
Ichthyological Research Society, Atatürk mahallesi, Menteşoğlu caddesi, İdil apt., No: 30/4, Ümraniye, TR-34764 İstanbul, Turkey
*
Correspondence should be addressed to: H. Kabasakal, Ichthyological Research Society, Atatürk mahallesi, Menteşoğlu caddesi, İdil apt., No: 30/4, Ümraniye, TR-34764 İstanbul, Turkey email: [email protected]
Get access

Abstract

Field surveys and literature review revealed the capture of 50 bluntnose sixgill sharks from the Sea of Marmara. Total lengths of the observed specimens ranged from 1.2–6 m, and weighed between 10 and 1000 kg. Nine specimens were males, 23 were females and 18 were of unknown sex. Regarding the bathymetric distribution of the captured bluntnose sixgill sharks, majority of the specimens (78%) were recorded in slope and shelf waters of the eastern and northern Sea of Marmara. Fishing presents the only known proximate threat to bluntnose sixgill shark populations in Marmaric waters. Inclusion of Hexanchus griseus in the endangered marine fish list of the Turkish Fisheries Act, would be the first step before subjecting H. griseus to 100% protection.

Keywords

bluntnose sixgill sharkHexanchus griseusSea of Marmaraoccurrenceconservationfishing pressure
Type
Research Article
Information
Marine Biodiversity Records , Volume 2 , January 2009 , e110
Copyright
Copyright © Marine Biological Association of the United Kingdom 2009

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Akşıray, F. (1987) Türkiye Deniz Balıkları Ve Tayin Anahtarı. 2nd edition. Publication No. 3490. Istanbul: Istanbul University.Google Scholar
Barrull, J. and Mate, I. (2000) Biología de la cañbota Hexanchus griseus (Bonnaterre, 1788) en el Mar Mediterráneo. Boletín de la Asociación Española de Elasmobranquios 3, 13–20.Google Scholar
Capapé, C., Guélorget, O., Barrull, J., Mate, I., Hemida, F., Seridji, R., Bensaci, J. and Bradäi, M.N. (2003) Records of the bluntnose six-gill shark, Hexanchus griseus (Bonnaterre, 1788) (Chondrichthyes: Hexanchidae) in the Mediterranean Sea: a historical survey. Annales Series Historia Naturalis 13, 157–166.Google Scholar
Carey, F.G. and Clark, E. (1995) Depth telemetry from the sixgill shark, Hexanchus griseus, at Bermuda. Environmental Biology of Fishes 42, 7–14.CrossRefGoogle Scholar
Castro, J. (1983) The sharks of North American waters. College Station, Texas: Texas A&M University Press.Google Scholar
Cavanagh, R. and Kyne, P.M. (2005) The conservation status of deep-sea chondrichthyan fishes. In Shottoni, R. (ed.) Deep Sea 2003: conference on the governance and management of deep-sea fisheries. Part 2: Conference poster papers and workshop papers. Queenstown, New Zealand, 1–5 December 2003 and Dunedin, New Zealand, 27–29 November 2003. FAO Fisheries Proceedings. No. 3/2. Rome: FAO, 487 pp.Google Scholar
Celona, A., De Maddalena, A. and Romeo, T. (2005) Bluntnose sixgill shark, Hexanchus griseus (Bonnaterre, 1788), in the eastern north Sicilian waters. Bollettino del Museo Civico di Storia Naturale di Venezia 56, 137–151.Google Scholar
COSEWIC (2007) COSEWIC assessment and status report on the bluntnose sixgill shark Hexanchus griseus in Canada. Ottawa Committe on the Status of Endangered Wildlife in Canada. vii + 33 pp. (www.sararegistry.gc.ca/status/status_e.cfm).Google Scholar
Deveciyan, K. (1926) Pêche et Pécheries en Turquie. İstanbul: Imprimerie de l'Administration de la Dette Publique Ottomane. (Türkiye'de Balık Ve Balıkçılık, Turkish edition published in 2006, Aras, İstanbul.)Google Scholar
Dunbrack, R. and Zielinski, R. (2003) Seasonal and diurnal activity of sixgill sharks (Hexanchus griseus) on a shallow water reef in the Strait of Georgia, British Columbia. Canadian Journal of Zoology 81, 1107–1111.CrossRefGoogle Scholar
Ebert, D. (1986) Biological aspects of the sixgill shark, Hexanchus griseus. Copeia 1, 131–135.CrossRefGoogle Scholar
Kabasakal, H. (1998a) Shark and ray fisheries in Turkey. Shark News 11, 8.Google Scholar
Kabasakal, H. (1998b) The first record of the bluntnose six-gill shark [Hexanchus griseus (Bonnaterre, 1788)] in the Sea of Marmara. Acta Adriatica 39, 67–70.Google Scholar
Kabasakal, H. (2003) Historical and contemporary records of sharks from the Sea of Marmara, Turkey. Annales Series Historia Naturalis 13, 1–12.Google Scholar
Kabasakal, H. (2004) Preliminary observations on the reproductive biology and diet of the Bluntnose sixgill shark, Hexanchus griseus (Bonnaterre, 1788) (Chondrichthyes: Hexanchidae), in Turkish Seas. Acta Adriatica 45, 187–196.Google Scholar
Kabasakal, H. (2006) Distribution and biology of the bluntnose sixgill shark, Hexanchus griseus (Bonnaterre, 1788) (Chondrichthyes: Hexanchidae), from Turkish waters. Annales Series Historia Naturalis 16, 29–36.Google Scholar
Kocataş, A., Koray, T., Kaya, M. and Kara, Ö.F. (1993) Review of the fishery resources and their environment in the Sea of Marmara. Studies and Reviews, No. 64. Fisheries and environment studies in the Black Sea system. General Fisheries Council for the Mediterranean. Rome: FAO, pp. 87–143.Google Scholar
Lipej, L., De Maddalena, A. and Soldo, A. (2004) Sharks of the Adriatic Sea. Koper: Knjižnica Annales Majora.Google Scholar
Lorance, P., Latrouite, D. and Séret, B. (2000) Observations of chondrichthyan fishes (sharks, rays and chimaeras) in the Bay of Biscay (north-eastern Atlantic) from submersibles. In Séret, B. and Sire, j.-Y. (eds) Proceedings of the 3rd European Elasmobranch Association MeetingBoulogne-sur-Mer1999. Paris: Société Française d'Ichtyologie & l'Institut de Recherche pour le Développement, pp. 29–45.Google Scholar
Meriç, N. (1995) A study on existence of some fishes on the continental slope of the Sea of Marmara. Turkish Journal of Zoology 19, 191–198.Google Scholar
Ninni, E. (1923) Primo Contributo allo Studio dei Pesci e della Pesca nelle Acque dell'Impero Ottomano. Venezia: Premiate Officine Grafiche Carlo Ferrari.Google Scholar
Priede, I.G., Froese, R., Bailey, D.M., Bergstad, O.A., Collins, M.A., Dyb, J.E., Henriques, C., Jones, E.G. and King, N. (2006) The absence of sharks from abyssal regions of the world's oceans. Proceedings of the Royal Society, London 273, 1435–1441.Google Scholar