| More

British sharks in Sicily: records of long distance migration of tope shark (Galeorhinus galeus) from North-eastern Atlantic to Mediterranean Sea.

Views: 662 Downloads: 312


The study reports information about the recapture of two tagged adult females of tope shark, Galeorhinus galeus (Linnaeus 1758), in the central Mediterranean Sea (south coasts of Sicily) in 2014 and 2017. The two females were tagged in North-East Atlantic, respectively in Scotland in 2009 and Ireland in 2015. The Scottish specimen was a 175 cm female increasing of about 10 kg in body weight and 37 cm in total length during its 1967 days at liberty (5.39 years). The Irish one, was a pregnant female of an estimated age of 15-17 year which spent 248 days at liberty increasing 14 cm during this period. The growth rate of the two specimens was therefore between 6.8 and 7.8 cm year-1, faster than the annual increments of adults suggested in previous studies. Previous tope recapture records in the Mediterranean Sea were limited to the Alboran Sea, coast of Valencia and the Algerian coasts. The two tope females recaptured in the Strait of Sicily provided the first evidence of long distance entrance of NE Atlantic tope in the Mediterranean Sea. The well known occurrence of mature females and juveniles in this area of the Mediterranean suggest the hypothesis of a migration of adults female from their feeding grounds in north eastern Atlantic to lower latitudes up to the Mediterranean Sea for parturition.


Tagging; Sharks migration; Tope shark,;central Mediterranean Sea.

Full Text:



Anonymous, 2016. MEDITS-handbook. Version 8. MEDITS Working Group, 177 pp.

Branstetter, S., 1984. Triakidae. p.117-121. In: Fishes of the north-western Atlantic and the Mediterranean. Whitehead, J.P., Bauchot, M.L., Hureau, J.C., Nielsen J., Tortonese, E. (Eds). Unesco, Paris.

Capapé, C., Mellinger, J., 1988. Nouvelles données sur la biologie de la reproduction du milandre, Galeorhinus galeus (Linné, 1758),(Pisces, Triakidae) des côtes tunisiennes. New data on the biology of reproduction in the tope, Galaeorhinus galeus (Linnaeus, 1758),(Pisces, Triakidae) along Tunisian coasts. Cahiers de biologie marine, 29 (1), 135–146.

Capapé, C., Tomasini, J.A., Quignard, J.P., 2000b. Les élasmobranches pleurotrêmes de la côte du Languedoc (France méridionale): observations biologiques et démographiques (Elasmobranchii Pleurotremata from the coast of Languedoc (southern France): biological and demographic observations). Vie Milieu, 50, 123-133.

Capapé, C., Ben Souissi, J., Méjri, H., Guélorget, O., Hemida, F., 2005. The reproductive biology of the school shark, Galeorhinus galeus Linnaeus 1758 (Chondrichthyes: Triakidae), from the Maghreb shore (southern Mediterranean). Acta Adriatica: international journal of Marine Sciences, 46(2), 109-124.

Compagno, L.V.J., 1984. Part 2. Carcharhiniformes p. 251-655. In: Sharks of the world. An annotated and illustrated catalogue of shark species known to date. FAO species catalogue, FAO, Fisheries synopsis.

Cox, G. J., Francis, M., 1997. Sharks and rays of New Zealand. Canterbury University Press, 68 pp.

Dureuil, M., 2013. Status and conservation of sharks in the Northeast Atlantic. MSc Thesis. GEOMAR, University of Kiel, Kiel, Germany, 130 pp.

Dureuil, M., Worm, B., 2015. Estimating growth from tagging data: an application to north‐east Atlantic tope shark Galeorhinus galeus. Journal of fish biology, 87(6), 1389-1410.

Ferretti, F., Myers, R. A., Sartor, P., Serena, F., 2005. Long term dynamics of the chondrichthyan fish community in the upper Tyrrhenian Sea. ICES CM, 25, 1-34.

Fitzmaurice P., Keirse G., Green P., Clarke M., 2003. Tope tagging in Irish Waters (1970-2002).

Central Fisheries Board, Mobhi Boreen, Glasnevin, Dublin 9, Ireland, Marine Institute, Abbotstown, Dublin 15, Ireland, Technical report, 30 pp.

Francis, M. P., 1998. New Zealand shark fisheries: development, size and management. Marine and Freshwater Research, 49(7), 579–591.

Holden M.J., Horrod R.G., 1979. The migrations of tope, Galeorhinus galeus (L), in the eastern North Atlantic as determined by tagging. Journal du Conseil International pour l'Exploration de la Mer , 38(3): 314-317.

Kabasakal, H., 2003. Historical and contemporary records of sharks from the Sea of Marmara, Turkey. Annales, Series. Historia. Naturalis., 13(1), 1-12.

Last, P. R., Stevens, J. D., 1994. Sharks and Rays of Australia. Commonwealth Scientific and Industrial Research Organization, Australia, 513 pp.

McCully, S., Dureuil, M., Farrell, E., 2015. Galeorhinus galeus. The IUCN Red List of Threatened Species. http://www.iucnredlist.org (Accessed 05 June 2018).

Megalofonou P., Yannopoulos C., Damalas D., De Metrio G., De Florio M., 2005. Incidental catch and estimated discards of pelagic sharks from the swordfish and tuna fisheries in the Mediterranean Sea. Fishery Bulletin, 103(4), 620-634.

Nieto, A. A., Ralph, G. M., Comeros‐Raynal, M. T., Kemp, J., Garcia Criado, M. et al., 2015. European Red List of marine fishes. Publications Office of the European Union, Luxembourg, 84 pp.

Olsen, A.M., 1954. The biology, migration, and growth rate of the school shark, (Galeorhinus australis (Macleay) (Carcharhinidae) in south-eastern Australian waters. Australian Journal of Marine and Freshwater Research, 5, 353-410.

Olsen, A. M., 1990. School shark tagging programme 1947-1956. Details of releases in and recoveries from

South Australian waters. Safish, 15(1), 5-8.

Punt, A.E., Walker T.I., Taylor B.L., Pribac F., 2000. Standardization of catch and effort data in a spatially-structured shark fishery. Fisheries Research, 45, 129-145.

Ragonese, S., Vitale, S., Dimech, M., Mazzola, S., 2013. Abundances of demersal sharks and chimaera from 1994-2009 scientific surveys in the central Mediterranean Sea. PloS one, 8(9), e74865.

Relini, G., Mannini, A., De Ranieri, S., Bitetto, I., Follesa, M. C. et al., 2010. Chondrichthyes caught during the medits surveys in italian waters/i condroitti pescati durante le campagne medits nelle acque italiane. Biologia Marina Mediterranea, 17(1), 186.-204.

Riede, K., 2004. Global register of migratory species - from global to regional scales. Federal Agency for Nature Conservation, Bonn, Germany, Final Report of the R&D-Projekt 808 05 081, 329 p.

Ripley, W. E., 1946. The biology of the soupfin Galeorhinus zygopterus and biochemical studies of the liver. California Fishery Bulletin, 64, 1-96.

Silva J. F., Ellis J. R., Ayers R. A., 2013. Length-weight relationships of marine fish collected from around the British Isles. Cefas Lowestoft, Science Series Technical Report, No 150, 109 pp.

Stevens, J.D., 2000. Galeorhinus galeus. The IUCN Red List of Threatened Species. http://www.iucnredlist.org (Accessed 12 June 2018).

Stevens, J. D., 2010. Epipelagic oceanic elasmobranchs. p. 3-35. In: Sharks and their Relatives II: Biodiversity, adaptive physiology and conservation. Carrier, J.C., Musick, J.A., Heithaus, M.R. (Eds). CRC Press, Boca Raton, Florida.

Stevens, J. D., West, G. J., 1997. Investigation of school and gummy shark nursery areas in southeastern Australia. CSIRO Marine Research, Technical report, 76 pp.

Walker, T.I., Cavanagh, R.D., Stevens, J.D., Carlisle, A.B., Chiaramonte, G.E. et al., 2006. Galeorhinus galeus. The IUCN Red List of Threatened Species. http://www.iucnredlist.org (Accessed 12 June 2018).

West, G. J., & Stevens, J. D., 2001. Archival tagging of school shark, Galeorhinus galeus, in Australia: initial results. p. 283-298. In: The behavior and sensory biology of elasmobranch fishes: an anthology in memory of Donald Richard Nelson . Balon, E.K. (Eds) Springer, Dordrecht.


  • There are currently no refbacks.