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Biological characteristics of blue shark, Prionace glauca, in the Mediterranean Sea

Published online by Cambridge University Press:  06 May 2009

Persefoni Megalofonou ,
Dimitris Damalas  and
Gregorio de Metrio
Persefoni Megalofonou*
Affiliation:
Department of Biology, Section of Zoology–Marine Biology, University of Athens, Greece
Dimitris Damalas
Affiliation:
Department of Biology, Section of Zoology–Marine Biology, University of Athens, Greece
Gregorio de Metrio
Affiliation:
Department of Animal Health and Welfare, University of Bari, Italy
*
Correspondence should be addressed to: P. Megalofonou, Department of Biology, Section of Zoology–Marine Biology, University of Athens, Greece email: [email protected]
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Abstract

A total of 870 blue sharks ranging from 70 to 349 cm in total length (LT) were sampled from the swordfish longline fishery in the Mediterranean Sea during the period 1998–2003. Males predominated and the sex-ratio (1:1.8) showed an increase in the proportion of males as size of fish increased. Gonad observation revealed that females smaller than 120 cm LT had immature ovaries with no mature oocytes, while mature ovaries with visible yolky oocytes were present in specimens larger than 203 cm LT. Ovary weight varied from 4–137 g and maximum oocyte diameter was 21.1 mm in mature females. All males smaller than 125 cm LT were immature while males larger than 187 cm LT were mature, as indicated by the presence of heavily calcified claspers, which extended beyond the posterior end of the pelvic fins. Length at 50% maturity (L50) was estimated to be 202.9 cm LT for males and 214.7 cm LT for females. Age estimates using caudal vertebrae ranged from 1 to 12 years, while age at 50% maturity was estimated at 4.9 years for males and 5.5 year for females.

Keywords

blue sharksex-ratioagegrowthsexual maturityMediterranean
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 89 , Issue 6 , September 2009 , pp. 1233 - 1242
Copyright
Copyright © Marine Biological Association of the United Kingdom 2009

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References

REFERENCES

Aasen, O. (1966) Blahaien, Prionace glauca (Linnaeus, 1758). Fisken og Havet 1, 1–15.Google Scholar
Bianchi, I., Clò, S. and Costantini, M. (1997) Med-Tag and Baby shark: two projects for tagging sharks. First results, considerations and prospects. Quaderni della Civica Stazione Idrobiologica di Milano. 22, 137–146.Google Scholar
Buencuerpo, V., Rios, S. and Moron, J. (1998) Pelagic sharks associated with the swordfish, Xiphias gladius, fishery in the eastern North Atlantic Ocean and the Strait of Gibraltar. Fishery Bulletin 96, 667–685.Google Scholar
Cailliet, G.M., Martin, L.K., Kusher, D., Wolf, P. and Welden, B.A. (1983) Techniques for enhancing vertebral bands in age estimation of California elasmobranchs. In Prince, E.D. and Pulos, L.M. (eds) US Department of Commerce, NOAA Technical Report NMFS 8, 157–165.Google Scholar
Cailliet, G.M. (1990) Elasmobranch age determination and verification: an updated review. In Pratt, H.L. Jr, Gruber, S.H and Taniuchi, T. (eds) Elasmobranchs as living resources: advances in the biology, ecology, systematics, and status of the fisheries. NOAA Technical Report 90, 157–165.Google Scholar
Casey, J.G. (1982) Blue shark, Prionace glauca. Species synopsis. In Grosslein, M.D. and Azarovitz, T. (eds) Ecology of the Middle Atlantic Bight fish and shellfish—Monograph 15, Fish Distribution, 45–48.Google Scholar
Castro, J.A. and Mejuto, J. (1995) Reproductive parameters of blue shark, Prionace glauca, and other sharks in the Gulf of Guinea. Marine and Freshwater Research 46, 967–973.CrossRefGoogle Scholar
Castro, J.I., Woodley, C.M. and Brudek, R.L. (1999) A preliminary evaluation of the status of shark species. FAO FisheriesTechnical Papers, 380, Rome, 72 pp.Google Scholar
Chen, C.T., Leu, T.C., Joung, S.J. and Lo, N.C.H. (1990) Age and growth of the scalloped hammerhead, Sphyrna lewini, in northeastern Taiwan waters. Pacific Science 44, 156–170.Google Scholar
Compagno, L.J.V. (1984) FAO species catalogue. Volume 4: Sharks of the World: an annotated and illustrated catalogue of shark species known to date. Part 2: Carchariniformes. FAO Fish Synopsis 125, 251–655.Google Scholar
Connett, S. (1987) Blue sharks studied in the eastern Atlantic. In Casey, J., Pratt, H.L. Jr, Kohler, N.E. and Stillwell, C.E. (eds) The shark tagger: 1987 summary. US Department of Commerce, NMFS, 12 pp.Google Scholar
Cortés, E. (2000) Life history patterns and correlations in sharks. Reviews in Fisheries Science 8, 299–344.CrossRefGoogle Scholar
De Metrio, G., Petrosino, G., Montanaro, C., Matarrese, A., Lenti, M. and Cecere, E. (1984) Survey on summer–autumn population of Prionace glauca L. (Pisces, Chondricthyes) during the four-year period 1978–1981 and its incidence on swordfish (Xiphias gladius L.) and albacore (Thunnus alalunga (Bonn)) fishing. Oebalia 10, 105–116.Google Scholar
Filanti, T., Megalofonou, P., Petrosino, G. and De Metrio, G. (1986) Incidenza dei Selaci nella pesca del pesce spada con long-line nel Golfo di Taranto. Nova Thalassia 8, 667–669.Google Scholar
Froese, R. and Pauly, D. (eds) (2005). FishBase. World Wide Web electronic publication. Available at http://www.fishbase.org/Google Scholar
Henderson, A.C., Flanery, K. and Dunne, J. (2001) Observations on the biology and ecology of the blue shark in the North-east Atlantic. Journal of Fish Biology 58, 1347–1358.Google Scholar
Hisaw, F.L.Jr and Hisaw, F.L. (1959) Corpora lutea of elasmobranch fishes. Anatomical Record 135, 269–277.CrossRefGoogle ScholarPubMed
Holden, M.J. and Raitt, D.F.S. (1974) Manual of fisheries science. Part 2. Methods of resource investigations and their application. Rome: FAO, 214 pp.Google Scholar
King, M. (1995) Fisheries biology, assessment and management. Oxford: Fishing New Books, 341 pp.Google Scholar
Kohler, N.E., Turner, P.A., Hoey, J.J., Natanson, L.J. and Briggs, R. (2002) Tag and recapture data for three pelagic shark species: blue shark (Prionace glauca), shortfin mako (Isurus oxyrinchus), and porbeagle (Lamna nasus) in the North Atlantic Ocean. Collected Volumes of the Scientific Papers of ICCAT 54, 1231–1260.Google Scholar
Lance, V. and Callard, I.P. (1969) A histochemical study of ovarian function in the ovoviviparous elasmobranch, Squalus acanthias. General and Comparative Endocrinology 13, 255–267.CrossRefGoogle ScholarPubMed
Maruska, K.P., Cowie, E.G. and Tricas, T.C. (1996) Periodic gonadal activity and protracted mating in elasmobranch fishes. Journal of Experimental Zoology 276, 219–232.3.0.CO;2-Q>CrossRefGoogle Scholar
Megalofonou, P., Damalas, D. and Yannopoulos, C. (2005a) Composition and abundance of pelagic shark by-catch in the eastern Mediterranean Sea. Cybium 29, 135–140.Google Scholar
Megalofonou, P., Yannopoulos, C., Damalas, D., De Metrio, G., Deflorio, M., de la Serna, J.M. and Macias, D. (2005b) Incidental catch and estimated discards of pelagic sharks from the swordfish and tuna fisheries in the Mediterranean Sea. Fishery Bulletin 103, 620–634.Google Scholar
Mollet, H.F., Cliff, G., Pratt, H.L. Jr and Stevens, J.D. (2000) Reproductive biology of the female shortfin mako, Isurus oxyrinchus Rafinesque, 1810, with comments on the embryonic development of lamnoids. Fishery Bulletin 98, 299–318.Google Scholar
Nakano, H. (1994) Age, reproduction and migration of blue shark in the North Pacific Ocean. Bulletin of the National Research Institute of Far Seas Fisheries Enyosuikenho 31, 141–256.Google Scholar
Natanson, L.J. and Kohler, N.E. (1996) A preliminary estimate of age and growth of the dusky shark Carcharhinus obscurus from the south-west Indian Ocean, with comparison to the western North Atlantic population. South African Journal of Marine Science 17, 217–224.CrossRefGoogle Scholar
Parsons, G.R. and Grier, H.J. (1992) Seasonal changes in shark testicular structure and spermatogenesis. Journal of Experimental Zoology 261, 173–184.CrossRefGoogle Scholar
Pomi, C. (1997) Morphometric study of Prionace glauca (Linnaeus, 1758) in the Central and Northern Adriatic Sea. Quaderni della Civica Stazione Idrobiologica di Milano. 22, 159–161.Google Scholar
Pratt, H.L. (1979). Reproduction in the blue shark, Prionace glauca. Fishery Bulletin 77, 445–470.Google Scholar
Skomal, G.B. and Natanson, L.J. (2003) Age and growth of the blue shark (Prionace glauca) in the North Atlantic Ocean. Fishery Bulletin 101, 627–639.Google Scholar
Spare, P. and Venema, S.C. (1992) Introduction to tropical fish stock assessment. Part I. Manual. FAO Fisheries Technical Paper, 306. Rome: FAO, 376 pp.Google Scholar
Soldo, A., Megalofonou, P., Bianchi, I. and Macias, D. (2007) Blue shark Prionace glauca (Linnaeus, 1758). In Cavanagh, R.D. and Gibson, C. (eds) (2007). Overview of the conservation status of cartilaginus fishes (Chondrichthyans) in the Mediterranean Sea. Gland, Switzerland and Malaga, Spain: IUCN, pp. 1–42.Google Scholar
Stevens, J.D. (1975) Vertebral rings as a means of age determination in the blue shark (Prionace glauca L.). Journal of the Marine Biological Association of the United Kingdom 55, 657–665.CrossRefGoogle Scholar
Stevens, J.D. (1976) The ecology of the blue shark (Prionace glauca L.) in British waters. PhD thesis. University of London.Google Scholar
Tanaka, S., Cailliet, G.M. and Yudin, K.G. (1990) Differences in growth of the blue shark, Prionace glauca: technique or population. In Pratt, H.L. Jr, Gruber, S.H. and Taniuchi, T. (eds) Elasmobranchs as living resources: advances in the biology, ecology, systematics, and the status of the Fisheries. NOAA Technical Report NMFS 90, 177–188.Google Scholar
TeWinkel, L.E. (1972) Histological and histochemical studies of post-ovulatory and pre-ovulatory atretic follicles in Mustelus canis. Journal of Morphology 163, 433–458.CrossRefGoogle Scholar
Whelan, K. (1991) The sea angler in Ireland. Dublin: Country House.Google Scholar
Wourms, J.P. (1977) Reproduction and development in chondrichthyan fishes. American Zoologist 17, 379–410.CrossRefGoogle Scholar
Zar, J.H. (1996) Biostatistical analysis, 3rd edition. Upper Saddle River, New Jersey: Prentice-Hall, pp. 662Google Scholar