Taxonomic research on Squalus megalops (Macleay, 1881) and Squalus blainvillei (Risso, 1827) (Chondrichthyes: Squalidae) in Tunisian waters (central Mediterranean Sea)

Authors

  • Sondes Marouani Institut National des Sciences et Technologies de la Mer
  • Raja Chaâba Institut National des Sciences et Technologies de la Mer
  • Hasna Kadri Institut National des Sciences et Technologies de la Mer
  • Bechir Saidi Institut National des Sciences et Technologies de la Mer
  • Abderrahmen Bouain Faculté des Sciences de Sfax
  • Ferruccio Maltagliati Università di Pisa Dipartimento di Biologia Unità di Biologia Marina e Ecologia
  • Peter Last CSIRO Marine and Atmospheric Research
  • Bernard Séret Muséum national d’Histoire naturelle, Département Systématique et Evolution
  • Mohamed Nejmeddine Bradai Institut National des Sciences et Technologies de la Mer

DOI:

https://doi.org/10.3989/scimar.03440.22B

Keywords:

Squalus megalops, Squalus blainvillei, taxonomy, Gulf of Gabès, Central Mediterranean

Abstract


Two species of spurdog of the genus Squalus occur in the Gulf of Gabès (southern Tunisia, central Mediterranean): the longnose spurdog Squalus blainvillei (Risso, 1827) and a short-snout spurdog of the Squalus megalops-cubensis group. Morphometric and meristic data as well as a genetic analyses (DNA inter-simple sequence repeat markers and molecular barcoding methods) support the assignation of this short-snout spurdog to Squalus megalops (Macleay, 1881). Squalus megalops occurs commonly in temperate and tropical Australian waters, and is also thought to occur in the eastern Atlantic, southern Indian Ocean and western North Pacific although these records need to be confirmed. Our study confirms that it occurs in the Mediterranean Sea. Populations of both S. blainvillei and S. megalops are described based on Tunisian material.

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References

Bass A.J., D’Aubrey J.D., Kistnasamy N. 1976. Sharks of the east coast of southern Africa. VI. The families Oxynotidae, Squalidae, Dalatiidae and Echinorhinidae. Invest. Rep. Oceanogr. Res. Inst. Durban 45: 1-103.

Bigelow H.B., Schroeder W.C. 1948. Fishes of the Western North Atlantic. Part One. Lancelets, Cyclostomes, Sharks. Mem. Sears Found. Mar. Res. 1(1): 1-576.

Bigelow H.B., Schroeder W.C. 1957. A study of the sharks of the suborder Squaloidea. Bull. Mus. Comp. Zool. 117: 1-150.

Bradai M.N., Quignard J.P., Bouain A., Jarboui O., Ouanes-Ghorbel A., Ben Abdallah L., Zaouli J., Ben Salem S. 2004. Ichtyofaune autochtone et exotique des côtes tunisiennes: Recensement et Biogéographie. Cybium 28(24): 315-328.

Chen C., Taniuchi T., Nose Y. 1979. Blainville’s dogfish, Squalus blainville, from Japan, with notes on S. mitsukurii and S. japonicus. Jpn. J. Ichthyol. 26: 26-44.

Compagno L.J.V. 1984. FAO species catalogue: Sharks of the World. An annotated and illustrated catalogue of shark species known to date. Part 1. Hexanchiformes to Lamniformes. F.A.O. Fish. Synop. 125(4)1: 1-250.

Compagno L.J.V., Dando M., Fowler S. 2005. A Field Guide to the Sharks of the World. Harper Collins Publishing Ltd., London, 368 pp.

Duffy J.A.C., Last P.R. 2007. Redescription of the Northern Spiny Dogfish Squalus griffini Phillipps, 1931 from New Zealand. In: Last P.R., White W.T., J.J. Pogonoski (eds.), Descriptions of new dogfishes of the genus Squalus (Squaloidea: Squalidae). C.M.A.R. pp. 91-101.

Garrick J.A.F. 1960. Studies on New Zealand Elasmobranchii. Part XII. The species of Squalus from New Zealand and Australia; and a general account and key to the New Zealand Squaloidea. Trans. R. Soc. N Z 88: 519-557.

Gupta M., Sinha S., Chandra P. 1994. Uptake and toxicity of metals in Scirpus lacustris L. and Bacopa monniferi L. J. Environ. Sci. Health. A 29(10): 2185-2202. http://dx.doi.org/10.1080/10934529409376173

Last P.R., Stevens J.D. 1994. Sharks and Rays of Australia. CSIRO 513 pp.

Last P.R., White W.T., Pogonoski J.J., Gledhill D.C., Yearsley G.K., Ward D.C. 2007a. Application of a rapid taxonomic approach to the genus Squalus. In: Last P.R., White W.T., Pogonoski J.J. (eds.), Descriptions of new dogfishes of the genus Squalus (Squaloidea: Squalidae). C.M.A.R. pp. 1-10.

Last P.R., Edmunds M., Yearsley G.K. 2007b. Squalus crassispinus sp. nov., a new spurdog of the ‘megalopscubensis group’ from the eastern Indian Ocean. In: Last P.R., White W.T., Pogonoski J.J. (eds.), Descriptions of new dogfishes of the genus Squalus (Squaloidea: Squalidae). C.M.A.R. pp. 11-22.

Ledoux J.C. 1970. Affinités et origines du Squalus blainvillei de Méditerranée. J. Ichthyol. 3: 65-69.

Leigh-Sharpe W.H. 1920. The comparative morphology of the secondary sexual characters of elasmobranch fishes. Mem. I. J. Morphol., 34(1): 245-265.

Maltagliati F., Casu M., Lai T., Iraci Sareri D., Casu D., Curini Galletti M., Cantone G., Castelli A. 2005. Taxonomic distinction of Ophelia barquii and O. bicornis (Annelida, Polychaeta) in the Mediterranean as revealed by ISSR markers and the number of nephridiopores. J. Mar. Biol. Ass. UK 85: 835-841. http://dx.doi.org/10.1017/S0025315405011781

Merrett N.R. 1973. A new shark of the genus Squalus (Squalidae: Squaloidea) from the equatorial western Indian Ocean; with notes on Squalus blainvillei. J. Zool. 171: 93-110. http://dx.doi.org/10.1111/j.1469-7998.1973.tb07518.x

Miller M.P. 1997. Tools for population genetic analyses (TFPGA 1.3): a windows program for the analysis of allozyme and molecular population genetic data. Computer software distributed by the author at http://bioweb.usu.edu/mpmbio/index.htm.

Molina G.I. 1782. Saggio sulla storia naturale del Chile, del Signor Abate Giovanni Ignazio Molina. Bologna. Saggio Chile i-v + 306 pp.

Muñoz-Chápuli R., Ramos F., Garcia Garrido C.M. 1984. Squalus megalops (Mac Leay, 1882) en el Mediterráneo. Notas sobre su diagnosis, sistematica y distribucion. Bull. Soc. Cat. Ictio. Herp. 9: 16-21.

Muñoz-Chápuli R., Ramos F. 1989. Morphological comparison of Squalus blainvillei and S. megalops in the eastern Atlantic, with notes on the genus. Jpn. J. Ichthyol. 36: 6-21.

Myagkov N.A., Kondyurin V.V. 1986. Dogfishes Squalus (Squalidae), of the Atlantic Ocean and comparative notes on the species of this genus from other regions. Vopr. Ihtiol. 26: 560-575 (in Russian).

Nei M. 1978. Estimation of average heterozygosity and genetic distance from a small number of individuals. Genetics 89: 583-590. PMid:17248844    PMCid:1213855

Risso A. 1827. Histoire naturelle des principales productions de l’Europe méridionale, et particulièrement de celles des environs de Nice et des Alpes maritimes. F.G. Levrault, Paris et Strasbourg xvi +480 pp.

Serena F., Papaconstantinou C., Relini G., De Sola L.G., Bertrand J.A. 2009. Distribution and abundance of spiny dogfish in the Mediterranean Sea based on the Mediterranean International Trawl Survey Program. In: Gallucci V.F., McFarlane G.A., Bargmann G.G. (eds.), Biology and Management of Dogfish Sharks. Am. Fish. Soc. pp. 139-149.

Springer V.G., Garrick J.A.F. 1964. A survey of vertebral numbers in Sharks. Proc. U.S. natl. Mus. 116: 73-96.

Rogers D.J., Tanimoto T.T. 1960. A computer program for classifying plants. Science 132: 1115-1118. http://dx.doi.org/10.1126/science.132.3434.1115 PMid:17790723

Ward R.D., Holmes B.H., Zemlak T.S., Smith P.J. 2007. DNA barcoding discriminates spurdogs of the genus Squalus. In: Last P.R., White W.T., Pogonoski J.J. (eds.), Descriptions of new dogfishes of the genus Squalus (Squaloidea: Squalidae). C.M.A.R. pp. 117-130.

Zietckiewicz E., Rafalsky A., Labuda D. 1994. Genome fingerprinting by Inter-Simple Sequence Repeat (ISSR)-anchored polymerase chain reaction amplification. Genomics 20: 176-183. http://dx.doi.org/10.1006/geno.1994.1151 PMid:8020964

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Published

2012-03-30

How to Cite

1.
Marouani S, Chaâba R, Kadri H, Saidi B, Bouain A, Maltagliati F, Last P, Séret B, Nejmeddine Bradai M. Taxonomic research on Squalus megalops (Macleay, 1881) and Squalus blainvillei (Risso, 1827) (Chondrichthyes: Squalidae) in Tunisian waters (central Mediterranean Sea). scimar [Internet]. 2012Mar.30 [cited 2023Jan.29];76(1):97-109. Available from: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1313

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