SHARKS FROM THE AMIRANTES ISLANDS, SEYCHELLES, WITH A DESCRIPTION OF TWO NEW SPECIES OF SQUALOIDS FROM THE DEEP SEA
In: Israel Journal of Ecology and EvolutionSearch for other papers by ALBERT BARANES in
Current site
Google Scholar
During a research cruise conducted in December 1998 off Alphonse Island, Seychelles, sharks were collected. A large specimen identified as Pseudotriakis microdon presents morphometrics different from those of specimens from other areas. Carcharhinus amblyrhynchos, C. albimarginatus, and Sphyrna lewini are compared with Red Sea populations. Centroscymnus coelolepis is recorded for the first time in the western Pacific. Species from the family Squalidae were collected and identified as: Centrophorus granulosus, Centrophorus seychellorum n. sp., and Squalus lalannei n. sp. Squalus lalannei belongs to the acanthias group sharing the posterior position of the first dorsal fin, a simple nasal flap, and a low number of precaudal vertebrae. It differs from Squalus acanthias by a higher and wider first dorsal, a smaller second dorsal positioned posteriorly, and the lack of white spots. Centrophorus seychellorum n.sp. is closely related to C. granu-losus, but differs by its snout shape and size. It is shown that this species presents sexual dimorphism in snout length and shape of the upper jaw teeth. The validity of characteristics such as snout-length, shape of dermal denticles, and pectoral fins for squalid identification is discussed.
Purchase
Buy instant access (PDF download and unlimited online access):
Institutional Login
Log in with Open Athens, Shibboleth, or your institutional credentials
Personal login
Log in with your brill.com account
-
Compagno, L.J.V. 2001. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Vol. 2. Bullhead, mackerel and carpet sharks (Heterodontiformes, Lamniformes and Orectolobiformes). FAO Species Catalogue for Fishery Purposes. No. 1, Vol. 2, FAO, 269 pp.
-
Compagno, L.J.V. 1981. Sharks. In: Fischer, W., Bianchi, G., Scott, W.B., eds. FAO species identification sheets for fishery purposes. Eastern Central Atlantic, Fishing Areas 34, 47 (in part. Ottawa Dept. Fish. and Oceans, by arrangement with FAO. Vol. 5, pag. var.
-
Compagno, L.J.V. 1984. FAO species catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. FAO Fish. Synop., (125) Vol. 4, part 1, pp. 1-250; part 2, pp. 251-655.
-
Compagno, L.J.V. 1988. Sharks of the order Carcharhiniformes. Princeton Univ. Press, Princeton, New Jersey, 486 pp.
-
Compagno, L.J.V. 1999. Systematics and body form, and checklist of living elasmobranchs. In: Hamlett, W.C., ed. Sharks, skates, and rays, The biology of elasmobranch fishes. Johns Hopkins Univ. Press, Baltimore, pp. 1-42 and 471-498.
-
Yano, K., Musick, J.A. 1992. Comparison of morphometrics of Atlantic and Pacific specimens of the false catshark, Pseudotriakis microdon, with notes on stomach contents. Copeia 1992: 877-886.
-
Taniuchi, T., Kobayashi, H., Otake, T. 1984. Occurrence and reproductive mode of the false cat shark Pseudotriakis microdon in Japan. Jpn. J. Ichthyol. 31: 88-92.
-
Compagno, L.J.V. 1979. Carcharhinoid sharks: morphology, systematics and phylogeny. Ph.D. thesis, Stanford University, 932 pp. Available from University Microfilms International, Ann Arbor, Michigan.
-
Cadenat, J. 1959c. Notes d'ichthyologie ouest-africaine. 23. Sur la valeur relative de la morphologie des spicules dans la syst�matique du genre Centrophorus. Bull. Inst. Fr. Afr. Noire (A. Sci. Nat.) 21: 748-756.
-
Cadenat, J. 1964. Notes d'Ichtyologie ouest-Africaine. XLI. Les Sphyraenidae de la c�te occidentale d'Afrique. Bull. Inst. Fr. Afr. Noire, Dakar (A) 26: 659-685, 5 pls.
-
Chen, C., Taniuchi, T., Nose, Y. 1979. Blainville's dogfish, Squalus blainville, from Japan, with notes on S. mitsukurii and S. japonicus. Jap. J. Ichthyol. 26: 26-42.
-
Fourmanoir, P., Rivaton, J. 1979. Poissons de la pente recifale externe de Nouvelle-Caledonie et des Nouvelles-Hebrides. Cah. Indo-Pac. 4: 405-443.
-
Gilbert, C.R. 1967. A revision of the hammerhead sharks (Family Sphyrnidae). Proc. U.S. Natl. Mus. 119: 88.
-
Cadenat, J. 1959b. Notes d'ichthyologie ouest-africaine. 22. Centrophorus lusitanicus Bocage et Capello, 1864 (S�lacien, Squalidae), esp�ce valable diff�rente de C. granulosus. Bull. Inst. Fr. Afr. Noire (A. Sci. Nat.) 21: 743-746.
-
Macleay, W. 1882. Descriptive catalogue of the fishes of Australia. Part 4. Proc. Linn. Soc. N.S.W. 6: 202-386.
-
McEachran, J.D., Seret, B. 1987. Allocation of the name Sphyrna tudes (Valenciennes, 1822) and status of the nominal species Sphyrna couardi Cadenat, 1951 (Chondrichthyes, Sphyrnidae). Cybium 11: 39 - 46.
-
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. London. 171: 93-110.
-
Randall, J.E, van Egmond, J. 1994. Marine fishes from the Seychelles: 108 new records. Zool. Verh. Leiden 297: 43-83.
-
Reif, W.E. 1985. Squamation and ecology of sharks. Cour. Forsch.-Inst. Senckenb. 78: 1-255.
-
Shirai, S. 1992. Squalean phylogeny. A new framework of "Squaloid" sharks and related taxa. Hokkaido Univ. Press, Sapporo.
-
Shirai, S. 1996. Phylogenetic interrelationships of neoselachians (Chondrichthyes, Euselachii). In: Interrelationships of fishes. Stiassny, M.L.J., Parenti, L.R., Johnson, G.D., eds. 9-34. Academic Press, San Diego, pp. 9-34.
-
Smith, J.L.B., Smith, M.M. 1963 and 1969 (new edition). The fishes of Seychelles. Rhodes Univ., Grahamstown, pp. 1-215, pls. 1-98.
-
Springer, V.G., Garrick, J.A.F. 1964. A survey of vertebral numbers in sharks. Proc. U.S. Natl. Mus. 116: 73-96.
-
Baranes, A. 1986. Comparative systematics and reproduction of the carcharhinid sharks of the Northern Red Sea. Ph.D. thesis, Hebrew Univ., Jerusalem, 213 pp.
-
Bass, A.J., D'Aubrey, J.D., Kistnasamy, N. 1973. Sharks of the east coast of southern Africa. 1. The genus Carcharhinus (Carcharinidae). Invest. Rep. Oceanogr. Res. Inst., Durban 33: 168.
-
Bass, A.J., D'Aubrey, J.D., Kistnasamy, N. 1975. Sharks of the east coast of southern Africa. 2. The families Scyliorhinidae and Pseudotriakidae. Invest. Rep. Oceanogr. Res. Inst., Durban 37: 64.
-
Bass, A.J., D'Aubrey, J.D., Kistnasamy, N. 1976. Sharks of the east coast of southern Africa. 6. The families Oxynotidae, Squalidae, Dalatiidae and Echinorhinidae. Invest. Rep. Oceanogr. Res. Inst., Durban 45: 103.
-
Debelius, H. 1993. Indian (Tropical Fish Guide) Ocean. Aquaprint, Ikan, Frankfurt, 321 pp.
-
Yano, K., Tanaka, S. 1983. Portuguese shark, Centroscymnus coelolepis from Japan, with notes on C. owstoni. Jpn. J. Ichthyol. 30: 208-218.
-
Ellis, J.R., Shackley S.E. 1995. Ontogenic changes and sexual dimorphism in the head, mouth and teeth of the lesser spotted dogfish. J. Fish Biol. 47: 155-164.
-
Forster, G.R., Badcock, J.R., N.R. Longbottom, N.R. Merrett, Thomson, K.S. 1970. Results of the Royal Society Indian Ocean Deep Slope Fishing Expedition, 1969. Proc. R. Soc. London, Ser. B 175: 367-404.
-
Garrick, J.A.F. 1960. Studies on New Zealand Elasmobranchii. Part 12. 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.
-
Deynat, P.P., S�ret, B. 1996. Le rev�tement cutan� des raies (Chondrichthyes, Elasmobranchii, Batoidea), I--Morphologie et arrangement des denticules cutan�s. Ann. Sci. Nat., Zool., Paris 17: 65-83.
-
Raschi, W.G., Tabit, C. 1992. Functional aspects of placoid scales: a review and updates. Aust. J. Mar. Freshwater Res. 43: 123-147.
-
Bigelow, H.B., Schroeder, W.C. 1948. Sharks. Mem. Sears Found. Mar. Res. (1): 53-576.
-
Bigelow, H.B., Schroeder, W.C. 1954. Deep water elasmobranchs and chimaeroids from the northwestern Atlantic slope. Bull. Mus. Comp. Zool. Harvard 112: 38-87.
-
Bigelow, H.B., Schroeder, W.C. 1957. A study of the sharks of the suborder Squaloidea. Bull. Mus. Comp. Zool. Harvard Univ. 117: 150.
-
Cadenat, J. 1950. Rapport sur les S�laciens des c�tes du S�n�gal et plus sp�cialement sur les Requins. Bull. Inst. Fr. Afr. Noire 12: 944-75.
-
Cadenat, J. 1959a. Notes d'ichthyologie ouest-africaine. 21. Le genre Atractophorus Gilchrist 1922, stade juv�nile de Centrophorus M�ller et Henle, 1837 (S�lacien Squalidae). Bull. Inst. Fr. Afr. Noire (A. Sci. Nat.) 21: 735-738.
-
Garrick, J.A.F. 1982. Sharks of the genus Carcharhinus. NOAA Tech. Rep. NMFS Circ. 445: 194.
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 314 | 173 | 7 |
| Full Text Views | 16 | 0 | 0 |
| PDF Views & Downloads | 13 | 0 | 0 |
SHARKS FROM THE AMIRANTES ISLANDS, SEYCHELLES, WITH A DESCRIPTION OF TWO NEW SPECIES OF SQUALOIDS FROM THE DEEP SEA
In: Israel Journal of Ecology and EvolutionSearch for other papers by ALBERT BARANES in
Current site
Google Scholar
PubMed
During a research cruise conducted in December 1998 off Alphonse Island, Seychelles, sharks were collected. A large specimen identified as Pseudotriakis microdon presents morphometrics different from those of specimens from other areas. Carcharhinus amblyrhynchos, C. albimarginatus, and Sphyrna lewini are compared with Red Sea populations. Centroscymnus coelolepis is recorded for the first time in the western Pacific. Species from the family Squalidae were collected and identified as: Centrophorus granulosus, Centrophorus seychellorum n. sp., and Squalus lalannei n. sp. Squalus lalannei belongs to the acanthias group sharing the posterior position of the first dorsal fin, a simple nasal flap, and a low number of precaudal vertebrae. It differs from Squalus acanthias by a higher and wider first dorsal, a smaller second dorsal positioned posteriorly, and the lack of white spots. Centrophorus seychellorum n.sp. is closely related to C. granu-losus, but differs by its snout shape and size. It is shown that this species presents sexual dimorphism in snout length and shape of the upper jaw teeth. The validity of characteristics such as snout-length, shape of dermal denticles, and pectoral fins for squalid identification is discussed.
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 314 | 173 | 7 |
| Full Text Views | 16 | 0 | 0 |
| PDF Views & Downloads | 13 | 0 | 0 |
