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Perciformes: Ephippidae) in the Arabian Sea Coast of Oman Laith Jawad1*, Juma Al-Mamry1 & Saeed Al-Shogebai2 1

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Perciformes: Ephippidae) in the Arabian Sea Coast of Oman Laith Jawad1*, Juma Al-Mamry1 & Saeed Al-Shogebai2 1 Ann. Mus. civ. St. nat. Ferrara Vol. 14/15 2011/12 pp. 99-102 ISSN 1127-4476 Confirmation of the presence of the African spadefish, Tripterodon orbis Playfair, 1867 (Perciformes: Ephippidae) in the Arabian Sea coast of Oman Laith Jawad1*, Juma Al-Mamry1 & Saeed Al-Shogebai2 1. Marine Science and Fisheries Centre, Ministry of Fisheries, P.O. box 427, Postal Code 100 Muscat, Sultanate of Oman 2. Ministry of Fisheries Wealth, Salalah Office, Oman * Corresponding author: [email protected] JAWAD L., AL-MA M RY J. & AL-SHOGEBAI S., 2012 - Conferma della presenza di Tripterodon orbis Playfair, 1867 (Perciformes: Ephippidae) lungo le coste dell’Oman del Mare Arabico. Ann. Mus. civ. St. nat. Ferrara, 14/15: 99-102. JAWAD L., AL-MA M RY J. & AL-SHOGEBAI S., 2012 - Confirmation of the presence of the Afri- can spadefish, Tripterodon orbis Playfair, 1867 (Perciformes: Ephippidae) in the Arabian Sea coast of Oman. Ann. Mus. civ. St. nat. Ferrara, 14/15: 99-102. The Arabian Gulf, the Sea of Oman and ABDE ss A L AA M , 1995). the Arabian Sea, all biologically productive The family Ephippidae as currently rec- seas, are bordering the coasts of The Sul- ognized incorporates eight genera and 15 tanate of Oman (RANDA ll , 1995). BOU L ENGER species (ES CH M EYER , 2012). The Platax is (1887) is considered the first to study the the largest genera of this family while the ichthyofauna of Oman when he reported on genus Tripterodon is monotypic (ES CH M EYER , the A. S. G. Jayakar collection of 172 spe- 2012). cies from the vicinity of Muscat City. Among T. orbis has been collected from vari- these were 14 new species. Another six new ous locations in the Indian Ocean, includ- species were described in 1889 when Bou- ing Zanzibar and the whole coast of East lenger studied the second A. S. G. Jayakar Africa (PL AYFAIR & GÜNTHER , 1867, DOR , collection. Several significant works have 1984); South Africa (SM ITH , 1986; HEE ms TRA been published on the Omani fish fauna & HEE ms TRA , 2004); Red Sea (GOREN & DOR , from the late 19th to the end of the first quar- 1994); several localities in the Arabian Sea, ter of the 20th Century (BOU L ENGER , 1892, but not from the Omani waters of the Ara- STEINDACHNER , 1902, REGAN , 1905). The fish bian sea (MANI L O & BOGOROD S KY , 2003); Tan- species obtained during the John Murray zania (SM ITH , 1986); Mozambique (FI S CHER Expedition were studied by Norman (1939) et al., 1990); Somalia (SO mm ER , 1996); and and documented them in the 1933-1934 India (KA P OOR , 2002). RANDA ll (1995) and Validivia and Investigator (RANDA ll , 1995). AL-ABDE ss A L AA M (1995) in their books on the During the second half of the 20th century, fish fauna of Oman did not record this spe- “The Common Sea Fishes of The Arabian cies in Omani waters. Gulf and Gulf of Oman” (WHITE & BARWANI , Recently AL-JUFAI L I et al (2010) has re- 1971) was the first book on the fish fauna ported this species from the Omani waters. of Oman. Later on, several more publica- SINCE AL-JUFAI L I et al. (2010) did not state tions made their appearance to report on a where in Oman they obtained this species number of species for the first time (RANDA ll , from then their finding is considered incom- 1986, 1994; HARE , 1990, DEBE L IU S , 1993, AL- plete record. In addition, AL-JUFAI L I et al. 99 Laith Jawad, Juma Al-Mamry & Saeed Al-Shogebai (2010) have not deposited voucher speci- adults; mouth small and terminal with thick mens anywhere. This practice rendered lips; usually large, movable, tricuspid teeth their record of T. orbis unreliable. arranged in several rows in both jaws; roof Ket Words: The present paper reports the of mouth smooth, lacking teeth; preopercu- first confirmed record of the African spade- lar flange and top of head without scales fish from the Arabian Sea coast of Oman; the record constitutes an additional record while opercle is completely covered with in the north Indian Ocean to the previously scales almost to its ventral edge; nine fee- known distributions of this species. ble, broad dorsal spines, 3rd and 4th spines In July 2011, a catch of African spade- elongated, and 19-21 soft dorsal rays; short, fish, T. orbis fish species was recorded at rounded pectoral fins; pelvic fins present; Salalah City on the Arabian Sea coasts of three spines and 15-17 soft rays in anal fin; Oman using deep gill net by local fisherman. body scales small, finely ciliated and extend- Morphometric and meristic details were re- ing to the soft parts of vertical fins. corded following MAUGÉ (1984); the data are Colour: body grey, silvery characterised presented in Table 1. The specimen is fixed with the presence of 8-10 indistinct darker in 10% formalin and later preserved in 70% crossbars, fading with age, the first pass ethanol for deposit in the fish collection of through eye; tail and dorsal fin are yellowish, the Marine Science and Fisheries Centre, while pelvic and anal fins are blackish. Ministry of Agriculture and Fisheries Wealth, The maximum size attained by this spe- Muscat, Sultanate of Oman. Catalogue num- cies is 750 mm (FI S CHER & BIANCHI , 1984, bers OMMSTC 1089. HEE ms TRA & HEE ms TRA , 2004) with common Tripterodon orbis Playfair, 1867 is char- total length reaching to 300 mm. The total acterized by deep, oblong body with para- length of the specimen obtained in this study bolic front profile; high, vertical forehead in is over the common size reported. Fig. 1 – Tripterodon orbis, OMMSFC 1089, 256 mm SL, caught at the coasts of the City of Salalah, sothern Oman, Arabian Sea, VII 2011, collected by fisherman using deep gill net. 100 Confirmation of the presence of the African spadefish, Tripterodon orbis Playfair, 1867 (Perciformes: Ephippidae) in the Arabian Sea coast of Oman Morphometric/ meristic characters Total length 341 Standard length (% in TL) 256 (75.1) Fork length (% in TL) 314 (92.1) Head length (% in SL) 78.2 (30.5) Head depth (% in SL) 145.1(56.7) Preorbital length (% in HL) 28.8 (36.8) Posorbital length (% in HL) 31.4(40.2) Predorsal fin length (% in SL) 14.3(18.3) Postdorsal fin length (% in SL) 19.3(7.5) Prepectoral fin length (% in SL) 79.0(30.9) Prepelvic fin length (% in SL) 71.6(28) Preanus length (% in SL) 137.1(53.6) Preanal fin length (% in SL) 162(63.2) Postanal fin length (% in SL) 244(95.3 Maximum body depth (% in SL) 18.5(7.2) Caudal peduncle depth (% in SL) 31.4(12.3) Pectoral fin length (% in SL) 45.7(17.9) Meristic characters Dorsal fin spines 9 Dorsal fin rays 19-21 Anal fin spines 3 Anal fin rays 15-17 Pectoral fin rays 17-19 Pored-lateral line scales 43-45 Table 1 – Morphometric and meristic characters of Tripterodon orbis collected from the Arabian Sea coasts of Oman (TL, total; HL, head length; SL standard length). Originally, T. orbis was described as a The range extension of the African spa- member of the family Sparidae by PL AYFAIR defish species reported here suggests that (1827). This species differs from the similar this species may have been overlooked by species, Ephippus orbis in having more ob- investigators on the Arabian Sea coasts of long body shape, large and tricuspid teeth, Oman, and that lack of sampling in the area large eye diameter about half of distance prevents its regular detection. from mouth to eye, scaleless top of head and 9-10 indistinct vertical bars, the first pass across eye; from drepanid species in having Bibliography short pectoral fins, non-protrusible mouth, and long 3rd and 4th dorsal fin spines; from AL-ABDE ss A L AA M T. Z. S., 1995 - Marine species of Sultanate of Oman. Marine Science and Fisher- the members of the family Scatophagidae in ies Centre, Ministry of Fisheries Wealth, Oman, having 3 anal spines and in having vertical 412 pp. head profile (FI S CHER & BIANCHI , 1984). AL-JUFAI L I S.M., HER M O S A G., SU L AI M AN S. AL-SHUAI L Y 101 Laith Jawad, Juma Al-Mamry & Saeed Al-Shogebai S.S. & AL MU J AINI , A.A., 2010 - Oman Fish Biodi- of southern Africa. NISC and SAIAB, i-xxiv + versity. Journal of King Abdul Aziz University of 1-488 pp. Marine Sciences, 21: 3-51. KA P OOR D., DAYA L R. & PONNIAH A.G., 2002 - Fish bio- BOU L ENGER G.A., 1887 - An account of the fishes ob- diversity of India. National Bureau of Fish Ge- tained by Surgeon-Major A.S.G Jayakar at Mus- netic Resources Lucknow, India, 775 pp. cat, east coast of Arabia. Proceedings of the MANI L O L.G. & BOGOROD S KY SV., 2003 - Taxonomic Zoological Society of London, 1889: 65-667. composition, diversity and distribution of coastal BOU L ENGER G.A., 1889 - Second account of the fish- fishes of the Arabian Sea. Journal of Ichthyol- es obtained by Surgeon-Major A.S.G. Jayakar at ogy, 43 (suppl. 1): 75-149. Muscat, east coast of Arabia. Proceedings of the MAUGÉ L.A., 1984 - Ephippidae. In W. Fischer and Zoological Society of London, 1889, 236-246. G. Bianchi (eds.), FAO species identification BOU L ENGER G.A., 1892 - The third account of the fish- sheets for fishery purposes.
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