Herring scad


Herring scad
Herring scad
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Suborder: Percoidei
Superfamily: Percoidea
Family: Carangidae
Genus: Alepes
Species: A. vari
Binomial name
Alepes vari
(Cuvier, 1833)
Approximate range of the herring scad
Synonyms
  • Caranx vari,
    Cuvier, 1833
  • Selar macrurus,
    Bleeker, 1851
  • Caranx macrurus,
    (Bleeker, 1851)
  • Alepes macrurus,
    (Bleeker, 1851)
  • Alepes glabra,
    Fowler, 1904

The herring scad, Alepes vari (also known as the duskyfin crevalle and trevally scad), is a common species of tropical marine fish in the jack family Carangidae. The species inhabits the surface waters of coastal regions throughout the Indo-West Pacific region, feeding on a variety of crustaceans and small fishes. It is the largest fish of the scad genus Alepes, growing to a recorded length of 56 cm. The herring scad is identified among the genus Alepes by its more numerous and smaller scutes and the number of gill rakers on the first arch. It is of minor importance to fisheries throughout its range.

Contents

Taxonomy and naming

The herring scad is one of five extant species in the scad genus Alepes, a group of fish in the jack family, Carangidae. The Carangidae are perciform fish in the suborder Percoidei.[1]

The species was first scientifically described by the French naturalist Georges Cuvier in 1833 from a specimen now lost to science.[2] He named the species Caranx vari, believing the fish was closely affiliated with the large jacks of that genus. The species was later transferred to the scad genus Alepes by Gushiken in 1983, and a specimen from Pondicherry, India was designated to be the lectotype the following year by Smith-Vaniz.[3] The species was redescribed and renamed twice after Cuvier's description, first by Pieter Bleeker as Selar macrurus and then by Henry Fowler as Alepes glabra, both of which are junior synonyms discarded under ICZN rules. Although commonly called the 'herring scad', the names duskyfin crevalle, trevally scad and, incorrectly, blackfin scad (A. melanoptera) are applied to the species.[4]

Description

The herring scad has a body profile very similar to other members of the genus Alepes, having a strongly compressed, ovate body. The ventral and dorsal profiles of the fish are almost evenly convex, joined anteriorally by a pointed snout. There are two separate dorsal fins, the first containing 8 spines while the second has a single spine followed by 24 to 27 soft rays. The anal fin consists of two anteriorally detached small spines followed by a single spine connected to 20 to 23 soft rays.[5] The lateral line is strongly arched anteriorally with the junction of the curved and straight sections located the origin of second dorsal to the third soft ray. The curved section contains 42 to 50 scales and 0 to 2 scutes, while the straight section has 0 to 7 scales and 48 to 69 scutes.[6] There is a well-developed adipose eyelid on the posterior half of the eye. The jaws hold a single row of numerous comb like teeth. There are 32 to 38 gill rakers and a total of 24 vertebrae. The herring scad is by far the largest species in Alepes, growing to 56 cm in total length, although is more commonly encountered at below 30 cm.[7]

The species is an ash blue above, fading to a silvery white below, with a diffuse dusky blotch on margin of operculum. The fins are dusky with the exception of the spinous dorsal fin which is pale to dark dusky. The amount of dark pigment in the fins is sexually dimorphic, with males developing darker spinous dorsal fin, lobes of soft dorsal and anal fins, and pelvic fins than females.[7]

Distribution and habitat

The herring scad is distributed throughout tropical to subtropical regions of the Indo-West Pacific oceans. The species has been recorded from the Red Sea, eastward to Sri Lanka, India, Southeast Asia, China, Indonesia, the Philippines, New Guinea, and as far north as Taiwan[3] and as far south as northern Australia.[8] The herring scad is most commonly found in shallow coastal regions where it inhabits the surface layers of the ocean over a variety of substrates.[7]

Biology and fishery

The herring scad is a carnivorous species, known to consume a variety of crustaceans including shrimps, copepods and decapods as well as other small fishes. It is one of a number of pelagic fish from the Red Sea found to have high numbers of luminescent bacteria in its gut, living symbiotically with the fish as part of the gut flora.[9] The species is of little importance to fisheries, taken occasionally on hook and line gear.[7]

References

  1. ^ "Alepes vari". Integrated Taxonomic Information System. http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=641974. Retrieved 2 January 2008. 
  2. ^ Hosese, D.F.; Bray, D.J., Paxton, J.R. and Alen, G.R. (2007). Zoological Catalogue of Australia Vol. 35 (2) Fishes. Sydney: CSIRO. pp. 1150. ISBN 978-0-643-09334-8. 
  3. ^ a b Lin, Pai-Lei; Shao, Kwang-Tsao (2 April 1999). "A Review of the Carangid Fishes (Family Carangidae) From Taiwan with Descriptions of Four New Records". Zoological Studies 38 (1): 33–68. http://cat.inist.fr/?aModele=afficheN&cpsidt=10055944. 
  4. ^ Zipcode Zoo. "Alepes vari". BayScience Foundation, Inc. http://zipcodezoo.com/Animals/A/Alepes_vari.asp. Retrieved 2008-01-28. [dead link]
  5. ^ Randall, John E. (1995). Coastal Fishes of Oman. Honolulu: University of Hawaii Press. pp. 183. ISBN 0824818083. 
  6. ^ Gunn, John S. (1990). "A revision of selected genera of the family Carangidae (Pisces) from Australian waters". Records of the Australian Museum Supplement 12: 1–78. doi:10.3853/j.0812-7387.12.1990.92. 
  7. ^ a b c d Carpenter, Kent E.; Volker H. Niem (eds.) (2001) (PDF). FAO species identification guide for fishery purposes. The living marine resources of the Western Central Pacific. Volume 5. Bony fishes part 3 (Menidae to Pomacentridae). Rome: FAO. pp. 2684. ISBN 92-5-104587-9. ftp://ftp.fao.org/docrep/fao/009/y4160e/y4160e00.pdf. 
  8. ^ Froese, Rainer, and Daniel Pauly, eds. (2008). "Alepes vari" in FishBase. January 2008 version.
  9. ^ Makemson, John C.; Gregorio V. Hermosa Jr (1999). "Luminous bacteria cultured from fish guts in the Gulf of Oman". Luminescence (John Wiley & Sons, Ltd.) 14 (3): 161–168. doi:10.1002/(SICI)1522-7243(199905/06)14:3<161::AID-BIO538>3.0.CO;2-A. PMID 10423577. http://www3.interscience.wiley.com/cgi-bin/abstract/62500642/ABSTRACT. Retrieved 2008-01-29. 

External links


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • herring scad — silkinis alepis statusas T sritis zoologija | vardynas taksono rangas rūšis atitikmenys: lot. Alepes vari angl. herring scad rus. сельдевый алеп ryšiai: platesnis terminas – alepiai …   Žuvų pavadinimų žodynas

  • Scad — Scad, n. [Gael. & Ir. sgadan a herring.] (Zo[ o]l.) (a) A small carangoid fish ({Trachurus saurus}) abundant on the European coast, and less common on the American. The name is applied also to several allied species. (b) The goggler; called also… …   The Collaborative International Dictionary of English

  • herring trevally — auksinis alepis statusas T sritis zoologija | vardynas taksono rangas rūšis atitikmenys: lot. Alepes kalla angl. deep bodied crevalle; golden scad; herring trevally rus. калла ryšiai: platesnis terminas – alepiai …   Žuvų pavadinimų žodynas

  • big-eyed scad — Scad Scad, n. [Gael. & Ir. sgadan a herring.] (Zo[ o]l.) (a) A small carangoid fish ({Trachurus saurus}) abundant on the European coast, and less common on the American. The name is applied also to several allied species. (b) The goggler; called… …   The Collaborative International Dictionary of English

  • golden scad — auksinis alepis statusas T sritis zoologija | vardynas taksono rangas rūšis atitikmenys: lot. Alepes kalla angl. deep bodied crevalle; golden scad; herring trevally rus. калла ryšiai: platesnis terminas – alepiai …   Žuvų pavadinimų žodynas

  • List of fishes of India — This is a list of the fish species found in India and is based on FishBase. [Froese, R. and D. Pauly. Editors. 2006.FishBase. World Wide Web electronic publication. [http://www.fishbase.org] , version (05/2006)] AlbuliformesAlbulidae… …   Wikipedia

  • Carangidae — Taxobox name = Jacks, pompanos, horse mackerels and scads image width = 240px image caption = Malabar trevally, Carangoides malabaricus regnum = Animalia phylum = Chordata classis = Actinopterygii ordo = Perciformes familia = Carangidae… …   Wikipedia

  • Fish of the Red Sea — Deepwater species= See the List of deep water fish of the Red SeaDemersal species*Ambassidae ** Ambassis gymnocephalus , Bald glassy ** Ambassis urotaenia , Banded tail glassy perchlet*Apistidae ** Apistus carinatus , Ocellated… …   Wikipedia

  • Alepes — Taxobox name = Alepes fossil range = fossilrange|23|0 Miocene to Present [cite journal | last = Sepkoski | first = Jack | title = A compendium of fossil marine animal genera | journal = Bulletins of American Paleontology | volume = 364 | pages =… …   Wikipedia

  • Alepes vari — silkinis alepis statusas T sritis zoologija | vardynas taksono rangas rūšis atitikmenys: lot. Alepes vari angl. herring scad rus. сельдевый алеп ryšiai: platesnis terminas – alepiai …   Žuvų pavadinimų žodynas