Australia country information

Common names: Blacktip shark, School shark, Sorrah shark
Occurrence: native
Salinity: brackish
Abundance: abundant (always seen in some numbers) | Ref: Last, P.R. and J.D. Stevens, 1994
Importance: minor commercial | Ref:
Aquaculture: | Ref:
Regulations: restricted | Ref: Kailola, P.J., M.J. Williams, P.C. Stewart, R.E. Reichelt, A. McNee and C. Grieve, 1993
Uses: live export: yes;
Comments: Occurs in northern Australia, from Point Quobba in Western Australia to Gladstone in Queensland (Ref. 6871). Also found in the Arafura Sea (Ref. 9819). Based on tagging and electrophoretic studies, there is only one stock of spot-tail sharks in Australian waters (Ref. 26278). Commercial fishery: Since the early 1970s, spot-tail sharks together with other shark species have been fished off in northern Australia. The Taiwanese gillnetters have been in huge operations until mid-1986 when limitations on gillnet length were introduced. Due to uneconomic yields, the Taiwanese gillnet fishery ceased operations within the Australian Fishing Zone. At about the same time, an Australian gillnet and a drifting longline fishery was in operations in Napier Broome Bay and eastern Gulf of Carpentaria. This is a relatively small fishery with a catch of about 500 t and is marketed in south-eastern Australia as 'flake'. Recreational fishery: Game fishers mostly from off Queensland usually catch small sharks of up to 2 m and 60 kg weight. Berley trail, heavy handlines with wire, and rod-and-reel are used for catching larger species. Other methods include trolling using lures and fish baits. Resource status: Stocks were overexploited based on the assessments of the Taiwanese catch and effort data in 1986 (Ref. 26279). From 1980-84, sustainable catch for the offshore shark fishery would have been about 2400 t live weight (Ref. 26274). Since 1986, sustainable catch estimates have improved when fishing effort had declined. The inshore northern region is probably only lightly exploited. No estimate is available on the impact of the catches by the demersal otter trawl fisheries on this resource. The Taiwanese and Indonesian gillnetting vessels continue to operate outside the Australian Fishing Zone to the north. Off the east coast of Queensland, the status of the whaler shark populations is not known. Also Ref. 2334, 7300, 9997, 33390.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/as.html
National Fisheries Authority: http://www.csiro.au/
Occurrences: Occurrences Point map
Main Ref: Kailola, P.J., M.J. Williams, P.C. Stewart, R.E. Reichelt, A. McNee and C. Grieve, 1993
National Database:

Common names from other countries

Spottail shark, Requin à queue tachetée, Tiburón rabo manchado, ... more

Klassifizierung / Names Namen | Synonyme | Catalog of Fishes(Gattung, Arten) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (Haie und Rochen) (sharks and rays) > Carcharhiniformes (Ground sharks) > Carcharhinidae (Requiem sharks)
Etymology: Carcharhinus: karcharos (Gr.), sharp or jagged; rhinus, an ancient name for sharks, from rhine (Gr.), rasp, both words alluding to a shark's jagged, rasp-like skin. (See ETYFish); sorrah: Tamil (Indian subcontinent) word for shark [authorship often attributed to Müller & Henle, who published Valenciennes’ description]. (See ETYFish).

Environment: milieu / climate zone / depth range / distribution range Ökologie

seewasser; brackwasser riff-verbunden; tiefenbereich 0 - 140 m (Ref. 30573), usually 1 - 73 m (Ref. 90102). Tropical; 31°N - 31°S

Verbreitung Länder | FAO Gebiete | Ecosystems | Vorkommen | Point map | Einführungen | Faunafri

Indo-West Pacific: Persian Gulf (Ref. 68964), Red Sea and East Africa (including Madagascar, Mauritius and Seychelles) to the Philippines, north to China, south to Australia. Also from Vanikolo Island (Santa Cruz Islands) and the Solomon Islands. Possibly occurring in the Gulf of Aden, Gulf of Oman and Sri Lanka (Ref. 9997).

Length at first maturity / Size / Gewicht / Alter

Maturity: L_m 130.0 range ? - ? cm
Max length : 160 cm TL Männchen/unbestimmt; (Ref. 2334); max. veröff. Gewicht: 28.0 kg (Ref. 6390); max. veröff. Alter: 8 Jahre (Ref. 6390)

Kurzbeschreibung Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt): 0; Rückenflossenweichstrahlen (insgesamt): 0; Afterflossenstacheln 0; Afterflossenweichstrahlen: 0. A small, spindle-shaped shark with a long, rounded snout, large circular eyes, and oblique-cusped serrated teeth; 2nd dorsal fin very low; interdorsal ridge present (Ref. 5578). 2nd dorsal, pectorals and lower caudal lobe with dark tips; 1st dorsal with thin but conspicuous dark tip; pelvic fins and upper caudal lobe plain (Ref. 5485). Grey or grey-brown above, white below with a golden-brown sheen on the area between eyes and gill slits (in fresh specimens); pectorals, second dorsal, and lower caudal fin lobe with conspicuous black tips, first dorsal and upper caudal fin lobe with black edging (Ref. 9997). A dark band on flank extending rearwards to pelvic fins (Ref. 9997).

Found on the continental and insular shelves, primarily near reefs (Ref. 244). Sometimes in offshore waters (Ref. 30573). Live near the seabed during the day and near the surface at night (Ref. 6390). Feeds on bony fishes (Ref. 68964). Shark movements often short (50 km) but may be more than 1,000 km (Ref. 6390). Prefers teleost fishes but also feeds on cephalopods and crustaceans (Ref. 6871). Viviparous (Ref. 50449). Regularly caught by local artisanal and small-scale commercial fisheries where it occurs (Ref. 244). Utilized as a food fish; fins used in the oriental shark fin trade, liver for vitamin oil, and offal for fishmeal (Ref. 9997).

Life cycle and mating behavior Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fecundity | Larven

Viviparous, with a yolk-sac placenta (Ref. 244). Pups, average 3, range 1-8, are produced in January after a 10-month gestation period. Average length at birth is 50 cm TL. Length increases by about 25 cm during the first year. These sharks breed once each year (Ref. 13440). Distinct pairing with embrace (Ref. 205).

Hauptreferenz Upload your references | Referenzen | Koordinator : Compagno, Leonard J.V. | Partner

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. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)

IUCN Rote Liste Status (Ref. 130435)

Gefährdung zunehmend (NT) (A2d); Date assessed: 29 October 2020

CITES (Ref. 128078)

Appendix II: International trade monitored

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

Harmless (Ref. 2334)

Nutzung durch Menschen

Fischereien: weniger kommerziell

FAO(Fischereien: production; publication : search) | FishSource | Sea Around Us

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Estimates based on models

Preferred temperature (Ref. 115969): 24.5 - 29, mean 27.8 (based on 2844 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00331 (0.00184 - 0.00595), b=3.15 (3.00 - 3.30), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).

Trophic level (Ref. 69278): 4.2 ±0.5 se; based on diet studies.

Widerstandsfähigkeit (Ref. 120179): niedrig, Verdopplung der Population dauert 4,5 - 14 Jahre. (K=0.34; tm=2-3; tmax=8; Fec=3).

Prior r = 0.28, 95% CL = 0.16 - 0.49, Based on 1 stock assessment.

Fishing Vulnerability (Ref. 59153): Moderate to high vulnerability (50 of 100).

Climate Vulnerability (Ref. 125649): Very high vulnerability (90 of 100).

Preiskategorie (Ref. 80766): High.

Carcharhinus sorrah (Valenciennes, 1839)