Ελασμοβράγχιοι (καρχαρίες και σαλάχια) (sharks and rays) >
Carcharhiniformes (Ground sharks) >
Hemigaleidae (Weasel sharks)
Etymology: Hemipristis: hemi-, from hemisys (Gr.), half; pristis, from pristes (Gr.), sawyer (but here meaning saw), allusion not explained, possibly referring to how marginal serrations of teeth of H. serra (type species, a fossil) do not extend over the entire length of each tooth (See ETYFish); elongata: Latin for prolonged, referring to its long and slim body (See ETYFish).
More on author: Klunzinger.
Environment: milieu / climate zone / depth range / distribution range
Οικολογία
Θαλασσινό(ά) βενθικό(ς); εύρος βάθους 1 - 130 m (Ref. 6871). Tropical; 41°N - 34°S, 12°E - 156°E (Ref. 6871)
Indo-West Pacific: Red Sea and southeast Africa, including Persian Gulf (Ref. 68964) to Philippines, north to China, south to Australia.
Length at first maturity / Μέγεθος / Βάρος / Age
Maturity: Lm ?, range 120 - ? cm
Max length : 259 cm TL αρσενικό/απροσδιόριστο; (Ref. 130455); common length : 200 cm TL αρσενικό/απροσδιόριστο; (Ref. 13567); μεγ. δημοσιευμένο βάρος: 63.0 kg (Ref. 130455)
Ραχιαίες άκανθες (συνολικά) : 0; Εδρικές άκανθες: 0. A slender weasel shark with a long, broadly rounded snout, large curved, saw-edged teeth in the upper jaw, and hooked lower teeth protruding from mouth; gill slits long; fins strongly curved (Ref. 5578). Light grey or bronzy with no prominent markings (Ref. 5578).
A coastal species, found inshore and offshore on the continental and insular shelves (Ref. 244). Feeds on sharks, rays and bony fishes (Ref. 244); also cephalopods (Ref. 13567). Viviparous (Ref. 50449). Thought to be potentially dangerous because of its large, fearsome teeth and shallow-water habitat, but has not been recorded in an attack on people (Ref. 244). Caught regularly by inshore gillnet, bottom trawl (occasionally) and longline fisheries (Ref.58048). Regularly taken in artisanal fisheries (Ref. 13567). Utilized fresh for human consumption, liver processed for vitamins, fins used in the oriental shark fin trade, and by-products processed into fishmeal (Ref. 244). Most adults below 200 cm (Ref. 30573).
Viviparous, with 2 to 11 young in a litter (Ref. 6871) after a gestation period of 7-8 months; possibly reproduces in alternate years (Ref.58048). Size at birth about 45-52 cm TL (Ref. 13567, Ref.58048). Distinct pairing with embrace (Ref. 205).
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 Red List Status (Ref. 130435: Version 2024-2)
Threat to humans
Traumatogenic (Ref. 5213)
Human uses
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Διαδικτυακές πηγές
Estimates based on models
Preferred temperature (Ref.
123201): 23.8 - 29, mean 27.9 °C (based on 2110 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.0039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00355 (0.00144 - 0.00875), b=3.07 (2.85 - 3.29), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Τροφικό Επίπεδο (Ref.
69278): 4.3 ±0.3 se; based on diet studies.
Ελαστικότητα (Ref.
120179): Πολύ χαμηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού > 14 έτη (Fec=2).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (90 of 100).
Nutrients (Ref.
124155): Calcium = 19.4 [3.2, 106.9] mg/100g; Iron = 0.636 [0.166, 1.913] mg/100g; Protein = 19.3 [17.2, 21.4] %; Omega3 = 0.101 [0.042, 0.245] g/100g; Selenium = 64.4 [18.5, 200.7] μg/100g; VitaminA = 13.4 [4.4, 42.6] μg/100g; Zinc = 0.614 [0.292, 1.120] mg/100g (wet weight);
