Ελασμοβράγχιοι (καρχαρίες και σαλάχια) (sharks and rays) >
Carcharhiniformes (Ground sharks) >
Hemigaleidae (Weasel sharks)
Etymology: Hemigaleus: hemi-, from hemisys (Gr.), half, referring to similarity to and/or close affinity with Galeus (now in Pentanchidae) (See ETYFish); microstoma: micro-, from mikros (Gr.), small; stoma (Gr.), mouth, referring to very short arched mouth compared with Chaenogaleus macrostoma, its presumed congener at the time (See ETYFish).
More on author: Bleeker.
Taxonomic Remarks
Specimens from Australia (and probably Papua New Guinea) are placed in Hemigaleus australiensis White, Last & Compagno, 2005 (Ref. 56150).
Περιβάλλον: περιβάλλον / κλιματική ζώνη / εύρος βάθους / εύρος διανομής
Οικολογία
Θαλασσινό(ά) βενθικό(ς). Tropical; 22°C - 28°C (Ref. 244); 28°N - 30°S
Indo-West Pacific: southern India and Sri Lanka; China to Indonesia (Ref. 56150). Also from Red Sea (Ref. 93009).
Specimens found in Australia (and probably Papua New Guinea) belong to a separate species, Hemigaleus australiensis (Ref. 56150).
Μήκος κατά την πρώτη ωρίμανση / Μέγεθος / Βάρος / Ηλικία
Γεννητική Ωρίμανση: Lm ?, range 78 - ? cm
Max length : 135 cm TL αρσενικό/απροσδιόριστο; (Ref. 130455); μεγ. δημοσιευμένο βάρος: 14.0 kg (Ref. 130455)
Ραχιαίες άκανθες (συνολικά) : 0; Εδρικές άκανθες: 0. Australian specimens with dark-tipped fins; tooth counts 28-34/43-54; total vertebral counts 111 to 118 (Ref. 13567). Indonesian, Singapore and Thailand specimens with light-tipped fins; tooth counts 25-32/37-43; total vertebral counts 137 to 150 (Ref. 13567). Grey-brown above, lighter below, dorsal fins with white tips and posterior margins, sometimes with spots on sides of body (Ref. 13567).
Body shape (shape guide): elongated.
A small, relatively common inshore and offshore shark of tropical continental seas (Ref. 13567). Feeds mainly on cephalopods, particularly octopi (Ref. 13567) but also takes crustaceans and cephalopods (Ref. 244). Viviparous (Ref. 50449). Taken regularly in inshore artisanal fisheries (Ref.244), commonly caught by inshore gillnet, bottom trawl and, to a lesser extent, longline fisheries. Utilized for human consumption (Ref. 244). Offal used for fishmeal (Ref. 244).
Viviparous, with a yolk-sac placenta; 4 to 14 fetuses in a litter (Ref. 13567); 2-4 pups after a gestation period of about 6 months; born at about 45-47 cm TL (Ref. 58048). Size of full-term fetuses (detached umbilical cords and placentae) ranges from 23.7 to 25.6 cm (Ref. 244). 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)
Κατάσταση Κόκκινου Καταλόγου IUCN (Ref. 130435: Version 2025-2 (Global))
Ανθρώπινες χρήσεις
αλιεία: περιορισμένης εμπορικότητας
Εργαλεία
Ειδικές εκθέσεις
Λήψη XML
Διαδικτυακές πηγές
Εκτιμήσεις βάσει μοντέλων
Προτιμώμενη θερμοκρασία (Αναφ.
123201): 22.2 - 28.3, mean 27 °C (based on 816 cells).
Δείκτης φυλογενετικής ποικιλότητας (Αναφ.
82804): PD
50 = 0.7539 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00214 (0.00107 - 0.00426), b=3.10 (2.92 - 3.28), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Τροφικό Επίπεδο (Αναφ.
69278): 4.2 ±0.4 se; based on diet studies.
Ελαστικότητα (Αναφ.
120179): Πολύ χαμηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού > 14 έτη (Fec=4).
Ευπάθεια στην αλιεία (Ref.
59153): Very high vulnerability (81 of 100).
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Θρεπτικά συστατικά (Ref.
124155): Calcium = 27.9 [4.5, 154.3] mg/100g; Iron = 0.693 [0.182, 2.119] mg/100g; Protein = 19 [17, 21] %; Omega3 = 0.114 [0.048, 0.271] g/100g; Selenium = 54.1 [16.0, 167.0] μg/100g; VitaminA = 22.3 [7.2, 70.4] μg/100g; Zinc = 0.769 [0.374, 1.395] mg/100g (wet weight);