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Squaliformes (Sleeper and dogfish sharks) >
Dalatiidae (Sleeper sharks)
Etymology: Euprotomicrus: eu-, a Greek intensive (i.e., very); protos (Gr.), first; mikros (Gr.), small, referring to very small first dorsal fin (See ETYFish); bispinatus: bi-, from bis (L.), two; spinatus (L.) thorny, referring to spiny processes on each pelvic fin (claspers) of the male (See ETYFish).
More on authors: Quoy & Gaimard.
Περιβάλλον: περιβάλλον / κλιματική ζώνη / εύρος βάθους / εύρος διανομής
Οικολογία
Θαλασσινό(ά) βαθυπελαγικό(ς); εύρος βάθους 0 - 1800 m (Ref. 31367). Deep-water; 38°N - 54°S
Circumglobal: In subtropical to temperate waters. Southeast Atlantic: near Ascension Island, east of Fernando de Noronha Island, and west of Cape of Good Hope, South Africa. Indian Ocean: Madagascar to Western Australia. North Pacific: Midway Islands, Hawaiian Islands to off California, USA. South Pacific: between New Zealand, Phoenix Island and southern Chile.
Μήκος κατά την πρώτη ωρίμανση / Μέγεθος / Βάρος / Ηλικία
Γεννητική Ωρίμανση: Lm 22.5, range 22 - 23 cm
Max length : 30.5 cm TL αρσενικό/απροσδιόριστο; (Ref. 96339)
Ραχιαίες άκανθες (συνολικά) : 0; Εδρικές άκανθες: 0. Small dogfish with a cigar-shaped body, a distinct dark collar marking around the gill region, a conical snout, large round eyes (Ref. 5578), fleshy lips, enlarged triangular lower teeth, equal-sized gill slits (Ref. 5578), very small dorsal fins, and a paddle-shaped caudal fin with nearly symmetrical upper and lower lobes (Ref. 6871). Black with white fin edges; belly luminous (Ref. 247).
Body shape (shape guide): elongated.
Epi-, meso-, and perhaps bathypelagic at 1->400 m (Ref. 58302). Occurs at or near the surface at night, descending to below 400 m (possibly as deep as 1,800 m) during the day (Ref. 31367). Feeds on squid, bony fishes, and crustaceans (Ref. 5578). Ovoviviparous (Ref. 205), with 8 young per litter, size at birth between 6 and 10 cm (Ref. 247). Caught with dip-nets and buckets at night (Ref. 6577).
Ovoviviparous, with 8 young per litter. Size at birth between 6 and 10 cm (Ref. 247). 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 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref. 247)
Κατάσταση Κόκκινου Καταλόγου IUCN (Ref. 130435: Version 2025-2 (Global))
Απειλή για τον άνθρωπο
Harmless
Ανθρώπινες χρήσεις
αλιεία: χωρίς ενδιαφέρον
Εργαλεία
Ειδικές εκθέσεις
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Διαδικτυακές πηγές
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Δείκτης φυλογενετικής ποικιλότητας (Αναφ. 82804) |
PD50 = 1.0010 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00309 (0.00143 - 0.00666), b=3.14 (2.95 - 3.33), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Τροφικό Επίπεδο (Αναφ. 69278) |
4.1 ±0.4 se; based on diet studies. |
Ελαστικότητα (Αναφ. 120179) |
Πολύ χαμηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού > 14 έτη (Fec=8). |
Ευπάθεια στην αλιεία (Ref. 59153) |
Low vulnerability (24 of 100). 🛈 |