sub class Elasmobranchii (ฉลามและกระเบน) (sharks and rays) >
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.
Environment: milieu / climate zone / depth range / distribution range
นิเวศวิทยา
เกี่ยวกับทะเล,น้ำเค็ม สัตว์ผิวน้ำในเขตน้ำลึก; ระดับความลึก 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.
Length at first maturity / ขนาด / น้ำหนัก / Age
Maturity: Lm 22.5, range 22 - 23 cm
Max length : 30.5 cm TL เพศผู้/กระเทย; (Ref. 96339)
เงี่ยงครีบหลัง (รวม) : 0; เงี่ยงครีบก้น: 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).
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)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
การประมง: ไม่มีผลประโยชน์
เครื่องมือ
Special reports
Download XML
แหล่งที่มาจากอินเตอร์เน็ต
Estimates based on models
Preferred temperature (Ref.
123201): 5.7 - 15.3, mean 9.2 °C (based on 870 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.0020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00372 (0.00141 - 0.00976), b=3.12 (2.89 - 3.35), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
ระดับชั้นอาหาร (Ref.
69278): 4.1 ±0.4 se; based on diet studies.
ความสามารถในการกลับคืนสู่ปกติ (Ref.
120179): ต่ำมาก, เวลาต่ำสุดที่จะทำให้ประชากรเพิ่มขึ้นเป็น 2 เท่าใช้เวลามากกว่า 14 ปี (Fec=8).
Fishing Vulnerability (Ref.
59153): Low vulnerability (21 of 100).
