sub class Elasmobranchii (ฉลามและกระเบน) (sharks and rays) >
Squaliformes (Sleeper and dogfish sharks) >
Somniosidae (Sleeper sharks)
Etymology: Zameus: zame, Japanese for shark (at the time, Z. squamulosus was known only from Japan). (See ETYFish); squamulosus: Latin for covered or beset with small scales, “so minute as to give a velvety appearance to the skin”. (See ETYFish).
More on author: Günther.
Environment: milieu / climate zone / depth range / distribution range
นิเวศวิทยา
เกี่ยวกับทะเล,น้ำเค็ม กลุ่มสัตว์หน้าดิน,กลุ่มสัตว์พื้นท้องน้ำ; ระดับความลึก 0 - 2200 m (Ref. 6871), usually 400 - 900 m (Ref. 55584). Deep-water; 68°N - 56°S, 180°W - 180°E
Atlantic, Indian and Pacific tropical oceans.
Length at first maturity / ขนาด / น้ำหนัก / Age
Maturity: Lm ?, range 59 - ? cm
Max length : 84.0 cm TL เพศผู้/กระเทย; (Ref. 6871)
เงี่ยงครีบหลัง (รวม) : 2; เงี่ยงครีบก้น: 0. Black in color, small dorsal fin spines, moderately long snout, small lanceolate teeth without cusplets in upper jaw and large high, knife-cusped cutting teeth in lower jaw, mouth moderately wide and nearly transverse, caudal fin with strong subterminal notch and short lower lobe (Ref. 247).
Demersal or pelagic near continental slopes and seamounts in depths of 550-2,000 m (Ref. 6871, 58302). Also found from the surface to 580 m over deep water (Ref. 26346). Ovoviviparous (Ref. 205). Used dried and salted for human consumption and for fishmeal (Ref. 6871). Caught rarely by longline fisheries operating in deepwater; also caught, but rarely landed, by pelagic tuna longline fisheries (Ref.58048).
Life cycle and mating behavior
Maturities | การสืบพันธุ์ | Spawnings | Egg(s) | Fecundities | ตัวอ่อน
Distinct pairing with embrace (Ref. 205). Presumambly viviparous, with yolk-sac dependancy (Ref.58048).
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
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Estimates based on models
Preferred temperature (Ref.
123201): 4.1 - 12.6, mean 7.7 °C (based on 948 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00168 - 0.00901), b=3.13 (2.94 - 3.32), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
ระดับชั้นอาหาร (Ref.
69278): 4.0 ±0.60 se; based on food items.
ความสามารถในการกลับคืนสู่ปกติ (Ref.
120179): ต่ำ, เวลาต่ำสุดที่จะทำให้ประชากรเพิ่มขึ้นเป็น 2 เท่าใช้เวลา 4.5 - 14 ปี (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Moderate to high vulnerability (54 of 100).
Nutrients (Ref.
124155): Calcium = 5.01 [0.96, 26.10] mg/100g; Iron = 0.208 [0.047, 0.710] mg/100g; Protein = 18.7 [16.3, 21.1] %; Omega3 = 0.3 [0.1, 1.0] g/100g; Selenium = 20.2 [5.1, 67.9] μg/100g; VitaminA = 15.5 [2.9, 85.2] μg/100g; Zinc = 0.398 [0.181, 0.835] mg/100g (wet weight);
