Ελασμοβράγχιοι (καρχαρίες και σαλάχια) (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
Οικολογία
Θαλασσινό(ά) βενθοπελαγικό; εύρος βάθους 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 / Μέγεθος / Βάρος / Age
Maturity: Lm ?, range 59 - ? cm
Max length : 84.0 cm TL αρσενικό/απροσδιόριστο; (Ref. 6871)
Ραχιαίες άκανθες (συνολικά) : 2; Εδρικές άκανθες: 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
Γεννητική Ωρίμανση | Αναπαραγωγή | Γεννοβολία | Αβγά | Γονιμότητα | Προνύμφες
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: Version 2024-1)
Threat to humans
Harmless
Human uses
αλιεία: περιορισμένης εμπορικότητας
Εργαλεία
Special reports
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Διαδικτυακές πηγές
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=0.00380 (0.00164 - 0.00880), 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 (Ref.
69278): 4.0 ±0.60 se; based on food items.
Ελαστικότητα (Ref.
120179): Χαμηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού 4,5 - 14 έτη (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);
