Ελασμοβράγχιοι (καρχαρίες και σαλάχια) (sharks and rays) >
Carcharhiniformes (Ground sharks) >
Proscylliidae (Finback catsharks)
Etymology: Eridacnis: Etymology not explained, possibly eri-, Greek intensive particle (i.e., very), and dakno (Gr.), bite, referring to “wide, angular” mouth of E. radcliffei (See ETYFish); radcliffei: In honor of ichthyologist-malacologist Lewis Radcliffe (1880-1950), scientific assistant of the U.S. Bureau ofFisheries and member of team that collected holytype from aboard the fisheries steamer Albatross (See ETYFish).
Eponymy: Lewis Radcliffe (1880–1950) was an American naturalist, particularly interested in malacology and ichthyology. [...] (Ref. 128868), visit book page.
More on author: Smith.
Environment: milieu / climate zone / depth range / distribution range
Οικολογία
Θαλασσινό(ά) βαθύβιο(ς); εύρος βάθους 71 - 766 m (Ref. 10004). Deep-water; 22°N - 10°S
Indo-West Pacific: widely distributed but with spotty records from Tanzania, the Gulf of Aden, India (Gulf of Mannar, Bay of Bengal), Andaman Islands, Viet Nam, and the Philippines. The immense range of this species is striking compared to the limited ranges of other members of the genus.
Length at first maturity / Μέγεθος / Βάρος / Age
Maturity: Lm 15.5, range 15 - 16 cm
Max length : 23.0 cm TL αρσενικό/απροσδιόριστο; (Ref. 244); 24.0 cm TL (female)
Ραχιαίες άκανθες (συνολικά) : 0; Εδρικές άκανθες: 0. Caudal fin without a rippled dorsal margin and ventral lobe but with a strong subterminal notch; vertebral axis of caudal fin little raised above body axis (Ref. 13566). Dark brown with blackish markings on dorsal fins (Ref. 13566).
Occurs over muddy bottoms, on the upper continental and insular slopes and outer shelves (Ref. 244). Feeds mainly on small bony fishes and crustaceans, with squid a lesser item in the diet (Ref. 244). One of the two smallest living sharks (Ref. 13566). Ovoviviparous (Ref. 50449), with 1 to 2 pups in a litter (Ref. 244).
Ovoviviparous, embryos feed solely on yolk (Ref. 50449). 1-2 pups per litter, size at birth about 11 cm (Ref. 244).
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)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Human uses
Εργαλεία
Special reports
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Διαδικτυακές πηγές
Estimates based on models
Preferred temperature (Ref.
123201): 9.3 - 18.6, mean 12.7 °C (based on 254 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.6328 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00288 (0.00112 - 0.00741), b=3.15 (2.92 - 3.38), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Τροφικό Επίπεδο (Ref.
69278): 4.1 ±0.3 se; based on diet studies.
Ελαστικότητα (Ref.
120179): Πολύ χαμηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού > 14 έτη (Fec=1).
Fishing Vulnerability (Ref.
59153): Low vulnerability (14 of 100).
Nutrients (Ref.
124155): Calcium = 14.4 [2.4, 98.2] mg/100g; Iron = 0.371 [0.078, 1.303] mg/100g; Protein = 18.1 [16.0, 20.2] %; Omega3 = 0.235 [0.091, 0.594] g/100g; Selenium = 8.99 [2.70, 29.75] μg/100g; VitaminA = 35.1 [6.9, 180.5] μg/100g; Zinc = 0.462 [0.219, 0.922] mg/100g (wet weight);
