Elasmobranchii (haaien en roggen) (sharks and rays) >
Squaliformes (Sleeper and dogfish sharks) >
Etmopteridae (Lantern sharks)
Etymology: Etmopterus: Greek, ethmos, -ou = sieve or ethmoides bone + Greek, pteron = wing, fin (Ref. 45335); joungi: Named for Dr. Shoou-Jeng Joung, National Taiwan Ocean University.
Eponymy: Dr Shoou-Jeng Joung (d: 1958) is an ichthyologist at the National Taiwan Ocean University, Keelung, where he is an Associate Professor and Chairman, Department of Environmental Biology and Fisheries Science. [...] (Ref. 128868), visit book page.
Environment: milieu / Klimaatzone / Diepte / distribution range
Ecologie
marien pelagic-oceanic; diepte 300 - ? m (Ref. 86885). Deep-water
Northwest Pacific: Taiwan.
Lengte bij maturiteit / Grootte / Gewicht / Leeftijd
Maturiteit: Lm 36.3, range 32 - 40.6 cm
Max length : 40.6 cm TL mannelijk / geslacht onbekend; (Ref. 86885); 45.6 cm TL (female)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
This species is distinguished by the following characters: short preoral snout 8.0% TL (8.2-8.7); broad and strongly arched mouth; upper teeth differ from lower teeth with each tooth in first functional row with single median cusp and flanked by one or two lateral cusplets on either side; lower teeth in single series, forming blade-like edge with slender, non-erect cusps; relatively short head, 15.9% TL (15.3-16.0); dermal denticles truncate, low, with block-like crowns, irregularly arranged over majority of body, extending onto dorsal fins; pectoral to pelvic fin space large, 29.0% TL (25.3-27.30); very narrow pectoral fins, posterior portion square-shaped, posterior margin acutely angular at anterior and inner margins, with no expanded corners of fins; second dorsal fin located relatively posteriorly along body, second dorsal fin spine long and strongly recurved, 0.5 (0.3-0.5) into dorsal fin height; interdorsal space about three times distance between first dorsal fin spine origin and pectoral fins; inconspicuous suprapelvic flank marking lacking posterior branch; dorsal caudal fin margin short, 15.4% TL (15.3-19.4); posterior end of lateral line becoming open groove, with the ventral edge darkly colored; caudal fin short; monospondylous vertebrae 48 (38-41), diplospondylous vertebrae 17 (21-24), dorso-caudal vertebrae 24 (22-25), and total vertebrae 89 (84-88); spiral valve with 11 turns; color in life dusky grey dorsally, black to dark grey ventrally (Ref. 86885).
Body shape (shape guide): elongated.
Occurs along the upper continental slope and caught by bottom trawl at a depth greater than 300m. Sexual maturity in males likely achieved between 31.9 and 40.6 cm TL, and in females, larger than 45.6 cm TL. A cymothiod isopod Elthusa raynaudi was found attached to the roof of the mouth of the holotype (normally occurs in the gill chambers of fishes) (Ref. 86885).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Knuckey, J.D.S., D.A. Ebert and G.H. Burgess, 2011. Etmopterus joungi n. sp., a new species of lanternshark (Squaliformes: Etmopteridae) from Taiwan. aqua, Int. J. Ichthyol. 17(2): 61-72. (Ref. 86885)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2024-2)
Gevaar voor de mens
Harmless
Gebruik door de mens
Visserij: van geen belang
Tools
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Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00380 (0.00194 - 0.00745), b=3.09 (2.92 - 3.26), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 4.2 ±0.5 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (36 of 100).
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