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Trachichthyiformes (Roughies) >
Trachichthyidae (Slimeheads)
Etymology: Hoplostethus: Greek, hoplon = weapon + Greek, stetho, stethion = brest; literal = to prick a little breast (Ref. 45335); roseus: Name from Latin 'rose', referring to the rosy colouration dorsally on the body and on the dorsal, pectoral and caudal fins of fresh specimens..
Environment: milieu / climate zone / depth range / distribution range
Ecologie
marien bathydemersaal; diepte 200 - 400 m (Ref. 129008). Subtropical
Verspreiding
Landen | FAO regio's | Ecosystemen | Voorkomen | Point map | Introducties | Faunafri
Western Pacific: Japan, Taiwan and New Caledonia.
Grootte / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 21.4 cm SL mannelijk / geslacht onbekend; (Ref. 129008); 24.7 cm SL (female)
Korte beschrijving
Morfologie | Morfometrie
Dorsale stekels (totaal): 6 - 7; Dorsale zachte stralen (totaal): 12-13; Anale stekels 3; Anale zachte stralen: 9 - 10; Wervels: 26. This species is distinguished from its congeners by the following set of characters: pyloric caeca 65-84; predorsal scales 18-22; pectoral-fin rays 14-17 (modally 15-16); total gill rakers on first-gill arch 18-19; HF1 2.2%-3.7% SL; HF2 5.1%- 6.0% SL; postorbital width 17.1%-20.6% SL. Colouration: oral cavity, branchial cavity, top and underside of tongue, and peritoneum are uniformly black; base of caudal fin brownish; spinous dorsal-fin membrane with black distal margin. (Ref. 129008).
The mature female specimen (24.7 cm SL) with well-developed eggs and the male specimen (21.4 cm SL) with well-developed testes; females (19.5-20.9 cm SL) with mature eggs, suggests that this species is a small species, which reproduces at a length c. 20.0 cm SL (Ref. 129008).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
Su, Y., H.-C. Lin and H.-C. Ho, 2022. Hoplostethus roseus, a new roughy fish from the western Pacific based on morphology and DNA barcoding (family Trachichthyidae). J. Fish Biol. 101(3):441-452.
[First published online, pp. 1-12, 4 July 2022. Volume, issue and pages added 15 Sept. 2022.] (Ref. 129008)
Status op de Rode Lijst van het IUCN (Ref. 130435)
Gevaar voor de mens
Harmless
Gebruik door de mens
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Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01660 (0.00723 - 0.03808), b=3.05 (2.85 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.6 ±0.6 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
120179): Zeer laag, minimale populatieverdubbelingstijd meer dan 14 jaar (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (20 of 100).
