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Rouleina euryops Sazonov, 1999

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Native range | All suitable habitat | Point map | Year 2100
This map was computer-generated and has not yet been reviewed.
Rouleina euryops   AquaMaps   Data sources: GBIF OBIS
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drawing shows typical species in Alepocephalidae.

Classificatie / Names Lokale namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | ITIS | CoL | WoRMS | Cloffa

> Alepocephaliformes (Slickheads and tubeshoulders.) > Alepocephalidae (Slickheads)
Etymology: euryops: From the big eyes of the species..

Environment: milieu / climate zone / depth range / distribution range Ecologie

marien bathypelagisch; diepte 622 - 1412 m (Ref. 36330). Deep-water

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Western Central Pacific: Sulu Sea.

Grootte / Gewicht / Leeftijd

Maturity: Lm ?  range ? - ? cm
Max length : 23.4 cm SL mannelijk / geslacht onbekend; (Ref. 36330)

Korte beschrijving Morfologie | Morfometrie

Dorsale zachte stralen (totaal): 17-21; Anale zachte stralen: 14 - 18. Body shallow, maximum depth reaching 20%SL. Caudal peduncle relatively long (usually >18%SL). Vertical fin bases against each other. Head not very deep, moderately wide (postorbital width 11-12.5%SL). Snout very short but not blunt; its length 1.5-2.3 times smaller than orbit diameter; olfactory bulbs relatively large; ethymoid in olfactory bulb region relatively narrow. Eyes very large; orbit > 30% HL; no aggregations of light connective tissue in the orbit area around the eyeball; interorbital gap very narrow and < half the orbit diameter. Lacrimal not deep, significantly smaller than lens diameter, slightly overlapping maxillare. Seismosensory canals on head not extended, their pores not enlarged. No separate suprapreoperculum at the upper end of the praeoperculum; preopercular canal connects to the postorbital canal by means of a skin tube. Upper edge of upper jaw overlaps with the vertical of the rear edge of the lens, it may reach the vertical of the back edge of the orbit in large specimens. Supramaxilla 2; front one relatively long; its length equal or shorter than upper outgrowth of the posterior one. Photophores present on the head: a row of 4-5 infraorbitalias; 1 behind back edge of the orbit at its middle level; 5 on both sides along the lower jaw seismosensory canals; 2-4 along the upper 3 rays of the gill membrane; 1 each on the operculum, interoperculum, and between orbit and olfactory capsule. Photophores on body, situated above and below the lateral line, the size increases in the vertical direction that the largest ones cover the lower profile of the body; in front of the vertical fins; 3 rows in the caudal region; several irregular rows of small ones on the gill membranes. Pyloric caeca < 10 (Ref. 36330).

Biologie     Verklarende woordenlijst (bv. epibenthic)

Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven

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Sazonov, Y.I., 1999. A new species of the genus Rouleina (Argentiniformes, Alepocephalidae) from the Philippine Archipelago Seas and a redescription of R. livida and R. nuda. J. Ichthyol. 39(7):479-487. (Ref. 36330)

Status op de Rode Lijst van het IUCN (Ref. 125652)

  Niet bedreigd (LC) ; Date assessed: 01 March 2017

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





Gebruik door de mens

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Estimates based on models

Preferred temperature (Ref. 123201): 5.4 - 10.1, mean 6.1 °C (based on 113 cells).
Fylogenetische diversiteitsindex (Ref. 82804):  PD50 = 0.5010   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00339 (0.00162 - 0.00710), b=3.19 (3.00 - 3.38), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trofisch niveau (Ref. 69278):  3.5   ±0.5 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref. 120179):  Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (19 of 100).