Eumicrotremus ochotonensis, Okhotsk lumpsucker

Eumicrotremus ochotonensis Popov, 1928

Okhotsk lumpsucker
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Image of Eumicrotremus ochotonensis (Okhotsk lumpsucker)
No image available for this species;
drawing shows typical species in Cyclopteridae.

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> Perciformes/Cottoidei (Sculpins) > Cyclopteridae (Lumpfishes) > Eumicrotreminae
Etymology: Eumicrotremus: Greek, eu = good + Greek, mikros = little, small + Greek, trema = hole (Ref. 45335).

Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet Ökologie

seewasser demersal; tiefenbereich 110 - 282 m (Ref. 123372). Deep-water

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Northwest Pacific: Sea of Okhotsk.

Größe / Gewicht / Alter

Geschlechtsreife: Lm ?  range ? - ? cm
Max length : 9.9 cm TL Männchen/unbestimmt; (Ref. 123372)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt) : 8; Rückenflossenweichstrahlen (insgesamt) : 12 - 13; Afterflossenweichstrahlen: 11 - 12; Wirbelzahl: 28 - 31. This species is distinguished by the following characters: first dorsal fin, immersed in thick skin, is triangular (acute-angled in the posterior part), it retains its mobility (it can be pressed against the body); bony plaques on the head (individuals 4.0-8.5 cm SL) are small, arranged at intervals, form no more than five longitudinal rows in the interorbital region, while are more often single-row on the cheeks; anus area with only four large plaques; number of plaques on the body and head (circumpectoral, postbranchial, postorbital, median, supraorbital, and interorbital rows) 21-33 (average 26.7); distance from anus to the beginning of anal fin is 15-19% SL on average; pectoral fin long, on average, 53-66% HL. Colouration: when alive, head and upper side of body pigmented, with the dark, indistinct, somewhat elongated spots are located mainly near the bone plaques; belly and disk are light; chin dark; some specimens have scattered small spots on the belly, front of the anus in the form of dashes and in the form of very small dots behind it; caudal peduncle with a dark stripe; D2 rays with dark elongated small spots; caudal rays with vague spots; peritoneum light (Ref. 123372).
Body shape (shape guide): short and / or deep; Cross section: circular.

Biologie     Fachlexikon (Englisch) (z.B. epibenthic)

This species is more common on silty or sandy-stony bottom sediments at low temperatures (-1.2 to -1.3°C), which makes it possible to attribute it to the group of glacial-Okhotsk-Sea species. It does not occur in shallow waters with depths of less than 110 m, a habitat with a supercooled water mass with negative temperatures. Summer spawning is assumed with a 7.9 cm TL female with mature eggs (4-5 mm, 148 eggs) caught in July (adult females caught in May have immature eggs) (Ref. 123372).

Lebenszyklus und Paarungsverhalten Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven

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Chernova, N.V., O.S. Voskoboinikova, O.Yu. Kudryavtseva, S.Yu. Orlova, O.A. Maznikova and A.M. Orlov, 2019. Taxonomic status of the Okhotsk lumpsucker Eumicrotremus ochotonensis (Cyclopteridae, Cottoidei) with redescription of E. derjugini. J. Ichthyol. 59(3):289-306. (Ref. 123372)

IUCN Rote Liste Status (Ref. 130435: Version 2025-2 (Global))


CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

Fischereien: nicht kommerziell
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Schätzungen auf der Grundlage von Modellen

Phylogenetischer Diversitätsindex
(Ref. 82804)
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.02089 (0.00771 - 0.05664), b=3.03 (2.80 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophische Ebene
(Ref. 69278)
3.2   ±0.4 se; based on size and trophs of closest relatives
Widerstandsfähigkeit
(Ref. 120179)
hoch, Verdopplung der Population dauert weniger als 15 Monate. (Preliminary K or Fecundity.).
Anfälligkeit der Fischerei
(Ref. 59153)
Low vulnerability (12 of 100). 🛈