Eviota irrasa, Unpolished dwarfgoby

Eviota irrasa Karnella & Lachner, 1981

Unpolished dwarfgoby
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Eviota irrasa   AquaMaps   Data sources: GBIF OBIS
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Eviota irrasa
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Klassifizierung / Names Namen | Synonyme | Catalog of Fishes(Gattung, Arten) | ITIS | CoL | WoRMS | Cloffa

> Gobiiformes (Gobies) > Gobiidae (Gobies) > Gobiinae
Etymology: Eviota: No etymology given, suggested by Christopher Scharpt: from Latin 'eu' for 'true' and 'iota' for anything very small, in combination 'truly very small' referring to it as being the smallest vertebrate at the time it has benn described by Jenkins (thus, making the suggestion by Scharpt plausible.;  irrasa: From the Latin irrasa meaning unpolished or unshaved, in reference to the indiscrete nature of the pigmentation pattern of the head and trunk (Ref. 5289).  More on authors: Karnella & Lachner.

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

; seewasser demersal; tiefenbereich 0 - 3 m (Ref. 58018).   Tropical

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Western Pacific: Cuyo Islands, Palawan, Philippines and the Southwest Islands of Palau.

Size / Gewicht / Alter

Maturity: Lm ?  range ? - ? cm
Max length : 1.8 cm TL Männchen/unbestimmt; (Ref. 5289)

Kurzbeschreibung Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt): 7; Rückenflossenweichstrahlen (insgesamt): 9; Afterflossenstacheln 1; Afterflossenweichstrahlen: 8; Wirbelzahl: 26. Characterized by the following: base of pectoral fin with two dark circular to oval spots, not sharply defined and often weakly connected, the upper spot somewhat larger than the lower; pectoral spots moderately pigmented, the intensity about equal to trunk bars; head (dorsally) and nape with dark, transverse, bars continuous over dorsal midline, and somewhat more heavily pigmented laterally; trunk with regular, dark, vertical bars, somewhat diffuse in outline, continuous over dorsal midline and usually not extending below midside anteriorly and much shorter posteriorly on peduncle; scale pockets dorsolaterally on trunk often weakly pigmented (Ref. 5289); characterized further by longitudinal scale series 24; ctenoid scales, absence on head, nape and base of pectoral fin; separated pelvic fins, only thin membrane joins bases; 8-11 branches on fourth pelvic ray; depth of body 4.1-4.7 in SL (Ref. 90102). Dorsal to anal fin-ray formula 9/8 (Ref. 116739).

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

Life cycle and mating behavior Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fecundity | Larven

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Karnella, S.J. and E.A. Lachner, 1981. Three new species of the Eviota epiphanes group having vertical trunk bars (Pisces: Gobiidae). Proc. Biol. Soc. Wash. 94(1):264-275. (Ref. 5289)

IUCN Rote Liste Status (Ref. 123251)

  nicht bedroht (LC) ; Date assessed: 29 June 2018

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

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Estimates based on models

Preferred temperature (Ref. 115969): 25.1 - 29.3, mean 28.5 °C (based on 1584 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00575 (0.00261 - 0.01268), b=3.09 (2.91 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.0   ±0.3 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.).
Verwundbarkeit (Ref. 59153):  Low vulnerability (10 of 100) .