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Yongeichthys thomasi (Boulenger, 1916)

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drawing shows typical species in Gobiidae.

Klassifizierung / Names Namen | Synonyme | Catalog of Fishes(Gattung, Arten) | ITIS | CoL | WoRMS | Cloffa

> Gobiiformes (Gobies) > Gobiidae (Gobies) > Gobiinae
Etymology: More on author: Boulenger.

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

seewasser; süßwasser; brackwasser demersal; amphidrom (Ref. 46888). Tropical; ? - 25°C (Ref. 13614)

Verbreitung Länder | FAO Gebiete | Ecosystems | Vorkommen | Point map | Einführungen | Faunafri

Africa: Senegal to Democratic Republic of the Congo (Ref. 7390, 57403, 79590, 80060).

Size / Gewicht / Alter

Maturity: Lm ?  range ? - ? cm
Max length : 12.8 cm TL Männchen/unbestimmt; (Ref. 130826)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt) : 7; Rückenflossenweichstrahlen (insgesamt) : 8 - 9; Afterflossenstacheln: 1; Afterflossenweichstrahlen: 7 - 9. Diagnosis: mouth broad, lower jaw slightly prominent; outer row of caniniform teeth in lower jaw distinctly larger than inner rows; lateral teeth of this outer row particularly enlarged and backward-pointing; interorbital space narrow; small, cycloid, predorsal scales extending anteriorly beyond level of preoperculum, towards rear edge of orbit, with anterior margin of scaled area convex in dorsal view; 11-16 predorsal scales; small scales at bases of pectoral fins and slightly reduced scales at base of caudal fin; flanks covered with large, weakly ctenoid scales; 23-27 scales in longitudinal series (including about 2 scales on caudal fin base), 7-9 in rearward transverse series; 1st dorsal fin: VI, sometimes with spines prolonged; 2nd dorsal fin: I,8 (rarely 9); anal fin: I,7-9; pectoral fins: 15-17 rays; caudal fin rounded or subacuminate, with 17-18 segmented rays; tips of pelvic fins not reaching to anus (Ref. 57403, 79590). Coloration: Preserved specimens, as well as live individuals, can be identified by their characteristic pigmentation patterns; head with a black ‘chinstrap’ band slightly narrower than eye, running behind jaw, ventrally from lower margin of eye to isthmus on ventral part of head; blackish spot on upper part of pectoral-fin base, and another on flanks immediately dorsal to this; 3 black lines running anteriorly along head, each starting at pectoral spot: one band runs anteriorly along dorsal margin of operculum and preoperculum towards eye, where it extends anteroventrally along lower margin of eye until it meets black chinstrap band; 2nd band runs anteroventrally on operculum towards preoperculum or rear of suborbital region; 3rd band runs ventrally over operculum towards branchiostegal rays; body brownish, paler on belly; several irregular bars on back, sometimes extending onto flanks; faint band along midline, emphasized into about 5 regularly spaced spots on midline; dorsal and caudal fins dusky; distinct black spot at base of caudal fin; pelvic and pectoral fins dark; ventral region of pectoral-fin base with oval black spots, sometimes confluent and forming a crescentric band along lower fin margin; anal fin dark, especially near distal margin (Ref. 57403, 79590).

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

Endemic to brackish waters (Ref. 92840). Usually found in brackish waters of creeks close to river mouths, coastal lagoons (Ref. 4343, 7390, 57403, 79590), mangrove swamps (Ref. 7390, 57403, 79590), ponds and creeks (Ref. 4343). Rare reports of the species ascending rivers to freshwater, which it may tolerate for short periods (Ref. 57403, 79590). Maximum reported standard length 47 mm (=60 mm TL)(Ref. 79590).

Life cycle and mating behavior Maturities | Fortpflanzung | Spawnings | Egg(s) | Fecundities | Larven

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Harrison, I.J., P.J. Miller and F. Pezold, 2003. Gobiidae. p. 625-666 In C. Lévêque, D. Paugy and G.G. Teugels (eds.) Faune des poissons d'eaux douce et saumâtres de l'Afrique de l'Ouest, Tome 2. Coll. Faune et Flore tropicales 40. Musée Royal de l'Afrique Centrale, Tervuren, Belgique, Museum National d'Histoire Naturalle, Paris, France and Institut de Recherche pour le Développement, Paris, France. 815 p. (Ref. 57403)

IUCN Rote Liste Status (Ref. 130435)

  nicht bedroht (LC) ; Date assessed: 20 October 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

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AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | FishWatcher Einträge suchen | CISTI | Catalog of Fishes: Gattung, Arten | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: Genom, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Tree of Life | Wikipedia: Gehe zu, Suchen | World Records Freshwater Fishing | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.6250   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00912 (0.00295 - 0.02818), b=2.98 (2.72 - 3.24), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.4   ±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.).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).