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Gambusia affinis (Baird & Girard, 1853)

Mosquitofish
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Gambusia affinis
Male picture by Aland, G.

Klassifizierung / Names Namen | Synonyme | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (Strahlenflosser) > Cyprinodontiformes (Rivulines, killifishes and live bearers) > Poeciliidae (Poeciliids) > Poeciliinae
Etymology: Gambusia: Gambusia: From the Cuban term, Gambusino, which means "nothing", usually in the context of a joke or a farce. Fishing for gambusinos = when one catches nothing (Ref. 45335);  affinis: From the Latin word affinusmeaning related (Ref. 79012).  More on authors: Baird & Girard.

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

; süßwasser; brackwasser benthopelagisch; pH range: 6.0 - 8.0; dH range: 5 - 19; potamodrom.   Subtropical; 12°C - 29°C (Ref. 52055); 42°N - 26°N

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

North and Central America: Mississippi River basin from central Indiana and Illinois in USA south to Gulf of Mexico and Gulf Slope drainages west to Mexico. One of the species with the widest range of introductions which acquired for itself a near pan-global distribution (Ref. 1739). Several countries report adverse ecological impact after introduction.

Size / Gewicht / Alter

Maturity: Lm ?  range ? - ? cm
Max length : 5.1 cm TL Männchen/unbestimmt; (Ref. 50932); 7.0 cm TL (female); common length : 3.9 cm TL Männchen/unbestimmt; (Ref. 12193); max. veröff. Alter: 3 Jahre (Ref. 796)

Kurzbeschreibung Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt): 0; Rückenflossenweichstrahlen (insgesamt): 7-9; Afterflossenstacheln 0; Afterflossenweichstrahlen: 9 - 10. Origin of dorsal fin opposite 7th anal ray. Length of anal base much less than half distance from caudal. 8 horizontal scale rows between back and abdomen. Ventrals terminate immediately before anal fin. Pelvic fins reach ventrals.

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

Most abundant in lower reaches of streams (Ref. 44091). Adults inhabit standing to slow-flowing water; most common in vegetated ponds and lakes, backwaters and quiet pools of streams. Found frequently in brackish water (Ref. 5258). Pelagic and surface predatory fish (Ref. 94816). Feed on zooplankton, small insects and detritus (Ref. 5258, 10294). Used as live food for carnivorous aquarium fishes. Viviparous (Ref. 5258, 30578). Effective in mosquito control and widely introduced, but found to compete with indigenous fish and to upset the ecological balance (Ref. 6351).

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

The species is viviparous (Ref. 5258). Internal fertilization is possible because the anal fin of the male is modified into a copulatory organ. The females carries about 30 alevins and gestation lasts for a period of 24 days (Ref. 6348) to a month (Ref. 30578).

Hauptreferenz Upload your references | Referenzen | Koordinator | Partner

Page, L.M. and B.M. Burr, 1991. A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. (Ref. 5723)

IUCN Rote Liste Status (Ref. 120744)

  nicht bedroht (LC) ; Date assessed: 03 February 2012

CITES (Ref. 118484)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Potential pest





Nutzung durch Menschen

Fischereien: weniger kommerziell; Aquarium: Kommerziell
FAO(Publication : search) | FishSource |

Mehr Information

Alter/Größe
Wachstum
Länge-Gewicht
Länge-Länge
Längenhäufigkeiten
Morphometrie
Morphologie
Larven
Larven Pop.Dyn.
Rekrutierung
Dichte
Referenzen
Aquakultur
Aquakultur Profil
Zuchtlinien
Genetik
Allel-Häufigkeiten
Vererbbarkeit
Krankheiten
Verarbeitung
Mass conversion
Partner
Bilder
Stamps, Coins Misc.
Laute
Ciguatera
Geschwindigkeit
Schwimmstil
Kiemenoberfläche
Otoliths
Gehirngröße
Sehfähigkeit

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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00794 (0.00636 - 0.00991), b=3.11 (3.05 - 3.17), in cm Total Length, based on LWR estimates for this species (Ref. 93245).
Trophic Level (Ref. 69278):  3.1   ±0.2 se; Based on diet studies.
Generation time: 1.4 ( na - na) years. Estimated as median LN(3)/K based on 2 growth studies.
Widerstandsfähigkeit (Ref. 120179):  mittel, Verdopplung der Population dauert 1,4 - 4,4 Jahre. (K=1.20; tmax=3; Fec=10-60).
Verwundbarkeit (Ref. 59153):  Moderate vulnerability (38 of 100) .
Preiskategorie (Ref. 80766):   Unknown.