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Gambusia affinis  (Baird & Girard, 1853)

Mosquitofish
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Native range | All suitable habitat
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Gambusia affinis   AquaMaps   Data sources: GBIF OBIS
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Image of Gambusia affinis (Mosquitofish)
Gambusia affinis
Picture by Aland, G.


Australia country information

Common names: Mosquito-fish
Occurrence: introduced
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Considered a noxious species and its possession is prohibited (Ref. 2847).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/as.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Welcomme, R.L., 1988
National Database:

Classification / Names

Actinopterygii (ray-finned fishes) > Cyprinodontiformes (Rivulines, killifishes and live bearers) > Poeciliidae (Poeciliids) > Poeciliinae
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL

Common names from other countries

Main reference

Size / Weight / Age

Max length : 5.1 cm TL male/unsexed; (Ref. 50932); 7.0 cm TL (female); common length : 3.9 cm TL male/unsexed; (Ref. 12193); max. reported age: 3 years (Ref. 796)

Environment

Freshwater; brackish; benthopelagic; pH range: 6.0 - 8.0; dH range: 5 - 19; potamodromous

Climate / Range

Subtropical; 12°C - 29°C (Ref. 52055); 42°N - 26°N

Distribution

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.
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 0; Dorsal soft rays (total): 7-9; Anal spines: 0; Anal soft rays: 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.

Biology     Glossary (e.g. 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).

IUCN Red List Status (Ref. 115185)

Threat to humans

  Potential pest



Human uses

Fisheries: minor commercial; aquarium: commercial

More information

Age/Size
Growth
Length-weight
Length-length
Length-frequencies
Morphometrics
Morphology
Larvae
Larval dynamics
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References
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Internet sources

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805)
PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Trophic Level (Ref. 69278)
3.1   ±0.2 se; Based on diet studies.

Resilience (Ref. 69278)
Medium, minimum population doubling time 1.4 - 4.4 years (K=1.20; tmax=3; Fec=10-60)

Vulnerability (Ref. 59153)
Moderate vulnerability (38 of 100)
Price category (Ref. 80766)
Unknown