Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
; sötvatten; brackvatten bentopelagisk; pH range: 7.0 - 8.2; dH range: 10 - 40; ej vandrande (Ref. 126106). Tropical; 26°C - 28°C (Ref. 2060)
America: between Suriname and Brazil (not the Atlantic area South of the Laguna dos
Patos basin in Brazil); introduced to the Caribbean.
Storlek / Vikt / Ålder
Könsmognad: Lm ? range ? - ? cm
Max length : 7.8 cm TL hane/ej könsbestämd; (Ref. 111953); common length : 3.8 cm SL hane/ej könsbestämd; (Ref. 26728); publicerad maxvikt: 6.48 g (Ref. 111953)
Kort beskrivning
Bestämningsnycklar | Morfologi | Morfometri
Taggstrålar i ryggfenan (totalt) : 0; Mjukstrålar i ryggfenan (totalt) : 6 - 8; Taggstrålar i analfenan: 0; Mjukstrålar i analfenan: 7 - 9.
Body shape (shape guide): fusiform / normal.
Widespread in mildly brackish water in canals and drainage ditches at the edges of swamps, but rarely found in freshwater. Adults feed on mosquito larvae and has at times been used for control in ponds and reservoirs (Ref. 35237).
Livscykel och parningsbeteende
Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver
Males are very active and also approach the females of other Poecilinae. [Females produce 6 - 10 offspring which follow their mother for a few hours after birth, referring to Ref. 35237.] After 28 days gestation, female gives birth to 100 young or more. Sexual maturity is reached after 3-4 months (Ref. 2060).
Kenny, J.S., 1995. Views from the bridge: a memoir on the freshwater fishes of Trinidad. Julian S. Kenny, Maracas, St. Joseph, Trinidad and Tobago. 98 p. (Ref. 11225)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
Hot mot människor
Harmless
Mänskliga användningsområden
Fiskeri: saknar intresse
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Särskilda rapporter
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Uppskattningar baserade på modeller
Index för fylogenetisk mångfald (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01349 (0.00982 - 0.01853), b=3.18 (3.12 - 3.24), in cm total length, based on LWR estimates for this species (Ref.
93245).
Trofisk nivå (Ref.
69278): 2.3 ±0.1 se; based on diet studies.
Resiliens (Ref.
120179): Mellan, lägsta populationsfördubblingstid 1,4-4,4 år (Preliminary K or Fecundity.).
Sårbarhet i fisket (Ref.
59153): Low vulnerability (10 of 100).
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