Reproduction of Gambusia affinis
Document source: http://fishbase.net.br/Reproduction/FishReproSummary.php?GenusName=Gambusia&ID=3215&SpeciesName=affinis&StockCode=3411&fc=216
 
Main Ref. Seale, A., 1917
Mode dioecism
Fertilization internal (oviduct)
Mating type monogamy:
Spawning frequency No obvious seasonal peak
Spawning aggregation Ref.  
Batch spawner Ref.  
Reproductive guild bearers
internal live bearers
Parental Care maternal
Description of life cycle and mating behavior 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).
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