Koya, 2000


No detailed citation.

Associated characteristics

Species Development state Trait Primary Data Secondary Data
Gambusia affinis Spawning conditions Spawning temperature Mosquitofish need more than 18°C temperature and 12.5 h daylength for their reproduction, and that brood interval is kept almost constant if the water temperature and photoperiod are constant. 18.0 °C
Gambusia affinis Female Maximum GSI value 20-22%, every 22 days during the reproductive season 21.0 percent
Gambusia affinis Egg Incubation time The ovarian events between two successive parturitions were summarized as follows: active vitellogenesis (days 0-3), maturation and fertilization (days 3-5), progress of embryonic developmentand beginning of vitellogenesis for the following gestation (day 10), and pre-parturition and progress of vitellogenesis (day 20). 1.5 days
Gambusia affinis Egg Degree-days for incubation 100-120 [Seems to 5-6 days at 25°C] 110.0 °C * day
Gambusia affinis Egg Temperature for incubation 25°C 25.0 °C
Gambusia affinis Egg Egg size after water-hardening Fertilised eggs began to appear in 1.8-1.9 mm follicles (2.4%) adn Increased to 16.0% in 1.90-2.0 mm follicles [The fertilized eggs were sligtly larger in diameter than mature oocytes] 1.85 mm
Gambusia affinis Egg Oocyte diameter Mature oocytes were seen in follicles greater than 1.6 mm in diameter, and the number increased as the diameter became larger 1.6 mm