Swine estrous cycle The estrous cycle in the pig averages 21 days but can range from 17 to 25 days. The first day of standing heat, when the female is receptive to the male and will stand to be mounted, is referred to as day 0.
A: Goldfish mate by spawning. The female releases her eggs into the water, and the male releases his sperm to fertilize the eggs. Goldfish reach sexual maturity at approximately 1 year of age. The mating ritual of goldfish involves the male chasing the female and nudging against her to prompt her to release her eggs.
Rating Newest Oldest. Best Answer: Koi eggs take 3-5 days depending on water temperature. The warmer the water the faster they will hatch. Goldfish eggs hatch in 3-4 days depending on water temperature again the warmer water the faster they hatch.ating Newest Oldest. Best Answer: Koi eggs take 3-5 days depending on water temperature. The warmer the water the faster they will hatch. Goldfish eggs hatch in 3-4 days depending on water temperature again the warmer water the faster they hatch.