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.
Read on to find out how best to measure your goldfish tank temperature, the right temperatures for breeding goldfish, non-breeding aquarium temperatures, and the importance of air supply in warm water.he correct temperature for goldfish really depends upon whether you intend to breed your fish. If you intend to breed your goldfish then, rather than maintaining a steady temperature all year round, you should try to replicate the temperature changes that occur in nature.