My article Guppy Longevity (10 pages) answers the question of why fancy guppies don’t live that long. It puts much of the blame for guppy fragility onto the common practice of using only young fish as breeders. The long-term result is detrimental genetic changes. Since I started using only older fish as breeders, I’ve increased the longevity of my fish from ~6 months to over 12 months. Photo shows a 15-month old male and female. Still room for improvement, but this is progress.
How to breed nice guppies in just 8 planted tanks
My article Small Scale Guppy Breeding describes how I breed fancy guppies in just nine tanks. Articles covers the basics, but it contains new, vital information on guppy reproduction. Learn why I keep “chase” females with my juvenile males, why one female accepted and quickly mated with a new male but her full-sister rejected him… Learn the pros and cons of separating the sexes, how I breed for fitness… Overall, the article celebrates the guppy’s genetic trait of color polymorphism. Unlike breeding methods that emphasize strain uniformity, I work with the guppy’s natural tendency to produce different color patterns (Photo). This not only makes guppy breeding more fun but avoids inbreeding problems and genetic weaknesses.
Genetics of breeding fancy guppies for fitness, disease resistance, and beauty
Breeding Guppies: Genetic Pitfalls and Successes (10 page article) describes my experiences with crossing various guppy strains–Metalheads, Blue Grass, pet shop guppies, swordtail guppies, etc. Avoid the genetic problems I encountered as a beginning breeder. Follow the story, which includes basic genetic explanations, to a happy ending–the creation of novel and beautiful phenotypes. (Article revised March 2022)
Diana Walstad's Books and Articles 