Native Wild Types are guppies indigenous to the area that they were collected. The range of native wild types are restricted to the Carribean and North Eastern South America.
Feral Wild Types are guppies that were introduced by humans to a wild environment. This is the most common type of wild guppy. Guppies have been introduced to every continent, except Antarctica, for a variety of reasons, including mosquito control, escapes from fish farms, the dumping of pets and countless others. Goleta Darts are a feral wild type of guppy from Central California.
Both native and feral wild types owe their distinctive forms to natural selection both from the environment and sexual selection. In guppy society the flashiest male with the most unique markings wins the most girls. Unfortunately, being too flashy can turn the male into a meal for a predator. So, the problem for the males is to be good looking enough to turn a female's head, but not so colorful that he gets picked off by a crayfish or frog or whatever.
True Wild vs. Wild Descended Guppies
Daniel Proctor provides a discussion that distinguishes guppies that were caught in the wild with those that were descended from captured fish. He writes, ""True" wild guppies are fish taken directly from the wild. Only people with close connections to collectors have access to these fish, or people who live in a region that supports wild populations of guppies. These fish can much variability of characteristics, which will be idiosyncratic to their collection location (the population they come from)". Wild descended guppies, on the other hand, are those produced by a colony that has a direct line to the "True" wild population. In a sense, wild descended guppies are a captive sample that is kept reproductively isolated in order to maintain genetic purity. Wild descended guppies (whether native or feral) are the most commonly found types for sale on auction sites.
The Wild Guppy in the Aquarium
Whether the source of the fish is directlly taken from the wild or are sourced as descendents of guppies from the Black Lagoon, there are three contrasting techniques for keeping and reproducing guppies in the aquarium. Wild guppies can either be kept as curated, selectively bred and cultured strains. Each of these has their own strengths and weaknesses, depending upon the goals of the breeding program windows 7 home premium 64 bit iso.
The Curated Strain
This is the most commonly owned type of strain of either Wild or domesticated guppies. I dare say that most guppy enthusiasts started out as owners of curated strains. In this strategy a sample of fish are released into an aquarium and nature is allowed to take its course. It's survival of the fittests from the get go. Remember that female guppies are programed to favor the male with the most unique and flashy color patterning. Over time, the population becomes increasingly 'wild' looking and, unfortunately increasingly inbred. In a curated tank, the best male might very well be the same individual for multiple generations. The genetic load due to inbreeding can be nearly as high that of a selectively bred strain.
Selectively Bred Wild Strains
In this technique the it is the breeder rather than the female guppy who decides who is the best looking male in the tank. The goal of this technique is to produce a specific and highly regular phenotype of guppy. Often the goal is to either preserve an existing phenotype or to create a idealized wild type. In either case, single type strains of guppies exist only in aquariums and not in the wild. The natural genetic diversity of the wild population is sacrificed in the name of producing a specific type of individual most often by culling undesirable individuals and by line breeding.
Line breeding is the method used to create nearly every strain of fancy guppy. So, the same technique is used to create and maintain strains of Black Moscows are used to either create or maintain a type of wild guppy that was either never very common (guppies being guppies and all) or never actually existed in the wild. Derek Jordan offers advice to on how to keep and breed top quality guppies using line breeding techniques in his article "How to breed perfect guppies."
While this technique can and does produce spectacular fish, the populations are no longer representative of what you're going to find in the wild. Hallmarks of selectively bred wild strains are often that they were collected from multiple locations within a region and that they "breed true." The downside to line breeding is that at some point the specimine stops being a wild type. Also, inbreeding and genetic load can become an issue here as with the Curated Strain.