Guppy
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PREFACE Too successfully breed a strain of guppies’ long-term one must first set attainable goals. After aesthetic value, manipulating a small snapshot of genetics, consisting of fixed strains, has always been my primary interest in... more
Animal breeding hobbyists have been useful to science because they identify and isolate color coat mutations that geneticists can in turn use in their studies of the development and differentiation of color cells. This paper discusses a... more
PREFACE The intent of this article is to point out how considerations beyond color, pattern and caudal shape play an important role in creating healthy & viable strains. As such specific references to color study are not made. They... more
The guppy has the major classes of chromatophores found in teleosts: xantho-erythrophores, iridophores and melanophores. These color cells render the adult body essentially opaque. A transparent guppy was developed, the See-thru guppy,... more
Abstract. The source of genetic inputs in modern Domestic Guppy strains has long been a controversial topic in breeder circles. Assumed by many to consist solely of Poecilia reticulata, and considered by others to have multiple inputs... more
Introduction: When a new strain of guppies or a variation upon one makes an appearance it can seem natural to credit its existence on newly discovered genetics. Occasionally this is the case. More often than not after careful test... more
Understanding and working with the primary trait found in IFGA Gold Class Domestic Guppies; Metal Gold (Mg).
Design and use of an Asian style breeding rack system. For use with single point filtration or limited to automated water change.
Although fish have been kept for more than three centuries as ornamentals, and the development of manufactured feed since 50 years ago has contributed to the tremendous growth of this hobby, nutrition of ornamental fish is based on... more
Introduction: It seems most new strains come about from one of four scenarios: 1. Random hybridization. 2. Mutation. 3. Crossover. 4. Planned modification. The latter should stem from a predetermined breed plan with well set goals... more
History of my Blond Lowersword breeding program over the last 35 years. To include discussion of the primary genes and traits encompassed within the numerous resultant phenotypes produced to date.
How to identify and successfully incorporate Asian Blau (Ab) into your strains to produce additional phenotypes, yet maintain as a single combined strain.
Genetic linkage maps of the guppy (Poecilia reticulata) were constructed from independent crosses between the Tuxedo strain and a feral line (Wildtype). Segregation patterns of random amplified polymorphic DNA (RAPD) markers and... more
In the year 1937 A. E. Robson of High Gate, London, England introduced to United Kingdom (UK) members of the Guppy Breeder's Society (GBS) a new strain which would become known among Domestic Guppy breeders as the "Robson Guppy". A... more
In response to both of these theories, I state each as being only partially correct. I propose: That Metal Gold (Mg), Stoerzbach (s), Snakeskin Body (Ssb) all in homozygous state, and a “missing trait” are required to produce the... more
...alot of the misconceptions in Guppy Genetics by hobbyists are based on observations derived from the wrong starting point.
At some point in time many serious Domestic Guppy breeders are faced with a similar situation presented in the title of this article. No, I'm not talking about the two often asked questions leading to tank creep; "do I have too many... more
Genetic variability within and among feral populations and cultured strains of the guppy (Poecilia reticulata) was investigated by random amplification of polymorphic DNA (RAPD) fingerprinting. Feral guppies were collected from 6 isolated... more
Studying the mechanisms by which immature males learn courtship behaviour is essential to our understanding of the evolution of different mating strategies, yet generally this has been neglected. Here I demonstrate an effect of early... more
Likely one of the least appreciated guppy phenotypes to be found is Homozygous Asian Blau (Ab). Such fish are normally considered weak by-products of popular delta breedings involving blue iridophores and red color pigment; Blue Topaz,... more
Nestled high in the Jemez Mountains of Sandoval County, New Mexico, at an elevation of around 7350’ (2240.28 meters) reside one of the most unique and oldest established feral populations of Poecilia reticulata in North America. This... more
In some mating systems males should benefit from mating with virgin females because of their higher reproductive value. We determined experimentally whether and how males distinguish between virgin and recently mated females in the guppy,... more
This is one of those topics that generates very little documentation in the hobbyist world. In the scientific community it is just the opposite and a number of comprehensive studies have resulted in excellent publications. What is not... more
When it comes to collecting feral populations of Poecilia reticulata in North America, West Virginia is not one of the first places that come to mind. While many Guppy enthusiasts are aware of Florida feral ditch populations derived... more