Theory predicts that sexual selection can promote the evolution of reproductive isolation and speciation. Those cases in which sexual selection has led to speciation should be characterized by significant differentiation in male display traits and correlated female preferences in the absence of post-zygotic isolation, accompanied by little genetic or other morphological differentiation. Previou...

The reproductive response on the fecundity of ornamental fish guppy (Poecilia reticulata) indicates that the 0.01% concentration of natrum muriaticum 30 c potency is more significant than other concentrations. It was suggested that 0.01% concentration enhance the fecundity and increase the production of guppy.

The fitness of male guppies (Poecilia reticulata) highly depends on the size and number of their black, blue, and orange ornaments. Recently, progress has been made regarding the genetic mechanisms underlying male guppy pigment pattern formation, but we still know little about the pigment cell organization within these ornaments. Here, we investigate the pigment cell distribution within the bla...

Uviovo and Beatty1) reported that zinc decreased brood size and body size of young at birth, but had no effect on the intervals between broods in the guppy. Boyd2) reported that a threshold concentration of organochloric insecticides such as DDT, dieldrin, toxaphen and lindane caused the pregnant females of the mosquitofish to abort. However, little attention has been paid to the stage of pregn...

People use conjunctions and disjunctions of concepts in ways that violate the rules of classical logic, such as the law of compositionality. Specifically, they overextend conjunctions of concepts, a phenomenon referred to as the Guppy Effect. We build on previous efforts to develop a quantum model [1, 2, 3], that explains the Guppy Effect in terms of interference. Using a well-studied data set ...

background: the presence of pesticides is very prevalent in surface waters of iran. these toxic substances may accumulate in the food chain and cause serious ecological and health problems. the aim of this study was to determine the acute toxicity of glyphosate, deltamethrin and pretilachlor as potential dangerous organic pesticides to assess lethal effects of these chemicals agents to the gupp...

Tujuan dari penelitian ini adalah untuk mengujii dan membandingkan pengaruh perbedaan suhu terhadap tingkat produktivitas induk ikan Guppy. Penelitian merupakan eksperimental, dengan menggunakan Rancangan Acak Lengkap (RAL). Ikan Guppy yang digunakan memiliki berat rata-rata 1,1 g. dipelihara selama 40 hari empat perlakuan tiga ulangan yaitu S0 (26 0C), S1 (28 S2 (30 0C) S3 (32 0C). Hasil menun...

Ten microsatellites were isolated from a genomic DNA library generated from guppy (Poecilia reticulata; Poecilidae) enriched for CA-repeats. All of the 10 microsatellites were polymorphic in guppy with an average allele number of 4.9/locus ranging from 2 to 14. All 10-primer pairs amplified specific products in green swordtail (Xiphophorus helleri) and 9 of the 10 microsatellites displayed poly...

What are guppies? Guppies (Poecilia reticulata) are small tropical fish, native to the coastal streams of northeast South America. They owe their name to Robert John Lechmere Guppy who introduced them into the aquarium trade. Guppies have since become very popular aquarium fish, known for colorful males and live-bearing females. But guppies are also one of the premier model systems for the stud...