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A peacock spreading his tail, displaying his plumagePeahen. Peafowlis a common name for two bird species of the genus Pavoand one species of the closely related genus Afropavowithin the tribe Pavoniniof the family Phasianidae(the pheasants and their allies). Male peafowl are referred to as peacocks, and female peafowl are referred to as peahens.
Fisherian runaway or runaway selection is a sexual selection mechanism proposed by the mathematical biologist Ronald Fisher in the early 20th century, to account for the evolution of ostentatious male ornamentation by persistent, directional female choice. [ 1][ 2][ 3] An example is the colourful and elaborate peacock plumage compared to the ...
The peacock plumage is a classic example of the hypothesized Fisherian runaway. In the preface, Fisher considers some general points, including that there must be an understanding of natural selection distinct from that of evolution, and that the then-recent advances in the field of genetics (see history of genetics) now allowed this.
The peacock bass and largemouth bass are excellent examples. The two fishes are not related, yet are very similar. Peacock bass are native of South America and is a Cichla. While largemouth bass are native to Southern USA states and is a sunfish. [117] others will surely be described (but see the results based on DNA data [118]).
Note the eyes and lips remain the normal colour. Studies have shown that the reduced pigment comes from a mutation in the gene for tyrosinase, the same as causes Type I oculocutaneous albinism in humans. [1] This white horse owes its coloring to a dominant allele (dominant white). A leucistic rock dove. Both the eyes and legs are still of the ...
Much-loved wild bird slowly recovering from injuries
The plumage of the peacock increases its vulnerability to predators because it is a hindrance in flight, and it renders the bird conspicuous in general. [7] Similar examples are manifold, such as in birds of paradise [8] and argus pheasants. [citation needed] Another example of sexual dichromatism is that of nestling blue tits. Males are ...
Home (. The X-Files. ) The Peacock family burying their child alive. Due to its graphic nature, as illustrated by this scene, "Home" became the first episode of The X-Files to receive a viewer discretion warning. " Home " is the second episode of the fourth season of the American science fiction television series The X-Files, which originally ...