Evolution in the Dark EBOOK Tooltip Darwin's Loss Without Selection

Auteur: Horst Wilkens
Taal: Engels
Evolution in the Dark
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  • Engels
  • E-book
  • 9783662545126
  • mei 2017
  • Adobe ePub
Alle productspecificaties

Samenvatting

This book provides fascinating insights into the development and genetics of evolutionary processes on the basis of animals living in the dark, such as the Astyanax cave fish. Biologically functionless traits show high variability, which results from neutral deleterious mutations no longer being eliminated by natural selection, which normally acts to preserve functional capability. These negative mutations accumulate until the traits they are responsible for become rudimentary or even lost. The random genetic basis of regressive evolution is in accordance with Nei's Neutral Theory of Molecular Evolution, which applies to the molecular level. Such processes are particularly conspicuous in species living in constant darkness, where, for example in Astyanax, all traits depending on the exposure to light, like eyes, pigmentation, visually triggered aggressive behaviour, negative phototaxis, and several peripheral outcomes of circadian rhythmicity, are useless and diminish. In compensation constructive traits like taste, olfaction or the lateral line senses are improved by selection and do not show variability. Regressive and constructive traits inherit independently, proving that the rudimentation process is not driven by pleiotropic linkage between them. All these traits are subject to mosaic evolution and exhibit unproportional epistatic gene effects, which play an important role in evolutionary adaptation and improvement. Offering valuable evolutionary insights and supplemented by a wealth of illustrations, this book will appeal to evolutionary and developmental biologists alike.

Recensie(s)

Anyone who works on any aspect of the biology of this species will need to read this book from cover to cover, certainly more than once, and become critically familiar with the very many details of all aspects of the life of this animal. This book is amongst the most important books on subterranean biology ever written and should be essential reading for all interested in life in the dark. (G. Proudlove, Journal of Fish Biology, Vol. 91 (6), 2017)

Productspecificaties

Inhoud

Taal
Engels
Bindwijze
E-book
Verschijningsdatum
mei 2017
Ebook formaat
Adobe ePub
Illustraties
Nee

Betrokkenen

Auteur
Horst Wilkens Ulrike Strecker
Co-auteur
Ulrike Strecker
Uitgever
Springer

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EAN

EAN
9783662545126

Overige kenmerken

NUR code
922
Subtitel
Darwin's Loss Without Selection
Thema Subject Code
PSAJ

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