Evolution in the Dark

Evolution in the Dark
Author :
Publisher : Springer
Total Pages : 223
Release :
ISBN-10 : 9783662545126
ISBN-13 : 3662545128
Rating : 4/5 (26 Downloads)

Book Synopsis Evolution in the Dark by : Horst Wilkens

Download or read book Evolution in the Dark written by Horst Wilkens and published by Springer. This book was released on 2017-05-25 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.


Evolution in the Dark Related Books

Evolution in the Dark
Language: en
Pages: 223
Authors: Horst Wilkens
Categories: Science
Type: BOOK - Published: 2017-05-25 - Publisher: Springer

DOWNLOAD EBOOK

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 Asty
Fishing in Many Waters
Language: en
Pages: 265
Authors: James Hornell
Categories: Social Science
Type: BOOK - Published: 2015-02-12 - Publisher: Cambridge University Press

DOWNLOAD EBOOK

Originally published in 1950, this book presents a comprehensive anthropological discussion of fishing written by the renowned British ethnographer and zoologis
Puget Sound Marine Station Publications
Language: en
Pages: 416
Authors: Puget Sound Biological Station
Categories: Marine biology
Type: BOOK - Published: 1917 - Publisher:

DOWNLOAD EBOOK

A Home on the Deep; Or, The Mariner's Trials on the Dark Blue Sea
Language: en
Pages: 490
Authors:
Categories: Seafaring life
Type: BOOK - Published: 1858 - Publisher:

DOWNLOAD EBOOK

On the Edge of the Dark Sea of Darkness
Language: en
Pages: 305
Authors: Andrew Peterson
Categories: Juvenile Fiction
Type: BOOK - Published: 2023-05-16 - Publisher: WaterBrook

DOWNLOAD EBOOK

PUBLISHERS WEEKLY AND ECPA BESTSELLER • Now in paperback! Once, in a cottage above the cliffs on the Dark Sea of Darkness, there lived three children and thei