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Publication Detail
BONY FISHES Blind Cavefish
  • Publication Type:
    Chapter
  • Authors:
    Yamamoto Y, Jeffery WR
  • Publisher:
    Elsevier Academic
  • Publication date:
    03/01/2011
  • Place of publication:
    Amsterdam
  • Pagination:
    1843, 1849
  • Volume:
    3
  • Edition:
    1st
  • Editors:
    Farrell AP
  • ISBN-13:
    9780123745453
  • Medium:
    Print + ebook
  • Status:
    Published
  • Book title:
    Encyclopedia of Fish Physiology
  • Language:
    English
  • Number of volumes:
    3
  • Translators:
    Not applicable
  • Series editors:
    Not applicable
  • Keywords:
    Albinism, Cavefish, Constructive traits, Development, Evolution, Eye degeneration, Feeding apparatus amplification, Genetics, Regressive traits, Troglomorphism
  • Addresses:
    UCL
    London

    University of Maryland
    College Park
Abstract
Blind cavefish have evolved a suite of troglomorphic traits that are shared with other cave animals. Troglomorphism includes regressive traits, such as loss of eyes and pigmentation, and constructive traits, such as amplification of the feeding apparatus. The genetic and developmental mechanisms of troglomorphism are best understood in the cavefish Astyanax mexicanus. A few of the genes involved in troglomorphism have now been identified. In some cases, the constructive and regressive traits are linked by pleiotropy. The evolutionary forces that generated troglomorphism probably include both neutral mutation and natural selection for traits that are beneficial to cave life.
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