Evolution of the Giraffe

  title={Evolution of the Giraffe},
  author={A. Brownlee},
THE mode of evolution in the giraffe has been a favourite subject for discussion, Darwin1 wrote “… it has been supposed that all the parts must have been simultaneously modified; and it has been argued that, on the principle of natural selection, this is scarcely possible … but it cannot be denied that an animal might have its neck, or head, or tongue, or forelimbs elongated a very little without any corresponding modification in other parts of the body”, Graham Cannon2, very properly I… 
Winning by a Neck: Sexual Selection in the Evolution of Giraffe
It is concluded that sexual selection has been overlooked as a possible explanation for the giraffe's long neck, and on present evidence it provides a better explanation than one of natural selection via feeding competition.
Understanding selection for long necks in different taxa
The evolution of long necks across a wide range of (both living and extinct) taxa is considered and it is concluded that in most cases long necks can be explained in terms of foraging requirements, and that alternative explanations of sexual selection, thermoregulation and predation pressure are not as well supported.
From fetus to adult--an allometric analysis of the giraffe vertebral column.
The giraffe T1 is a transitional vertebra whose scaling exponent and length is between that of the cervical and thoracic series, and the other dimensions taken show that giraffe vertebral morphology exhibit adaptations to biomechanical strain.
Seasonal and geographical influences on the feeding ecology of giraffes in the Luangwa Valley, Zambia: 1973–2014
The evolutionary ecology of giraffes has probably benefitted from a foraging strategy that includes a variable and high-quality diet during the hot, dry season, when feeding pressures are greatest, resulting in an animal that is well adapted for survival in an arid environment.


The Variation of Animals and Plants under Domestication
of the reasons which induce me to believe that all organic beings occasionally cross, though perhaps in some cases only at long intervals of time. (15/14. With respect to plants, an admirable essay
Darwin and the Darwinian Revolution
In her enduring study of the impact of Darwinism on the intellectual climate of the nineteenth century, Gertrude Himmelfarb brings massive documentation to bear in challenging the conventional view
Geographical Distribution of the Body-Weight/Body-Surface Ratio
IN the course of biometrical work concerning twenty different human samples—the individual figures partly obtained by myself and partly taken from other sources—I have found the following values for