Page - 49 - in The Origin of Species
Image of the Page - 49 -
Text of the Page - 49 -
UNCONSCIOUS SELECTION 49
breeding of domestic animals was carefully attended to in
ancient times, and is now attended to by the lowest savages.
It would, indeed, have been a strange fact, had attention
not been paid to breeding, for the inheritance of good and
bad qualities is so obvious.
UNCONSCIOUS SELECTION
At the present time, eminent breeders try by methodical
selection, with a distinct object in view, to make a new strain
or sub-breed, superior to anything of the kind in the country.
But, for our purpose, a form of Selection, which may be
called Unconscious, and which results from every one trying
to possess and breed from the best individual animals, is more
important. Thus, a man who intends keeping pointers nat-
urally tries to get as good dogs as he can, and afterwards
breeds from his own best dogs, but he has no wish or expec-
tation of permanently altering the breed. Nevertheless we
may infer that this process, continued during centuries, would
improve and modify any breed, in the same way as Bakewell,
Collins, etc., by this very same process, only carried on more
methodically, did greatly modify, even during their lifetimes,
the forms and qualities of their cattle. Slow and insensible
changes of this kind can never be recognised unless actual
measurements or careful drawings of the breeds in question
have been made long ago, which may serve for comparison.
In some cases, however, unchanged, or but little changed
individuals of the same breed exist in less civilised districts,
where the breed has been less improved. There is reason to
believe that King Charles' spaniel has been unconsciously
modified to a large extent since the time of that monarch.
Some highly competent authorities are convinced that the
setter is directly derived from the spaniel, and has probably
been slowly altered from it. It is known that the English
pointer has been greatly changed within the last century, and
in this case the change has, it is believed, been chiefly effected
by crosses with the foxhound : but what concerns us is. that
the change has been effected unconsciously and gradually, and
yet so effectually, that, though the old Spanish pointer cer-
tainly came from Spain, Mr. Borrow has not seen, as I am
back to the
book The Origin of Species"
The Origin of Species
- Title
- The Origin of Species
- Author
- Charles Darwin
- Publisher
- P. F. Collier & Son
- Location
- New York
- Date
- 1909
- Language
- English
- License
- PD
- Size
- 10.5 x 16.4 cm
- Pages
- 568
- Keywords
- Evolutionstheorie, Evolution, Theory of Evolution, Naturwissenschaft, Natural Sciences
- Categories
- International
- Naturwissenschaften Biologie
Table of contents
- EDITOR'S INTRODUCTION 5
- AN HISTORICAL SKETCH of the Progress of Opinion on the Origin of Species 9
- INTRODUCTION 21
- Variation under Domestication 25
- Variation under Nature 58
- Struggle for Existence 76
- Natural Selection; or the Survival of the Fittest 93
- Laws of Variation 145
- Difficulties of the Theory 178
- Miscellaneous Objections to the Theory of Natural Selection 219
- Instinct 262
- Hybridism 298
- On the Imperfection of the Geological Record 333
- On the Geological Succession of Organic Beinss 364
- Geographical Distribution 395
- Geographical Distribution - continued 427
- Mutual Affinities of Organic Beings: Morphology: Embryology: Rudimentary Organs 450
- Recapitulation and Conclusion 499
- GLOSSARY 531
- INDEX 541