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" The action of climate seems at first sight to be quite independent of the struggle for existence ; but in so far as climate chiefly acts in reducing food, it brings on the most severe struggle between the individuals, whether of the same or of distinct... "
On the Origin of Species: By Means of Natural Selection Or the Preservation ... - Стр. 44
авторы: Charles Darwin - 2007 - Страниц: 328
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Intelligence in Plants and Animals: Being a New Edition of the Author's ...

Thomas George Gentry - 1900 - Страниц: 489
...altogether independent of the Struggle for Existence ; but in so far as it chiefly acts in the reduction of food, it brings on the most severe struggle between the individuals, whether of the same or different species, which subsist on the same kind of fare. Even when climate, extreme cold for example,...
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An Easy Outline of Evolution

Dennis Hird - 1903 - Страниц: 240
...when we remember that ten per cent, is an extraordinarily severe mortality from epidemics with men. The action of climate seems at first sight to be quite...struggle between the individuals, whether of the same or distinct species, which subsist on the same kind of food " (P- 54). When a species, owing to highly...
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Evolution and Adaptation

Thomas Hunt Morgan - 1903 - Страниц: 470
...species, and periodical seasons of extreme cold or drought seem to be the most effective of all checks." "The action of climate seems at first sight to be...struggle for existence ; but in so far as climate acts in reducing food, it brings on the most severe struggle between the individuals, whether of the...
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The Origin of Species

Charles Darwin - 1909 - Страниц: 552
...estimated ( chiefly Trom~ tHe greatly reduced numbers of nests in the spring) that the winter of 1854-5 destroyed fourfifths of the birds in my own grounds...cold, acts directly, it will be the least vigorous individuals, or those which have got least food through the advancing winter, which will suffer most....
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Progressive Readings in Prose

Rudolph Wilson Chamberlain, Joseph Sheldon Gerry Bolton - 1923 - Страниц: 376
...effective of all checks. I estimated (chiefly from the greatly reduced numbers of nests in the spring) that the winter of 1854-55 destroyed four-fifths of...cold, acts directly, it will be the least vigorous individuals, or those which have got least food through the advancing winter, which will suffer most....
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Annual Report of the Board of Regents of the Smithsonian Institution

Smithsonian Institution. Board of Regents - 1906
...leading exponents of the doctrine of natural selection. To quote Mr. Darwin's own words on this point: The action of climate seems at first sight to be quite...for existence ; but, in so far as climate chiefly act:; in reducing food, it brings on the most severe struggle between the individuals, whether of the...
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Annual Report of the Board of Regents of the Smithsonian Institution

Smithsonian Institution. Board of Regents - 1906
...leading exponents of the doctrine of natural selectfcm. To quote Mr. Darwin's own words on this point : The action of climate seems at first sight to be quite independent of the struggle for existence; hut, in so far as climate chiefly nets in redwing food, it brings on the most severe struggle between...
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Ecological Genetics

David J. Merrell - Страниц: 500
...the word competition in these passages. Later, however (p. 84), he does use the word in this context. The action of climate seems at first sight to be quite...distinct species, which subsist on the same kind of food. . . . Each species, even where it most abounds, is constantly suffering enormous destruction at some...
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The European Origins of Scientific Ecology (1800-1901)

Pascal Acot - 1998 - Страниц: 932
...less game than at present, although hundreds of thousands of game animals are now annually killed. 197 On the other hand, in some cases, as with the elephant...kind of food. Even when climate, for instance extreme CHAP. III. CHECKS TO INCREASE. 69 cold, acts directly, it will be the least vigorous, or those which...
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Infertilities: Exploring Fictions of Barren Bodies

Robin Truth Goodman - 2001 - Страниц: 234
...environmental factors, such as seasonal variation and the proximity of competitors within the region: "The action of climate seems at first sight to be...distinct species, which subsist on the same kind of food" (96). Reproduction enters the picture as a ratio of population 1ncrease, which puts added pressure...
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