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Description
English:

Identifier: descentofmansele02darw (find matches)
Title: The descent of man, and selection in relation to sex
Year: 1871 (1870s)
Authors: Darwin, Charles, 1809-1882
Subjects: Evolution Natural selection Heredity Human beings -- Origin Evolution
Publisher: London, J. Murray
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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e. ^ The keeper of the Stormontfield breeding-ponds visited, as Mr. Buist informs me, in June, 1868,the northern Tyne, and found about 300 dead salmon,all of which with one exception were males; and he wasconvinced that they had lost their lives by fighting. The most curious point about the male salmon isthat durino^ the breeding-season, besides a slii2:ht chano-ein colour, the lower jaw elongates, and a cartilaginous projection turns upwards from the point, which, when the jaws are closed, occupies a deep cavity between 5 The Field/ June 29th, 1867. For Mr. Shaws statement, see Edinburgh Review, 1843. Another experienced observer (Scropes Days of Salmon Fishing, p. 60) remarks that the male would, if hecould, keep, like the stag, all other males away. B 2 SEXUAL SELECTION. Part IL the intermaxillary bones of tlie upper jaw.^ (Figs.26 and 27.) In our salmon this change of structurelasts only during the breeding-season ; but in the Sahnohjcaodon of N.W. America the change, as Mr. J. K.
Text Appearing After Image:
Pig. 26. Head of male of common salmon (Salmo salar) during the breeding-season. (This drawing, as well as all the others in the present chapter, have been executed bythe well-known artist, Mr. G. Ford, under the kind superintendence of Dr. Glinther, fromspecimens in the British Museum.) 6 Yarrell, History of British Fishes, voL ii. 1836, p. 10. Chap. XII. FISHES. Lord^ believes, is permanent and best marked in tlieolder males whicli have previously ascended the rivers.Iq these old males the jaws become developed into im-mense hook-like projections, and the teeth grow intodescentofmansele02darw

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Flickr tags
InfoField
  • bookid:descentofmansele02darw
  • bookyear:1871
  • bookdecade:1870
  • bookcentury:1800
  • bookauthor:Darwin__Charles__1809_1882
  • booksubject:Evolution
  • booksubject:Natural_selection
  • booksubject:Heredity
  • booksubject:Human_beings____Origin
  • bookpublisher:London__J__Murray
  • bookcontributor:MBLWHOI_Library
  • booksponsor:MBLWHOI_Library
  • bookleafnumber:15
  • bookcollection:biodiversity
  • bookcollection:MBLWHOI
  • bookcollection:blc
  • bookcollection:americana
  • BHL Collection
  • BHL Consortium
Flickr posted date
InfoField
30 July 2014

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