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Biology and Ecology of the Brown and Sea Trout: State of the Art and Research Themes - Softcover

 
9781852333171: Biology and Ecology of the Brown and Sea Trout: State of the Art and Research Themes
Softcover
ISBN 10: 1852333170 ISBN 13: 9781852333171
Publisher: Springer, 2000

Synopsis

ORDER Salmoniformes j FAMILY Salmomdae SUB-F AMIL Y Coregonidae Salmoninae Thymallinae GENUS Oncorhynchus Salmo Salvelinus SPECIES Salmo trutta Salmo salar Fig. 1. (Legendre, 1980). The three main genera (Salmo, Oncorhynchus, Salvelinus) known to­ day appeared more recently (at the start of the Pleistocene) from this common ancestry (Jones, 1959). The separation of the American and Euro-Asiatic continents and the subse­ quent succession of glaciation ages of the Pleistocene and recent eras has not only resulted in the differentiation of these three genera but also the appearances of numerous lower level taxa (Jones, 1959; Hoar, 1976). However, according to Tchernavin (1939), anadromous behaviour appeared at the start of the Ice Age. However, Balon (1980) considers that this behaviour existed before speciation in the Salmonid family and that the marine types, mainly of the genus Salmo would have formed the origin of the freshwater forms. From this well-argued theory of Balon (1980), Thorpe (1982) deduced that the salmonids were in fact primitive teleosts, probably of marine origin, and that certain species may have progressively lost their anadromous behaviour.

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From the Back Cover

ORDER Salmoniformes j FAMILY Salmomdae SUB-F AMIL Y Coregonidae Salmoninae Thymallinae GENUS Oncorhynchus Salmo Salvelinus SPECIES Salmo trutta Salmo salar Fig. 1. (Legendre, 1980). The three main genera (Salmo, Oncorhynchus, Salvelinus) known to­ day appeared more recently (at the start of the Pleistocene) from this common ancestry (Jones, 1959). The separation of the American and Euro-Asiatic continents and the subse­ quent succession of glaciation ages of the Pleistocene and recent eras has not only resulted in the differentiation of these three genera but also the appearances of numerous lower level taxa (Jones, 1959; Hoar, 1976). However, according to Tchernavin (1939), anadromous behaviour appeared at the start of the Ice Age. However, Balon (1980) considers that this behaviour existed before speciation in the Salmonid family and that the marine types, mainly of the genus Salmo would have formed the origin of the freshwater forms. From this well-argued theory of Balon (1980), Thorpe (1982) deduced that the salmonids were in fact primitive teleosts, probably of marine origin, and that certain species may have progressively lost their anadromous behaviour.

"About this title" may belong to another edition of this title.

Publisher
Springer
Publication date
2000
Language
English
ISBN 10 
1852333170
ISBN 13 
9781852333171
Binding
Paperback
Number of pages
339
Editor
Bagliniere J. L., Maisse Gerard