Download e-book for kindle: Salmonine Introductions to the Laurentian Great Lakes : An by Stephen S Crawford, Stephen S. Craford

By Stephen S Crawford, Stephen S. Craford

ISBN-10: 0660176394

ISBN-13: 9780660176390

This e-book offers an old assessment and evaluate of documented ecological results linked to salmonine introductions to the Laurentian nice Lakes. The advent of salmonines to the good Lakes date again to the 1870s, while common populations of local salmonines within the nice Lakes have been in serious decline. utilizing confirmed review protocols, it was firm that there's facts of vital ecological results in six assorted different types: illnesses and parasites, predation on local species, festival for restricting assets, genetic alteration, environmental alteration, and group alteration. Taken jointly, this physique of proof helps the realization that the continued advent of non-native salmonines poses an ecologically-significant possibility to the good Lakes environment and its local organisms, and that the introductions will be terminated.

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Additional info for Salmonine Introductions to the Laurentian Great Lakes : An Historical Review and Evaluation of Ecological Effects

Sample text

At the time this view was taken there were in this pond between three and four hundred adult salmon, weighing from six to sixteen pounds each. It is doubtful, indeed, whether in any other part of the world a more wonderful or pleasing exhibition can be enjoyed at one sight, of such numbers of large salmon as were enclosed within this small space. ” (Wilmot 1878, p. qxd 14/02/2001 3:57 PM Page 23 History of introduced salmonines in the Great Lakes 23 Fig. 11. Natural history museum at Samuel Wilmot’s pioneering fish-breeding establishment for Atlantic salmon (Salmo salar) and chinook salmon (Oncorhynchus tshawytscha) on Wilmot’s Creek (Lake Ontario basin) at Newcastle, Ontario — circa 1877.

Qxd 32 14/02/2001 3:57 PM Page 32 Salmonine Introductions to the Laurentian Great Lakes Fig. 16. Number of brown trout (Salmo trutta) stocked by jurisdiction in Lake Ontario for the period 1966–1998. qxd 14/02/2001 3:57 PM Page 33 History of introduced salmonines in the Great Lakes Fig. 17. Number of brown trout (Salmo trutta) stocked by jurisdiction in Lake Erie for the period 1966–1998. qxd 34 14/02/2001 3:57 PM Page 34 Salmonine Introductions to the Laurentian Great Lakes Fig. 18. Number of brown trout (Salmo trutta) stocked by jurisdiction in Lake Huron for the period 1966–1998.

The process of taking the ova from the fish and impregnating; ... this is done by lifting from the tank a ripe female fish and holding her over a vessel securely, and gently pressing her body with the hand when the eggs will flow freely from her. ” (Wilmot 1878, p. qxd 18 14/02/2001 3:57 PM Page 18 Salmonine Introductions to the Laurentian Great Lakes Fig. 8. “Wilmots Patent Self-Picking & Cleaning Apparatus” used at Samuel Wilmot’s pioneering fish-breeding establishment for Atlantic salmon (Salmo salar) and chinook salmon (Oncorhynchus tshawytscha) on Wilmot’s Creek (Lake Ontario basin) at Newcastle, Ontario — circa 1877.

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Salmonine Introductions to the Laurentian Great Lakes : An Historical Review and Evaluation of Ecological Effects by Stephen S Crawford, Stephen S. Craford


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