2 edition of Use of electric fish diversion weirs at Northwest salmon-cultural stations found in the catalog.
Use of electric fish diversion weirs at Northwest salmon-cultural stations
United States. Bureau of Sport Fisheries and Wildlife.
|Statement||United States, Department of the Interior, Fish and Wildlife Service, Bureau of Sport Fisheries and Wildlife, Region I (Pacific).|
|The Physical Object|
|Pagination||iii, 31 p. :|
|Number of Pages||31|
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He caught 62 salmon inand in He thinks that the removal of obstructions to the passage of fish to their spawning-grounds would be all that is necessary to secure a good run of fish in the river, but believes that under present conditions the salmon-cultural work of the Government is very useful in sustaining the fishery.
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O Scribd é o maior site social de leitura e publicação do mundo. The required increase in food to maintain this higher fish density can be achieved in several ways: increasing the product- ion of natural food through the use of chemical and organic fertili- zer, in our case waste effluent; better utilization of existing nat- ural foods through polyculture, i.e., the introduction of carefully selected species.