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Description: |
19 pages : illustrations, map, diagrams ; 24 cm |
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Bibliography Note: |
Includes bibliographical references (page 19). |
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Contents Note: |
Contents: Description of the experiment -- Analysis of results -- Discussion -- Summary and conclusions. |
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Summary, Etc. Note: |
Abstract: On Kodiak Island in Karluk Lagoon, 6,253 salmon were tagged in 1953 to determine the effect of gill-net marks for survival and spawning. Approximately half of these fish were gill-net marked and the remainder unmarked (control) fish. |
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Abstract: Numbered tags of several color combinations were used so that observations could be made on each group of fish both enroute to and on the spawning grounds. |
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Abstract: The results of the study show that the greatest mortality of new-marked fish occurred shortly after the fish were tagged and released. It is estimated that between 10 and 20 percent of the gill-net-marked fishe escaping from gill nets die from webbing injuries. No difference was noted in the travel time of tagged control and tagged gill-net-marked fish from the lagoon to the spawning grounds. No significant difference was found between the spawning conditions of gill-net-marked fish and the control fish. There was a general tendency for gill-net marks to heal, and no relation was found between the seriousness of the gill-net marks and the survival of the fish. |
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Additional Physical Forms: |
Online version: Nelson, Philip R. Survival and spawning of gill-net-marked red salmon. Washington, DC : U.S. Govt. Print. Off., 1955 (OCoLC)795026186 |
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Name Added Entry: |
Abegglen, Carl E., author. |