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Survival and spawning of gill-net-marked red salmon

Author: Philip R Nelson; Carl E Abegglen
Publisher: Washington, DC : U.S. Govt. Print. Off., 1955.
Series: Research report (U.S. Fish and Wildlife Service), 40.
Edition/Format:   Print book : EnglishView all editions and formats
Summary:
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.

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.

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.  Read more...

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Additional Physical Format: Online version:
Nelson, Philip R.
Survival and spawning of gill-net-marked red salmon.
Washington, DC : U.S. Govt. Print. Off., 1955
(OCoLC)795026186
Document Type: Book
All Authors / Contributors: Philip R Nelson; Carl E Abegglen
OCLC Number: 3947294
Description: 19 pages : illustrations, map, diagrams ; 24 cm.
Contents: Description of the experiment --
Analysis of results --
Discussion --
Summary and conclusions.
Series Title: Research report (U.S. Fish and Wildlife Service), 40.
Responsibility: by Philip R. Nelson and Carl E. Abegglen.

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.

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.

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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