SUMMARY AND CONCLUSIONS 



LITERATURE CITED 



The results of tiiis study on the effects 

 of sound waves on young salmon are in close 

 agreement with the results obtained in the 

 Fish and Wildlife Service's study on trout at 

 Leetown, W. Va. (Burner and Moore, 1953). 

 In both series of experiments, the only posi- 

 tive reaction noted at any time was the "start" 

 exhibited by fish the first time they are sub- 

 jected to a new sound. After the initial "start", 

 which is instantaneous, the test fish apparently 

 are no longer aware of the sound. 



There is, of course, the possibility that 

 there is a particular frequency or quality of 

 sound that will either attract or repell these 

 young salmon. Within the limits of our work, 

 however, we have found no such sound. Should 

 such a sound ever be found to be effective under 

 laboratory conditions, there seems to be no 

 likelihood that it would be effective under field 

 conditions. The fact that nadjral noises in the 

 water are so great, even in a relatively calm 

 lake, makes the use of sound in the undoubtedly 

 noisier waters of streams, rivers, or around 

 hydroelectric or other dams most unlikely. 

 Here, the noises already present could easily 

 obliterate any noise introduced for guiding pur- 

 poses. 



The results of the testing did not show suf- 

 ficient response to analyse statistically. The 

 sound waves were ineffective as an attracting 

 or repelling force. Minor differences in dis- 

 tribution following the tests were attributed to 

 chance rather than to an effect of sound waves. 



Brett, J.R.D. MacKinnon and D. F. 

 Alderdice. 



1954. Trough experiments on guiding 



sockeye salmon fingerlings . 



Fish. Res. Bd. Canada, Prog. 



Repts. Pac. Coast Sta's., No. 99: 



pp. 24-27. 



Burner, Clifford), and Harvey L. Moore. 



1953. Attempts to guide small fish 

 with underwater sound. 



Fish and Wildlife Service Spec . 

 Sci. Rept. No. HI, 38 pp. 



Collins, Gerald B. 



1954. Research on anadromous fish 

 passage at dams. Trans. 19th 

 North American Wildlife Conf., 

 pp. 418-423. 



Duncan, Rea E . 



1956. The use of infrared radiation 

 in the study of fish behavior. 

 Fish and Wildlife Service Spec . 

 Sci . Rept .No 1 70 (in press ) 



Hamilton, J. A R., and F.J. Andrew. 



1954. An investigation of the effect 

 of Baker Dam on downstream - 

 migrant salmon. 



Internat . Pac . Salmon Fish . Comm . 

 Bull . No . 6, 73 p . 



Schoeneman, Dale E., and CO. Junge, Jr. 

 1954. Investigations of mortalities 

 to downstream migrant salmon 

 at two dams on the Elwha River. 

 Washington Dept. Fish. Res. 

 Bull. No. 3. 51 p. 



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