Special Scientific Report: Fisheries, Números 525-540National Marine Fisheries Service, 1965 |
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Página 5
... to 140 pulses per second cause very rapid swimming undulations , but frequencies above 140 tend to narcotize . Excessively high fre- quencies have no apparent effect upon fish . McMillan ( 1928 ) observed no reaction when salmon were 5.
... to 140 pulses per second cause very rapid swimming undulations , but frequencies above 140 tend to narcotize . Excessively high fre- quencies have no apparent effect upon fish . McMillan ( 1928 ) observed no reaction when salmon were 5.
Página 6
... salmon were subjected to 500,000 cycle a.c. Although pulsations can set up the strong rhythmical flexures required for galvanotaxis , a certain minimal amount of electrical energy must reach the fish . If the time ( duration ) of the ...
... salmon were subjected to 500,000 cycle a.c. Although pulsations can set up the strong rhythmical flexures required for galvanotaxis , a certain minimal amount of electrical energy must reach the fish . If the time ( duration ) of the ...
Página 12
... salmon parr ex- hibited the best response below 25o C. , and suckers at less than 20 ° C. Webster , Forney , Gibbs , Severns , and Van Woert ( 1955 ) had greater success in shocking brown trout at 7.7 ° C. than at 16.6 ° C. , when both ...
... salmon parr ex- hibited the best response below 25o C. , and suckers at less than 20 ° C. Webster , Forney , Gibbs , Severns , and Van Woert ( 1955 ) had greater success in shocking brown trout at 7.7 ° C. than at 16.6 ° C. , when both ...
Página 13
... salmon fry subjected to the pulsed d.c. were killed in the estuary , but those 200 yards up- stream , in waters of 30,000 ohm cm.3 , were not damaged . This mortality from pulsed d.c. is in accord with Whitney and Pierce's ( 1957 ) ...
... salmon fry subjected to the pulsed d.c. were killed in the estuary , but those 200 yards up- stream , in waters of 30,000 ohm cm.3 , were not damaged . This mortality from pulsed d.c. is in accord with Whitney and Pierce's ( 1957 ) ...
Página 14
... salmon and speckled trout and the effect of temperature on the response to an electrical stimulus . Physiol . Zool . 23 ( 1 ) : 27-34 . GRAY , J. 1936. Studies in animal locomotion . IV . The neuromuscular mechanism of swimming in the ...
... salmon and speckled trout and the effect of temperature on the response to an electrical stimulus . Physiol . Zool . 23 ( 1 ) : 27-34 . GRAY , J. 1936. Studies in animal locomotion . IV . The neuromuscular mechanism of swimming in the ...
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Pasajes populares
Página 71 - UNITED STATES DEPARTMENT OF THE INTERIOR FISH AND WILDLIFE SERVICE UNITED STATES DEPARTMENT OF THE INTERIOR, Fred A.
Página 4 - US DEPARTMENT OF THE INTERIOR, FISH AND WILDLIFE SERVICE, BUREAU OF COMMERCIAL FISHERIES, Washington, DC, June 13, 1962.
Página 10 - Hydr., 36: 57-130. 1941. Age and growth of the rock bass, Ambloplites rupestris (Rafinesque), in Nebish Lake, Wisconsin.
Página 7 - This project covers the expenses of the two American members of the International Board of Inquiry for the Great Lakes Fisheries...
Página 7 - An investigation of the relative efficiencies of natural and artificial propagation of sockeye salmon (Oncorhynchus nerka) at Cultus Lake, British Columbia.
Página 57 - No. 23, 26 pp. 1948. A record of pilchard eggs and larvae collected during surveys made in 1939 to 1941. US Dept.
Página 60 - I would appreciate it. (The information referred to follows :) DEPARTMENT OF THE INTERIOR, FISH AND WILDLIFE SERVICE, BUREAU OF COMMERCIAL FISHERIES, Washington, DC Hon.