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A Monitoring Technique for Assessing Effects of Pollutants on Fish Activity
RE. Blanchard
GT. Collins
R. D'Allessandris
JW. Fisher
CB. Harrah
EL. Klosterman
LA. Muhic
JF. Umina
出版
ASTM International
, 1982
URL
http://books.google.com.hk/books?id=SP16zgEACAAJ&hl=&source=gbs_api
註釋
This study describes a method for monitoring the activity of aquatic organisms and reports preliminary results using hydrazine as the pollutant. Activity was detected using strain gages attached to immersed stainless steel paddles. Fish changing position or maintaining their position in the water column created water disturbances, and the relative amount of the water disturbance was used as an index of activity. Analog outputs from the gages were conditioned, amplified, recorded on frequency modulation (FM) magnetic tape, and processed off-line by computer. A computer program was developed that calculated mean absolute voltage levels of combined signals over 1-min intervals.
