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<br />. <br /> <br />Moni. toring <br /> <br />. <br /> <br />Two typeS of monitoring were conducted during this investigation, 2-hour <br />and 24-hour monitoring. Two-hour monitoring was conducted 2!!- as many fish s.e <br />possible during each field trip. The primary purpose of this type of <br />monitoring was to locate each fish on the ground and take physical mepsurements <br />on preferred habitat utilized by the fish. ~ntv-four hour monitorin9 was <br />conducted ~ each radiotaqqed fish ~e during the course of the investigation <br />to determine diel movements patterns and habitat use. <br /> <br />. <br /> <br />. <br /> <br />Two-hour monitoring. Once a fish was contacted and its location <br />triangulated (as described above), the fish was observed for 30 minutes to <br />determine if it was stationary, indicating that it was in preferred habitat. <br />The fish was then observed for an additional 1 to 2 hou;:.s. During this time <br />the location of the fish was checked every 1:0-15 minutes and records of <br />behavior, movement, and habitat utillzed were kept on radio telemetry report <br />forms provided by the FWS. Field maps of the river stretch occupied by the <br />fish, including prominent features of the channel along with the location of <br />the fish and movements, were illustrated on each telemetry report. Upon <br />completion of the monitoring, habitat measurements were taken at locales <br />utilized by the fish for a period of 15 minutes or longer. <br /> <br />. <br /> <br />. <br /> <br />If the fish was moving upon initial contact, movements were followed and <br />recorded for periods of up to 6 hours depending on the effort expended to <br />locate and reach a given fish. If the fish stopped moving, the procedure <br />explained above was followed. If the fish continued to move, no measurements <br />were taken. When possible, the fish was relocated later in the day to see if <br />it had stopped moving. If so, 2-hour monitoring was conducted. <br /> <br />. <br /> <br />Twenty-four hour monitoring. Twenty-four hour monitoring was conducted <br />once on each fish during this investigation. Generally, 24-hQur monitoring was <br />conducted ~ two to four fish dyrinq each field triQ. Twenty-four hour <br />monitoring was usually begun by first completing a 2-hour monitoring procedure <br />as described above. Following that, location and movements of the fish were <br />~p-ckp-d and recorded at intervals generally not exceeding 2 hours. Often, the <br />fish would move to different locations during the 24-hour period and remain <br />stationary at the new location for a substantial time period. In that case, <br />additional habitat measurements were taken at the new locations upon the <br />completion of the 24-hour period. ~ of. the ~ive,r stretch utilize2 by the <br />fish as described above were completed for each 24-hour monitoring period. <br />- - - - <br /> <br />. <br /> <br />Habi tat Measurements <br /> <br />. <br /> <br />Upon completion of a 2-hour or 24-hour monitoring period, habitat <br />measurements including water depth, water velocity, water temperature, cover <br />and dominant and secondary substrate were taken at each location where the fish <br />was stationary for 15 minutes or longer. Measurements were taken from either a <br />boat or by wading at three points relative to the fish; a set at the point of <br />triangulation ('nose' measurement), a set one meter out toward the river <br />channel (' out' measurement), and a set one meter in toward the shore (' in' <br />measurement) from the point of triangulation. The 'nose' measurements included <br /> <br />. <br /> <br />9 <br /> <br />. <br />