Historical Harmonic Mean Travel Time Estimates
Adult Radiotelemetry Bonneville to Lower Granite Lamprey

Click on a reach travel time in the table to view a plot of the reach-specific daily mean travel time as it varies throughout the season. Reach travel time is based on the last record at the top-of-ladder site (LT) at the first project and the first approach record (A1**) at the second project. The date of the daily mean travel time is determined by and plotted on the reach entry date, i.e., the date of the last record at the top-of-ladder site (LT) for each Radio Telemetry tagged fish at the first project in the reach. The plots include a 95% confidence interval for each reach entry date on which more than one fish started traversing the reach.

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Harmonic mean travel times by reach and year:

  Reach   1997   1998   1999   2000   2001   2002

BON-TDA   7.82   5.02   8.72   5.08   4.96   5.30
BON-JDA   ****  10.95  11.42   9.99   8.66  10.22
BON-MCN   ****   ****   ****  15.62  14.00  14.21
TDA-JDA   ****   3.15   3.29   2.42   2.01   2.28
TDA-MCN   ****   ****   ****   9.85   7.59  10.08
JDA-MCN   ****   ****   ****   5.54   4.24   5.14

Standard errors by reach and year:

  Reach   1997   1998   1999   2000   2001   2002

BON-TDA   1.10   0.57   1.01   0.39   0.37   0.38
BON-JDA   ****   1.43   2.97   0.84   0.75   0.79
BON-MCN   ****   ****   ****   1.73   1.07   8.47
TDA-JDA   ****   0.67   0.59   0.33   0.26   0.34
TDA-MCN   ****   ****   ****   1.20   0.73   6.57
JDA-MCN   ****   ****   ****   0.87   0.25   2.92

Counts by reach and year:

  Reach   1997   1998   1999   2000   2001   2002

BON-TDA     16     37     23     84     92     69
BON-JDA      0      9      3     36     42     31
BON-MCN      0      0      0     11      9      2
TDA-JDA      0      9      2     36     42     31
TDA-MCN      0      0      0     11      9      2
JDA-MCN      0      0      0     11      9      2