Fish Biological Response Data

This is the fish biological response data.

Fish group 1: 8/1/2003 13:57 through 8/7/2003 8:42
Fish group 2: 8/8/2003 17:47 through 8/22/2003 10:43
Fish group 3: 8/22/2003 14:15 through 9/5/2003 9:49
Fish group 4: 9/5/2003 13:21 through 9/11/2003 15:36

No fish mortality occurred during monitoring period from 8/1/2003 through 9/11/2003. Seven alarm events occurred during the monitoring period (see charts below).

Click on the graphs below to enlarge.

Hydrological data
Fish Response Data

Events 1 through 4 (8/9/2003 20:02 to 8/10/2003 2:32, 8/11/2003 5:47 to 8/11/2003 6:32, 8/13/2003 18:32 to 8/13/2003 21:02, 8/16/2003 18:40 to 8/16/2003 18:55): Alarm events were caused by increased average depth which resulted from decreasing conductivity/salinity when compared to baseline values. Baseline period had elevated conductivity (> 4 mS/cm) levels when compared to field monitoring period (< 1 mS/cm) when events 1-4 occurred. Conversely average depth was lower during the baseline period when compared to the field monitoring period.

Event 5 (8/27/2003 11:06 to 8/27/2003 13:54): Alarm event was caused primarily by increased ventilatory rate and cough rate. Water quality (temp, DO, pH, and conductivity) does not appear to be dramatically different than periods prior to the alarm event. The alarm event was at the beginning of a conductivity increase from 1 to 10 mS/cm which was over a one week period. In addition, the temperature reached a new high of 31.84 oC after the alarm event and remained high leading to multiple events at this time.

Event 6 through 7: (9/4/2003 12:04 to 9/4/2003 13:34, 9/5/2003 2:04 to 9/5/2003 8:04): Alarm events were caused primarily by increased ventilatory rate and cough rate. The alarm events were at the end of a conductivity increase from 1 to 10 mS/cm which was over the prior one week period. During event 7 the Dissolved Oxygen fell below 3 mg/L which automatically turned on the back up aeration and prevented the fish from being killed as designed. In addition, the events were at the beginning of a steady temperature drop from 31.01 to 22.73 oC which occurred over the following week.

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