Acoustic deterrence using startle sounds: long term effectiveness and effects on odontocetes
This report presents the findings of field experiments aimed as testing the long-term effectiveness of a new deterrence method (acoustic startle reflex)on pinnipeds.
Appendix 1: Record of seal scarer operation and loudspeaker configuration
| Date (change of state) |
Transducers deployed |
Transducers operating |
Reason for failure/notes |
|---|---|---|---|
| 16.1.2011 |
5, 6 |
5,6 |
Installed and running |
| 31.1.2011 |
5,6 |
none |
power supply failure |
| 4.2.2011 |
1,2,3,4 |
1,2,3,4 (low source level) |
repair job interrupted by storm |
| 7.2.2011 |
1,2,3,4 |
none |
battery drained, power supply issue still not resolved |
| 14.2. 2011 |
1,2,3,4 |
1,2,3,4 |
|
| 23.2. 2011 |
1,2,3,4 |
none |
power supply failed again |
| 25.2.2011 |
1,2,3,4 |
1,2,3,4 (2 (transducers firing synchronously) |
power amplifier broke down |
| 8.3.2011 |
1,2,3,4 |
1,2,3,4 (transducers firing pseudo-randomly) |
new power amplifier installed |
| 12.5.2011 |
1,2,6 |
1,2,6 |
one transducer removed for "rapid response trial" at Ardmaddy fish farm |
| 10.7.2011 |
1,2,6 |
1,2,6 |
cable of transducer 1 was cut accidentally by fish farm staff; transducer not operating for previous 2 weeks |
| 16.7.2011 |
1,2,6 |
none (on intermittently) |
battery drained, generator running only during the day, top net came down (high morts in cage 6) |
| 26.7. |
1,2,6 |
1,2,6 |
battery re-charged |
| 3.8.2011 |
1,2,6 |
1,2,6 |
cable of transducer 1 was found cut again and repaired |
| 30.8.2011 |
1,2,6 |
none |
battery drained, charger not strong enough |
| 31.08.2011 |
1,2,6 |
1,2,6 |
battery re-charged |
| 8.9.2011 |
1,2,6 |
none |
battery drained, charger not strong enough |
| 9.9.2011 |
1,2,6 |
1,2,6 |
battery recharged |
| 11.09.2011 |
1,2,6 |
none |
battery drained |
| 15.09.2011 |
1,2,6 |
1,2,6 |
battery recharged |
| Nov |
1,2,6 |
1,2 |
one power-amplifier broke down |
| 15.11.2011 |
1,2,6 |
2,6 |
transducers re-wired |
| 16.12.2011 |
1,2,6 |
1,2,6 |
new power-amplifier installed |