Publication - Report

Acoustic deterrence using startle sounds: long term effectiveness and effects on odontocetes

Published: 25 Nov 2013
Part of:
Marine and fisheries
ISBN:
9781784120801

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.

46 page PDF

1.2 MB

46 page PDF

1.2 MB

Contents
Acoustic deterrence using startle sounds: long term effectiveness and effects on odontocetes
Appendix 1: Record of seal scarer operation and loudspeaker configuration

46 page PDF

1.2 MB

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


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