Photo-acoustic automated surveillance of fauna

As part of its SABIO project (SCALED ACOUSTIC BIODIVERSITY) Dyni team of CNRS UMR LSIS (University of Toulon) installs his 24h/24h acoustic monitoring system in wildlife remarkable sites of Port-Cros national park. This rapid acoustic detection device allows, after a few minutes, to reveal in a large database (several days of recording) the minutes of greatest interest, to automatically identify animal species and noisy anthropogenic disturbances, and finally to show the corresponding pictures among thousands of shots.

Example of a acoustic and photographic surveillance session of 3 days in a remarkably preserved ecosystem on the island of Port-Cros: Recording 24h/24, 1 photograph every 12 sec.

Stard date:20 04 2012
End date:23 04 2012Session duration71h04min
Start time:12h43m00s
End time:11h47m00s
Site:ile de Port-Cros, Var, France (carte)
Size of 1 audio recording5min/28.8 MBTotal number of audio recordings720
Size of 1 photograph154 KBTotal number of photographs11933

Conservation status of species emanate from french committee of the International Union for Conservation of Nature:

CR=Critically endangered,
NT=Near Threatened,
LC=Least Concerned,
DD/NA=Data Deficient or Not applicable
Date_timeSpeciesAcoustic detectionPhotographic detectionIUCN StatusDistance to sound source
22042012_123007Buzzard (flight)LISTEN TOCR12m
22042012_022509Scops owlLISTEN TO(no photo during night)EN-
21042012_093247Wild catLISTEN TOVU6m
21042012_113415Grass snake(silent animal)NT6m
21042012_074733Common NightingaleLISTEN TO(out of photographic reach)LC-
21042012_083421Rabbit(silent animal)LC10m
21042012_154123Common Wood-pigeon(silent animal) DD/DA5m
20120422_123231PouillotLISTEN TO(out of photographic reach)DD/DA-
20120422_123231Pinson des arbresLISTEN TO(out of photographic reach)DD/DA-
20120422_072154bumblebeeLISTEN TO(out of photographic reach)DD/DA-
20120422_074321bumblebeeLISTEN TO(out of photographic reach)DD/DA-
20120422_085235Yellow-legged GullLISTEN TO(out of photographic reach)DD/DA-
20120422_085357Eurasian Chaffinch (contact cry)LISTEN TO(out of photographic reach)DD/DA-
20120422_092249Common Wood-pigeon (flight)LISTEN TO(out of photographic reach)DD/DA-
20120421_095202Jet planeLISTEN TO(out of photographic reach)DD/DA-
20120421_102316Common Wood-pigeon (flight)LISTEN TO(out of photographic reach)DD/DA-
20120421_102317Eurasian Chaffinch (rain cry)LISTEN TO(out of photographic reach)DD/DA-
20120421_105330Eurasian Chaffinch (song)LISTEN TO(out of photographic reach)DD/DA-
20120422_123231Blackcap (alarm call)LISTEN TO(out of photographic reach)DD/DA-

Technical principe :

Ambient noise in a (eco) system corresponds to an energy roughly constant.

When an animal produces a sound (song, cry, fly, walk), the energy level rises sharply and then returns to its normal level. It is this energy change, its date and duratin that the algorithms detect and record.

The registration station can be equipped with a camera in regular shoot mode.
In this case, for each acoustic detection, time corresponding photograph is contacted to observe animal(s).

Applications :

In the terrestrial environment:
-Protection of the civilian and / or military planes by automated detection of birds in the airspace
-Automated discovery of species to classify an area as Natura 2000 zone
-Conduct wildlife monitoring protocols (eg National Parks) to lower cost and sampling effort constant from one year to another
-Automated discovery of inaudible animals to the human ear (bats, moths, shrews ...)
-Automated discovery of large mammals (Bisons, Przewalski horses ...)
-Ecological diagnostics of green natural spaces at large or small scale, high or low resolution (inventory and quantification of species)
-Automatic detection and study of ecology of big predators (eg Wolf ...)
-Monitoring the quality of urban and peri-urban environments

In the Marine Environment:
- Ecological synthesis of cetaceans (whales and dolphins) bioacoustic data analysis for Port-Cros national park

Hervé Glotin (Institut Universitaire de France)glotin@univ-tln.fr
Jean-Marc Prévot (operating and acquisition linux systems)jean-marc.prevot@univ-tln.fr