TY - GEN
T1 - Quantifying harbour porpoise foraging behaviour in CPOD data
AU - Bergès, B.J.P.
AU - Geelhoed, Steve
AU - Scheidat, Meike
AU - Tougaard, Jakob
N1 - Funding Information:
This study was funded by Rijkswaterstaat through the WOZEP project. The Gemini Windpark operator is thanked for their interest in this project and for providing us with the data set used in our analyses. JT was funded by the Danish Ministry of Environment and Food.
Publisher Copyright:
© 2020 Acoustical Society of America.
PY - 2019/7/7
Y1 - 2019/7/7
N2 - Harbour porpoises (Phocoena phocoena) are regularly monitored to assess how they are impacted by the construction and operation of offshore wind farms. A suitable method to do this is passive acoustic monitoring (PAM) by stationary hydrophones, for example CPODs. These devices provide information on echolocation click activity, which can then be analysed. Prey occurrence is considered one of the main drivers in porpoise distribution and successful feeding is vital to the fitness and survival of individual porpoises. Information on foraging behavior, however, is difficult to obtain in the field, in particular as animals feed under water. Harbour porpoise use narrow band high frequency signals in a sequence of clicks (called click trains) for echolocation, communication and foraging. The different behaviors are characterised by the modulation in time lag between clicks (inter-click interval). Using CPOD data collected in Dutch water during and after pile driving noise exposure, the present study first investigated different data processing methods for the quantification of foraging behavior. The results indicate that: (1) a click-based classification provides the best results (as opposed to using click trains), (2) foraging events could be detected in sufficient numbers to reveal patterns over time, such as correlation with pile driving activities.
AB - Harbour porpoises (Phocoena phocoena) are regularly monitored to assess how they are impacted by the construction and operation of offshore wind farms. A suitable method to do this is passive acoustic monitoring (PAM) by stationary hydrophones, for example CPODs. These devices provide information on echolocation click activity, which can then be analysed. Prey occurrence is considered one of the main drivers in porpoise distribution and successful feeding is vital to the fitness and survival of individual porpoises. Information on foraging behavior, however, is difficult to obtain in the field, in particular as animals feed under water. Harbour porpoise use narrow band high frequency signals in a sequence of clicks (called click trains) for echolocation, communication and foraging. The different behaviors are characterised by the modulation in time lag between clicks (inter-click interval). Using CPOD data collected in Dutch water during and after pile driving noise exposure, the present study first investigated different data processing methods for the quantification of foraging behavior. The results indicate that: (1) a click-based classification provides the best results (as opposed to using click trains), (2) foraging events could be detected in sufficient numbers to reveal patterns over time, such as correlation with pile driving activities.
U2 - 10.1121/2.0001214
DO - 10.1121/2.0001214
M3 - Conference paper
AN - SCOPUS:85132149057
VL - 37
T3 - Proceedings of Meetings on Acoustics
BT - Proceedings of Meetings on Acoustics
PB - Acoustical Society of America
T2 - 5th International Conference on the Effects of Noise on Aquatic Life
Y2 - 7 July 2019 through 12 July 2019
ER -