TY - JOUR
TI - Harbour porpoise (Phocoena phocoena) static acoustic monitoring: laboratory detection thresholds of T-PODs are reflected in field sensitivity
AU - Kyhn, L
AU - Tougaard, J
AU - Teilmann, J
AU - Wahlberg, M
AU - Jorgensen, P
AU - Bech, N
T2 - Journal of the Marine Biological Association of the United Kingdo
AB - The T-POD (Timing POrpoise Detector) is a self-contained acoustic data logger used for detecting and monitoring the presence of echolocation clicks of small cetaceans. It has become a standard tool in environmental impact assessments and monitoring programmes. Yet, little is known about the variability in sensitivity and detection range of T-PODs. In this study the field performance of ten v3 T-PODs was compared to detection thresholds measured in a tank. The T-POD thresholds ranged from 123 to 132 dB re 1μPa (pp). The detection thresholds of the ten individual T-PODs were different and the differences increased over time. The more sensitive a T-POD was in the laboratory (i.e. the lower the threshold) the more clicks were recorded by it in the field. Threshold correlated differently to the five analysed T-POD parameters (encounters, encounter duration, waiting time, porpoise positive minutes, clicks per porpoise positive minute). This study demonstrates that individual threshold calibrations of T-PODs are necessary to obtain comparable results when monitoring odontocetes with this tool. Regression equations for relationships between T-POD detection thresholds and study parameters obtained during field trials may allow comparisons of T-PODs with different detection thresholds.
DA - 2008/09//
PY - 2008
VL - 88
IS - 6
SP - 1085
EP - 1091
UR - https://www.cambridge.org/core/journals/journal-of-the-marine-biological-association-of-the-united-kingdom/article/harbour-porpoise-phocoena-phocoena-static-acoustic-monitoring-laboratory-detection-thresholds-of-tpods-are-reflected-in-field-sensitivity/7E584FF4EB143284C438831D6B320468
DO - 10.1017/S0025315408000416
LA - English
KW - Marine Mammals
KW - Cetaceans
ER -