On the performance of automated porpoise-click-detectors in experiments with captive harbor porpoises (Phocoena phocoena).

摘要: Recently, automated porpoise-click-detectors (T-PODs, Chelonia-Marine-Research) have been used intensively in monitoring harbor porpoises (Phocoena phocoena) the wild. However, click-detection-mechanism of T-POD leads to questions on characteristics detection process. We undertook experiments with six captive (four subadult males one pool, two adult another) at Dolfinarium Harderwijk (Netherlands). One was placed for over a week each while behavior logged by visual observation. Data were analyzed using software. A total 725 431 clicks 30 090 trains recorded 32% classified as CET HI, 27% LO, and 41% DOUBTFUL. All three train classes differed significantly all parameters, except click duration. conclude that T-PODs perform generally well detecting but any future study being lower probability should be investigated very carefully avoid risk losing valuable information.