| acoustically invisible feeding blue whales in northern icelandic waters. | fixed passive acoustic monitoring can be used for long-term recording of vocalizing cetaceans. both presence monitoring and animal density estimation requires the call rates and sound source levels of vocalizations produced by single animals. in this study, blue whale calls were recorded using acoustic bio-logging systems in skjálfandi bay off húsavík, northeast iceland, in june 2012. an accelerometer was attached to individual whales to monitor diving behavior. during 21 h recording two individ ... | 2014 | 25096128 |