Now showing items 1-6 of 6

  • Beaked whales respond to simulated and actual navy sonar 

    Tyack, Peter L.; Zimmer, Walter M. X.; Moretti, David; Southall, Brandon L.; Claridge, Diane E.; Durban, John W.; Clark, Christopher W.; D'Amico, Angela; DiMarzio, Nancy; Jarvis, Susan; McCarthy, Elena; Morrissey, Ronald; Ward, Jessica; Boyd, Ian L. (2011-03-14) - Journal article
    Beaked whales have mass stranded during some naval sonar exercises, but the cause is unknown. They are difficult to sight but can reliably be detected by listening for echolocation clicks produced during deep foraging ...
  • Biosonar performance of foraging beaked whales (Mesoplodon densirostris) 

    Madsen, P T; Johnson, M; de Soto, N A; Zimmer, W M X; Tyack, P (2005-01-15) - Journal article
    Toothed whales (Cetacea, odontoceti) emit sound pulses to probe their surroundings by active echolocation. Noninvasive, acoustic Dtags were placed on deep-diving Blainville's beaked whales (Mesoplodon densirostris) to ...
  • Clicking in Shallow Rivers : Short-Range Echolocation of Irrawaddy and Ganges River Dolphins in a Shallow, Acoustically Complex Habitat 

    Jensen, Frants; Rocco, Alice; Mansur, Rubaiyat; Smith, Brian; Janik, Vincent M.; Madsen, Peter (2013-04-03) - Journal article
    Toothed whales (Cetacea, odontoceti) use biosonar to navigate their environment and to find and catch prey. All studied toothed whale species have evolved highly directional, high-amplitude ultrasonic clicks suited for ...
  • Echolocation : clicking for supper 

    Tyack, Peter Lloyd (2015-04-29) - Journal article
    When close to prey, porpoises actively widen their sonar beam, which may make it harder for the prey to escape.
  • Following a foraging fish-finder : Diel habitat use of Blainville's beaked whales revealed by echolocation 

    Arranz, Patricia; Aguilar de Soto, Natacha; Madsen, Peter T.; Brito, Alberto; Bordes, Fernando; Johnson, Mark P. (2011-12-07) - Journal article
    Simultaneous high resolution sampling of predator behavior and habitat characteristics is often difficult to achieve despite its importance in understanding the foraging decisions and habitat use of predators. Here we tap ...
  • Ultrasonic monitoring to assess the impacts of forest conversion on Solomon Island bats 

    Davies, Tamara Ellen; Ruzicka, Filip; Lavery, Tyrone; Walters, Charlotte L; Pettorelli, Nathalie (2016-06) - Journal article
    Paleotropical islands are experiencing extensive land-use change, yet little is known about how such changes are impacting wildlife in these biodiversity hotspots. To address this knowledge gap, we characterized bat responses ...