title: Acoustic detection of biosonar activity of deep diving odontocetes at Josephine Seamount High Seas Marine Protected Area.
abstract: The temporal occurrence of deep diving cetaceans in the Josephine Seamount High Seas Marine Protected Area (JSHSMPA), south-west Portugal, was monitored using a passive acoustic recorder. The recorder was deployed on 13 May 2010 at a depth of 814 m during the North Atlantic Treaty Organization Centre for Maritime Research and Experimentation cruise "Sirena10" and recovered on 6 June 2010. The recorder was programmed to record 40 s of data every 2 min. Acoustic data analysis, for the detection and classification of echolocation clicks, was performed using automatic detector/classification systems: M3R (Marine Mammal Monitoring on Navy Ranges), a custom matlab program, and an operator-supervised custom matlab program to assess the classification performance of the detector/classification systems. M3R CS-SVM algorithm contains templates to detect beaked whales, sperm whales, blackfish (pilot and false killer whales), and Risso's dolphins. The detections of each group of odontocetes was monitored as a function of time. Blackfish and Risso's dolphins were detected every day, while beaked whales and sperm whales were detected almost every day. The hourly distribution of detections reveals that blackfish and Risso's dolphins were more active at night, while beaked whales and sperm whales were more active during daylight hours.
authors.affiliation: Department of Oceanography, University of Hawaii, 1000 Pope Road, Honolulu, Hawaii 96822, USA.
authors.forename: Giacomo
authors.initials: G
authors.lastname: Giorli
authors.affiliation: Hawaii Institute of Marine Biology, University of Hawaii, P.O. Box 1106, Kaneohe, Hawaii 96734, USA.
authors.forename: Whitlow W L
authors.initials: WW
authors.lastname: Au
authors.affiliation: Hawaii Institute of Marine Biology, University of Hawaii, P.O. Box 1106, Kaneohe, Hawaii 96734, USA.
authors.forename: Hui
authors.initials: H
authors.lastname: Ou
authors.affiliation: Naval Undersea Warfare Center, 1176 Howell Street, Newport, Rhode Island 02841, USA.
authors.forename: Susan
authors.initials: S
authors.lastname: Jarvis
authors.affiliation: Naval Undersea Warfare Center, 1176 Howell Street, Newport, Rhode Island 02841, USA.
authors.forename: Ronald
authors.initials: R
authors.lastname: Morrissey
authors.affiliation: Naval Undersea Warfare Center, 1176 Howell Street, Newport, Rhode Island 02841, USA.
authors.forename: David
authors.initials: D
authors.lastname: Moretti
mesh_terms: D000162:Acoustics; D000465:Algorithms; D000818:Animals; D001267:Atlantic Ocean; D002591:Cetacea / Q000145:classification* / Q000502:physiology*; D002940:Circadian Rhythm; D004455:Echolocation / Q000145:classification*; D004784:Environmental Monitoring / Q000379:methods*; D009038:Motion; D012815:Signal Processing, Computer-Assisted; D013016:Sound; D013018:Sound Spectrography; D013045:Species Specificity; D013997:Time Factors; D014828:Vocalization, Animal / Q000145:classification*