title: Review of Low-Level Bioacoustic Behavior in Wild Cetaceans: Conservation Implications of Possible Sleeping Behavior.
abstract: Shallow, low-activity, low-biosonar parabolic-shaped dives were observed in biologging data from tagged harbor porpoises in Danish waters and identified as potential sleeping behavior. This behavioral state merits consideration in assessing the context for noise exposure and passive acoustic monitoring studies. Similar dives have also been reported for other cetacean species. The existence of low-level bioacoustic dives that may represent that sleeping has implications for the mitigation of not only noise exposure but also of bycatch as well as legal repercussions given the protected status of sleeping, as a part of resting, under many legislative regimes.
authors.affiliation: Department of Environmental Science and Policy, George Mason University, Fairfax, VA, 22030, USA. marinebrit@gmail.com.|Department of Bioscience, Aarhus University, DK-4000, Roskilde, Denmark. marinebrit@gmail.com.
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Wright
authors.affiliation: National Research Institute of Fisheries Engineering, Fisheries Research Agency, Kamisu, Hasaki, Kashima, Ibaraki, 314-0408, Japan. akamatsu@affrc.go.jp.
authors.forename: Tomonari
authors.initials: T
authors.lastname: Akamatsu
authors.affiliation: Department for Bioscience, Aarhus University, DK-8000, Aarhus, Denmark. kim.mouritsen@biology.au.dk.
authors.forename: Kim Nørgaard
authors.initials: KN
authors.lastname: Mouritsen
authors.affiliation: Department of Bioscience, Aarhus University, DK-4000, Roskilde, Denmark. sign@dmu.dk.
authors.forename: Signe
authors.initials: S
authors.lastname: Sveegaard
authors.affiliation: Department of Bioscience, Aarhus University, DK-4000, Roskilde, Denmark. rdi@dmu.dk.
authors.forename: Rune
authors.initials: R
authors.lastname: Dietz
authors.affiliation: Department of Bioscience, Aarhus University, DK-4000, Roskilde, Denmark. jte@dmu.dk.
authors.forename: Jonas
authors.initials: J
authors.lastname: Teilmann
mesh_terms: D000162:Acoustics; D000818:Animals; D001522:Behavior, Animal / Q000502:physiology*; D002591:Cetacea / Q000502:physiology*; D003247:Conservation of Natural Resources; D004781:Environmental Exposure; D008962:Models, Theoretical; D012890:Sleep / Q000502:physiology*
keywords: Bycatch; Context; Noise exposure; Passive acoustic monitoring; Response