Journal
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
Volume 134, Issue 3, Pages 2486-2496Publisher
ACOUSTICAL SOC AMER AMER INST PHYSICS
DOI: 10.1121/1.4816573
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Funding
- U.S. Navy (ONR) [N45]
- U.S. Strategic Environmental Research and Development Program
- U.S. Chief of Naval Operations Submarine Warfare Division
- U.S. National Oceanic and Atmospheric Administration (National Marine Fisheries Service, Office of Science and Technology)
- U.S. National Oceanic and Atmospheric Administration Ocean Acoustics Program
- NMFS's Southwest Fisheries Science Center
- NMFS's Pacific Islands Fisheries Science Center
- M.R. and Evelyn Hudson Foundation
- Wild Whale Research Foundation
- Joint Industry Program on Sound
- National Ocean Partnership Program
- Packard Foundation
- Canary Islands Government
- Spanish Ministries of Defense and Environment
- project LIFE-Indemares
- Cabildo Insular de El Hierro
- Marine Life Program of the International Association of Oil and Gas Producers
- Marie Curie fellowship from the 7th EU Frame Program
- Navy's Southern California Offshore Range
- NERC [NE/J020176/1] Funding Source: UKRI
- Natural Environment Research Council [smru10001, NE/J020176/1] Funding Source: researchfish
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Acoustic survey methods can be used to estimate density and abundance using sounds produced by cetaceans and detected using hydrophones if the probability of detection can be estimated. For passive acoustic surveys, probability of detection at zero horizontal distance from a sensor, commonly called g(0), depends on the temporal patterns of vocalizations. Methods to estimate g(0) are developed based on the assumption that a beaked whale will be detected if it is producing regular echolocation clicks directly under or above a hydrophone. Data from acoustic recording tags placed on two species of beaked whales (Cuvier's beaked whale-Ziphius cavirostris and Blainville's beaked whale-Mesoplodon densirostris) are used to directly estimate the percentage of time they produce echolocation clicks. A model of vocal behavior for these species as a function of their diving behavior is applied to other types of dive data (from time-depth recorders and time-depth-transmitting satellite tags) to indirectly determine g(0) in other locations for low ambient noise conditions. Estimates of g(0) for a single instant in time are 0.28 [standard deviation (s.d.) = 0.05] for Cuvier's beaked whale and 0.19 (s.d. = 0.01) for Blainville's beaked whale.
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