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Improving the Navys Passive Underwater Acoustic Monitoring of Marine Mammal Populations

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Technical Report

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University of California San Diego San Diego United States

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The specific objectives of this project have been 1 to further develop the methods for accurately estimating the densities of low-frequency-calling marine mammal species using passive acoustic monitoring, with application to obtaining density estimates of transiting humpback whale populations in the Southern California SoCal Bight, 2 to incorporate detection theory formalism into the acoustic density estimation procedure in order to minimize the variance of the density estimates, 3 to apply the numerical modeling methods for humpback whale vocalizations to understand distortions caused by propagation of humpback calls west of Kauai, Hawaii, and 4 to conduct spatial statistical analyses and correlation analyses of marine mammal and other bioacoustic sounds in the SoCal Bight with man-made underwater sounds, with physical properties of the environment, and with fields relevant to the biological productivity of the water column. The work in this project has been heavily leveraged with other ongoing programs and efforts, as discussed in Related Projects below.

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