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Estimating minke whale (Balaenoptera acutorostrata) boing sound density using passive acoustic sensors

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https://ir.library.oregonstate.edu/concern/articles/cv43nx40r

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  • Density estimation for marine mammal species is performed primarily using visual distance sampling or capture-recapture. Minke whales in Hawaiian waters are very difficult to sight; however, they produce a distinctive “boing” call, making them ideal candidates for passive acoustic density estimation. We used an array of 14 bottom-mounted hydrophones, distributed over a 60 × 30 km area off Kauai, Hawaii, to estimate density during 12 d of recordings in early 2006.We converted the number of acoustic cues (i.e., boings) detected using signal processing software into a cue density by accounting for the false positive rate and probability of detection. The former was estimated by manual validation, the latter by applying spatially explicit capture-recapture (SECR) methods to a subset of data where we had determined which hydrophones detected each call. Estimated boing density was 130 boings per hour per 10,000 km² (95% CI 104–163). Little is known about the population’s acoustic behavior, so conversion from boing to animal density is difficult. As a demonstration of the method, we used a tentative boing rate of 6.04 boings per hour, from a single animal tracked in 2009, to give an estimate of 21.5 boing-calling minke whales per 10,000 km².
  • Keywords: Cue count, Boing vocalization, Spatially explicit capture-recapture, Passive acoustic density estimation, Passive acoustic monitoring
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  • Martin, S. W., Marques, T. A., Thomas, L., Morrissey, R. P., Jarvis, S., DiMarzio, N., . . . Mellinger, D. K. (2013). Estimating minke whale (balaenoptera acutorostrata) boing sound density using passive acoustic sensors. Marine Mammal Science, 29(1), 142-158. doi:10.1111/j.1748-7692.2011.00561.x
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  • 29
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  • This work is an output of the National Oceanographic Partnership Program sponsored project Density Estimation of Cetaceans from passive Acoustic Fixed sensors (DECAF), funded jointly by the Joint Industry Program of the International Association of Oil and Gas Producers and the US National Marine Fisheries Service. TAM’s research partially sponsored by national funds through the Fundação Nacional para a Ciˆencia e a Tecnologia (FCT), Portugal, under the project PEst-OE/MAT/UI0006/2011.
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