Opin vísindi

When the noise goes on: received sound energy predicts sperm whale responses to both intermittent and continuous navy sonar

When the noise goes on: received sound energy predicts sperm whale responses to both intermittent and continuous navy sonar


Titill: When the noise goes on: received sound energy predicts sperm whale responses to both intermittent and continuous navy sonar
Höfundur: Isojunno, Saana
Wensveen, Paul   orcid.org/0000-0002-9894-2543
Lam, Frans-Peter A.
Kvadsheim, Petter H.
von Benda-Beckmann, Alexander M.
Martín López, Lucía M.
Kleivane, Lars
Siegal, Eilidh M.
Miller, Patrick J. O.
Útgáfa: 2020-02-27
Tungumál: Enska
Umfang: jeb219741
Háskóli/Stofnun: Háskóli Íslands
University of Iceland
Svið: Verkfræði- og náttúruvísindasvið (HÍ)
School of Engineering and Natural Sciences (UI)
Deild: Líf- og umhverfisvísindadeild (HÍ)
Faculty of Life and Environmental Sciences (UI)
Birtist í: The Journal of Experimental Biology;223(7)
ISSN: 0022-0949
1477-9145 (eISSN)
DOI: 10.1242/jeb.219741
Efnisorð: Anthropogenic noise; Continuous active sonar; DTAG; Intermittent sound; Time budget; Time-series model; Búrhvalur; Hvalir; Hljóð
URI: https://hdl.handle.net/20.500.11815/2387

Skoða fulla færslu

Tilvitnun:

Isojunno, S., Wensveen, P.J., Lam, F.-P.A., Kvadsheim, P.H., Von Benda-Beckmann, A.M., Martín López, L.M., Kleivane, L., Siegal, E.M., Miller, P.J.O., 2020. When the noise goes on: received sound energy predicts sperm whale responses to both intermittent and continuous navy sonar. The Journal of Experimental Biology 223, jeb219741. doi:10.1242/jeb.219741

Útdráttur:

Anthropogenic noise sources range from intermittent to continuous, with seismic and navy sonar technology moving towards nearcontinuous transmissions. Continuous active sonar (CAS) may be used at a lower amplitude than traditional pulsed active sonar (PAS), but potentially with greater cumulative sound energy. We conducted at-sea experiments to contrast the effects of navy PAS versus CAS on sperm whale behaviour using animal-attached sound- and movement-recording tags (n=16 individuals) in Norway. Changes in foraging effort and proxies for foraging success and cost during sonar and control exposures were assessed while accounting for baseline variation [individual effects, time of day, bathymetry and blackfish ( pilot/killer whale) presence] in generalized additive mixed models (GAMMs). We found no reduction in time spent foraging during exposures to medium-level PAS (MPAS) transmitted at the same peak amplitude as CAS. In contrast, we found similar reductions in foraging during CAS (d.f.=1, F=8.0, P=0.005) and higher amplitude PAS (d.f.=1, F=20.8, P<0.001) when received at similar energy levels integrated over signal duration. These results provide clear support for sound energy over amplitude as the response driver. We discuss the importance of exposure context and the need to measure cumulative sound energy to account for intermittent versus more continuous sources in noise impact assessments.

Athugasemdir:

Publisher's version (útgefin grein)

Leyfi:

This is an Open Access article distributed under the terms of the Creative Commons AttributionLicense (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use,distribution and reproduction in any medium provided that the original work is properly attributed.

Skrár

Þetta verk birtist í eftirfarandi safni/söfnum: