Searched for: +
(1 - 8 of 8)
document
von Benda-Beckmann, A.M. (author), Wensveen, P.J. (author), Kvadsheim, P.H. (author), Lam, F.P.A. (author), Miller, P.J.O. (author), Tyack, P.L. (author), Ainslie, M.A. (author)
Ramp-up or soft-start procedures (i.e., gradual increase in the source level) are used to mitigate the effect of sonar sound on marine mammals, although no one to date has tested whether ramp-up procedures are effective at reducing the effect of sound on marine mammals. We investigated the effectiveness of ramp-up procedures in reducing the area...
article 2013
document
Wensveen, P.J. (author), von Benda-Beckmann, A.M. (author), Ainslie, M.A. (author), Lam, F.P.A. (author), Kvadsheim, P.H. (author), Tyack, P.L. (author), Miller, P.J.O. (author)
The behaviour of a marine mammal near a noise source can modulate the sound exposure it receives.We demonstrate that two long-finned pilot whales both surfaced in synchrony with consecutive arrivals of multiple sonar pulses. We then assess the effect of surfacing and other behavioural response strategies on the received cumulative sound exposure...
article 2015
document
von Benda-Beckmann, A.M. (author), Aarts, G. (author), Sertlek, H.O. (author), Lucke, K. (author), Verboom, W.C. (author), Kastelein, R.A. (author), Ketten, D.R. (author), van Bemmelen, R. (author), Lam, F.P.A. (author), Kirkwood, R. (author), Ainslie, M.A. (author)
(UXO) are still present in the North Sea. UXO are frequently accidentally encountered by fishermen and dredging vessels. Out of concern for human safety and to avoid damage to equipment and infrastructure from uncontrolled explosions, most reported UXO found in the Dutch Continental Shelf (DCS) are detonated in a controlled way. These underwater...
article 2015
document
von Benda-Beckmann, A.M. (author), Wensveen, P.J. (author), Prior, M. (author), Ainslie, M.A. (author), Hansen, R.R. (author), Isojunno, S. (author), Lam, F.P.A. (author), Kvadsheim, P.H. (author), Miller, P.J.O. (author)
To understand the consequences of underwater noise exposure for cetaceans, there is a need for assessments of behavioural responses over increased spatial and temporal scales. Bottom-moored acoustic recorders and satellite tags provide such long-term and large spatial coverage of behaviour compared to short-duration acoustic-recording tags....
article 2019
document
von Benda-Beckmann, A.M. (author), Lam, F.P.A. (author), Moretti, D.J. (author), Fulkerson, K. (author), Ainslie, M.A. (author), van IJsselmuide, S.P. (author), Theriault, J. (author), Beerens, S.P. (author), TNO Defensie en Veiligheid (author)
The detection performance of a towed hydrophone array for deep-diving species is quantified by comparing detections of echolocation clicks from foraging groups of Blainville’s beaked whales (Mesoplodon densirostris) from the TNO Delphinus array to detections from bottom-mounted hydrophones at the Atlantic Undersea Test and Evaluation Center ...
article 2010
document
Miller, P.J.O. (author), Antunes, R.N. (author), Wensveen, P.J. (author), Samarra, F.I.P. (author), Alves, A.C. (author), Tyack, P.L. (author), Kvadsheim, P.H. (author), Kleivane, L. (author), Lam, F.P.A. (author), Ainslie, M.A. (author), Thomas, L. (author)
Eight experimentally controlled exposures to 1−2 kHz or 6−7 kHz sonar signals were conducted with four killer whale groups. The source level and proximity of the source were increased during each exposure in order to reveal response thresholds. Detailed inspection of movements during each exposure session revealed sustained changes in speed and...
article 2014
document
Sivle, L.D. (author), Kvadsheim, P.H. (author), Ainslie, M.A. (author), Solow, A. (author), Handegard, N.O. (author), Miller, P.J.O. (author), Nordlund, N. (author), Lam, F.P.A. (author)
Naval anti-submarine sonars produce intense sounds within the hearing range of Atlantic herring (Clupea harengus). In this study, schools of Atlantic herring were exposed to sonar signals of 1–2 kHz (low-frequency active sonar, LFAS) and 6–7 kHz (mid-frequency active sonar, MFAS) and playbacks of killer whale feeding sounds during their summer...
article 2012
document
Kastelein, R.A. (author), Helder-Hoek, L. (author), van de Voorde, S. (author), von Von Benda-Beckmann, A.M. (author), Lam, F.P.A. (author), Jansen, E. (author), de Jong, C.A.F. (author), Ainslie, M.A. (author)
In seismic surveys, reflected sounds from airguns are used under water to detect gas and oil below the sea floor. The airguns produce broadband high-amplitude impulsive sounds, which may cause temporary or permanent threshold shifts (TTS or PTS) in cetaceans. The magnitude of the threshold shifts and the hearing frequencies at which they occur...
article 2017
Searched for: +
(1 - 8 of 8)