Visual and Passive Acoustic Marine Mammal Observations and High-Frequency Seismic Source Characteristics Recorded During a Seismic Survey

Potter, John R.; Thillet, M.; Douglas, Craig; Chitre, Mandar; Doborzynski, Z.; Seekings, Paul J.

doi:10.1109/joe.2006.880427

Cited by 21 publications

(12 citation statements)

References 4 publications

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“…Real-time detection of cetaceans using passive acoustics is increasingly recognized as a potential tool for the mitigation of human impacts on the marine environment (Barlow & Gisiner 2006, Castellote 2007, Potter et al 2007, Weir & Dolman 2007. The successful 31 Fig.…”

Section: Towed Array Applicationsmentioning

confidence: 99%

Management and research applications of real-time and archival passive acoustic sensors over varying temporal and spatial scales

Parijs¹,

Clark²,

Sousa‐Lima

et al. 2009

Mar. Ecol. Prog. Ser.

290

239

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Section: Towed Array Applicationsmentioning

confidence: 99%

Management and research applications of real-time and archival passive acoustic sensors over varying temporal and spatial scales

Parijs¹,

Clark²,

Sousa‐Lima

et al. 2009

Mar. Ecol. Prog. Ser.

290

239

View full text Add to dashboard Cite

“…However, there is increasing concern over the extent to which expanding oil and gas exploration may affect other cetacean species in both temperate shelf seas [11] and arctic waters [12]. The only information available on behavioural responses of smaller cetaceans that have higher frequency hearing is based on observations from seismic survey vessels [13,14]. Although these observations include reports of aversive behaviour by small cetaceans [15], nothing is known about the spatial scales or longer-term consequences of these responses [1,16].…”

Section: Introductionmentioning

confidence: 99%

Short-term disturbance by a commercial two-dimensional seismic survey does not lead to long-term displacement of harbour porpoises

et al. 2013

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Assessments of the impact of offshore energy developments are constrained because it is not known whether fine-scale behavioural responses to noise lead to broader-scale displacement of protected small cetaceans. We used passive acoustic monitoring and digital aerial surveys to study changes in the occurrence of harbour porpoises across a 2000 km2 study area during a commercial two-dimensional seismic survey in the North Sea. Acoustic and visual data provided evidence of group responses to airgun noise from the 470 cu inch array over ranges of 5–10 km, at received peak-to-peak sound pressure levels of 165–172 dB re 1 µPa and sound exposure levels (SELs) of 145–151 dB re 1 µPa2 s−1. However, animals were typically detected again at affected sites within a few hours, and the level of response declined through the 10 day survey. Overall, acoustic detections decreased significantly during the survey period in the impact area compared with a control area, but this effect was small in relation to natural variation. These results demonstrate that prolonged seismic survey noise did not lead to broader-scale displacement into suboptimal or higher-risk habitats, and suggest that impact assessments should focus on sublethal effects resulting from changes in foraging performance of animals within affected sites.

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“…We therefore limit our discussion to the few studies reporting on the reactions of baleen whales to airgun pulses. Most of these studies are based on data collected during aerial surveys or vessel-based observations, and report on behavioral effects such as avoidance, changes in diving pattern and respiration, or changes in sighting rates (e.g., Malme et al 1984, Richardson et al 1986, McCauley et al 1998, Stone and Tasker 2006, Gailey et al 2007, Potter et al 2007, Weir 2008.…”

Section: Discussionmentioning

confidence: 99%

Effects of airgun sounds on bowhead whale calling rates in the Alaskan Beaufort Sea

Blackwell¹,

Nations

McDonald

et al. 2013

Marine Mammal Science

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This study assesses effects of airgun sounds on bowhead calling behavior during the autumn migration. In August-October 2007, 35 directional acoustic recorders (DASARs) were deployed at five sites in the Alaskan Beaufort Sea. Location estimates were obtained for >137,500 individual calls; a subsample of locations with high detection probability was used in the analyses. Call localization rates (CLRs) were compared before, during, and after periods of airgun use between sites near seismic activities (median distance 41-45 km) and sites relatively distant from seismic activities (median distance >104 km). At the onset of airgun use, CLRs dropped significantly at sites near the airguns, where median received levels from airgun pulses (SPL) were 116-129 dB re 1 lPa (10-450 Hz). CLRs remained unchanged at sites distant from the airguns, where median received levels were 99-108 dB re 1 lPa. This drop could result from a cessation of calling, deflection of whales around seismic activities, or both combined, but call locations alone were insufficient to differentiate between these possibilities. Reverberation from airgun pulses could have masked a small number of calls near the airguns, but even if masking did take place, the analysis results remain unchanged.

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Visual and Passive Acoustic Marine Mammal Observations and High-Frequency Seismic Source Characteristics Recorded During a Seismic Survey

Cited by 21 publications

References 4 publications

Management and research applications of real-time and archival passive acoustic sensors over varying temporal and spatial scales

Management and research applications of real-time and archival passive acoustic sensors over varying temporal and spatial scales

Short-term disturbance by a commercial two-dimensional seismic survey does not lead to long-term displacement of harbour porpoises

Effects of airgun sounds on bowhead whale calling rates in the Alaskan Beaufort Sea

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