Search Results - "air gun"
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Behavioral responses of humpback whales to seismic air guns
Published 2013“…A study of the response of humpback whales to seismic air guns is being conducted in Australian waters and two of four major experiments have been completed. …”
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Impact of air gun noise on the behaviour of marine fish and squid
Published 2012“…Behavioural observations of the fish and squid were made before, during and after air gun noise exposure. Results indicate that as air gun noise levels increase, fish respond by moving to the bottom of the water column and swimming faster in more tightly cohesive groups. …”
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Transmission of marine seismic survey, air gun array signals in Australian waters
Published 2016“…The measured transmission loss showed: high variability of received signal sound exposure level at similar ranges when comparing all surveys (mean of standard deviation across ranges of 3-12 dB); high variability within a seismic survey (mean of standard deviation at any range of 2-4 dB); typical shot-shot variability of 1-3 dB (mean of standard deviation at any range) possibly produced by gun strings moving around; the importance of bathymetry profiles, seabed types and sound speed profiles in determining air gun transmission; different transmission regimes for open ocean, continental shelf and shelf-slope environments; seismic source energy transmitted at longer ranges ( < 1 km) was most commonly dominated by low frequency ( < 500 Hz) energy and only at short range ( > 1 km) was high frequency energy observed; and that a considerable amount of air gun array energy may directly excite the seabed, couple into the seabed and travel horizontally, or by way of interface waves. …”
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Seismic air guns damage rock lobster mechanosensory organs and impair righting reflex
Published 2019“…These results indicate that exposure to air gun signals caused morphological damage to the statocyst of rock lobsters, which can in turn impair complex reflexes. …”
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Widely used marine seismic survey air gun operations negatively impact zooplankton
Published 2017“…Although no adult krill were present, all larval krill were killed after air gun passage. There is a significant and unacknowledged potential for ocean ecosystem function and productivity to be negatively impacted by present seismic technology.…”
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A behavioural dose-response model for migrating humpback whales and seismic air gun noise
Published 2018“…© 2018 The behavioural responses of migrating humpback whales to an air gun, a small clustered seismic array and a commercial array were used to develop a dose-response model, accounting for the presence of the vessel, array towpath relative to the migration and social and environmental parameters. …”
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Determining the behavioural dose-response relationship of marine mammals to air gun noise and source proximity
Published 2017“…This study used the behavioural response of humpback whales to n oise from two different air gun arrays (20 and 140 cubic inch air gun array) to determine whether a dose-response relationship existed. …”
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A lack of correlation between air gun signal pressure waveforms and fish hearing damage
Published 2012“…Although the signal produced by a single air gun is largely omnidirectional at low frequencies (typically, most energy over 10–150 Hz), the signal received by a spatial array of individual air guns is highly directional and dependent on the array configuration and receiver orientation.…”
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The Behavioural Response of Humpback Whales (Megaptera novaeangliae) to a 20 Cubic Inch Air Gun
Published 2015“…In total, there were 18 control trials (where the source vessel ran the compressor and towed the air gun without it firing; n = 35 whale groups) and 16 active trials (where the air gun was firing every 11 s; n = 32 whale groups). …”
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Exposure to seismic air gun signals causes physiological harm and alters behavior in the scallop Pecten fumatus
Published 2017“…We postulate that the observed impacts resulted from high seabed ground accelerations driven by the air gun signal. Given the scope of physiological disruption, we conclude that seismic exposure can harm scallops.…”
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The impact of seismic air gun exposure on the haemolymph physiology and nutritional condition of spiny lobster, Jasus edwardsii
Published 2017“…There is a critical knowledge gap regarding the impacts of seismic air gun signals on the physiology of adult crustaceans. …”
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Development of a model to assess masking potential for marine mammals by the use of air guns in Antarctic waters
Published 2016“…© Springer Science+Business Media New York 2016.We estimated the long-range effects of air gun array noise on marine mammal communication ranges in the Southern Ocean. …”
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Ships and air guns reduce social interactions in humpback whales at greater ranges than other behavioral impacts
Published 2020“…Here, the response of migrating humpback whales to vessels towing seismic air gun arrays (on or off) was quantified as a reduction in their likelihood of socially interacting (joining together). …”
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Modeling cumulative sound exposure over large areas, multiple sources, and long durations
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Marine seismic surveys: analysis and propagation of air-gun signals; and effects of exposure on humpback whales, sea turtles, fishes and squid.
Published 2003“…The program: characterised air-gun signal measurements; modelled air-gun array sources and horizontal air-gun signal propagation; developed an 'exposure model' to predict the scale of potential biological effects for a given seismic survey over its duration; made observations of humpback whales traversing a 3D seismic survey; carried out experiments of approaching humpback whales with a single operating air-gun; carried out trials with an air-gun approaching a cage containing sea turtles, fishes or squid; and modelled the response of fish hearing systems to air-gun signals. …”
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Seismic air gun exposure during early-stage embryonic development does not negatively affect spiny lobster Jasus edwardsii larvae (Decapoda:Palinuridae)
Published 2016“…These surveys are conducted using air guns, which release compressed air to create intense sound impulses, which are repeated around every 8-12 seconds and can travel large distances in the water column. …”
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Marine seismic surveys - A study of environmental implications
Published 2000“…The program: characterised air gun signal measurements; modelled air gun array sources and horizontal air gun signal propagation; developed an 'exposure model' to predict the scale of potential biological effects for a given seismic survey over its duration; made observations of humpback whales traversing a 3D seismic survey; carried out experiments of approaching humpback whales with a single operating air gun; carried out trials with an air gun approaching a cage containing sea turtles, fishes or squid; and modelled the response of fish hearing systems to airgun signals. …”
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The response of marine finfish and invertebrates to seismic survey noise
Published 2003“…Offshore seismic surveys involve the use of arrays of air-guns that produce repetitive high energy, low frequency sound. …”
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