Une décennie de suivis acoustiques continus des rorquals bleus, des rorquals communs et        du krill dans le parc marin du Saguenay–Saint-Laurent de 2007 à 2017

Simard, Yvan; Roy, Nathalie

doi:10.7202/1047152ar

Cited by 3 publications

(3 citation statements)

References 26 publications

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“…Ref. [ 57 ], for vessel classes similar to ours, obtained a 0.5–1 dB knots −1 correlation, giving credence to our findings.…”

Section: Discussionsupporting

confidence: 91%

“…Figure 8 was reproduced from [ 56 ] in which we added our contribution to the authors’ work. In a similar but parameter-controlled experience carried out at the mouth of the Saguenay River, (Figure 13 of [ 57 ]) found similar source levels in 1/3-octave bands for small recreational vessels (<10 m) as those shown in this work’s Figure 5 although the ∼6 dB re 1 μPa

m octave −1 monotonic decrease from 100 Hz to 25 kHz measured by the authors could not be retrieved here.…”

Section: Discussionsupporting

confidence: 66%

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Low-to-Mid-Frequency Monopole Source Levels of Underwater Noise from Small Recreational Vessels in the St. Lawrence Estuary Beluga Critical Habitat

Lagrois

Kowalski

Sénécal

et al. 2023

Sensors

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Anthropogenic noise from navigation is a major contributor to the disturbance of the acoustic soundscape in underwater environments containing noise-sensitive life forms. While previous studies mostly developed protocols for the empirical determination of noise source levels associated with the world’s commercial fleet, this work explores the radiated noise emitted by small recreational vessels that thrive in many coastal waters, such as in the St. Lawrence Estuary beluga population’s summer habitat. Hydrophone-based measurements in the Saguenay River (QC, Canada) were carried out during the summers of 2021 and 2022. Shore-based observations identified 45 isolated transits of small, motorized vessels and were able to track their displacement during their passage near the hydrophone. Received noise levels at the hydrophone typically fell below the hearing audiogram of the endangered St. Lawrence Estuary beluga. Monopole source levels at low frequencies (0.1–≲2 kHz) held on average twice the acoustic power compared to their mid-frequency (≳2–30 kHz) counterparts. The speed over ground of recreational vessel showed a positive correlation with the back-propagated monopole source levels. Estimations of the mid-frequency noise levels based on low-frequency measurements should be used moderately.

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“…Ref. [ 57 ], for vessel classes similar to ours, obtained a 0.5–1 dB knots −1 correlation, giving credence to our findings.…”

Section: Discussionsupporting

confidence: 91%

m octave −1 monotonic decrease from 100 Hz to 25 kHz measured by the authors could not be retrieved here.…”

Section: Discussionsupporting

confidence: 66%

Low-to-Mid-Frequency Monopole Source Levels of Underwater Noise from Small Recreational Vessels in the St. Lawrence Estuary Beluga Critical Habitat

Lagrois

Kowalski

Sénécal

et al. 2023

Sensors

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show abstract

“…Also, fish presence might be affected by the abundance of food resource as zooplankton, which is known to highly fluctuate over short periods in the Saguenay–St. Lawrence Marine Park (Simard & Roy, ). For the sandlance, in addition to the absence of detection in 2018, the amount of eDNA molecules measured in 2017 was systematically the lowest compared to the other species, even in shoals identified as fish without a swim bladder.…”

Section: Discussionmentioning

confidence: 99%

Groundtruthing of pelagic forage fish detected by hydroacoustics in a whale feeding area using environmental DNA

et al. 2020

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Tracking Whale Calls in the Lower St. Lawrence Seaway at Land Seismometers

Goblot,

Liu,

Plourde

et al. 2024

Seismica

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The Lower St. Lawrence Seaway (LSLS) is critical to Canada’s economy both as part of a major marine shipping corridor and a site of intensive fishing. Every year, fin whales and blue whales frequent the LSLS feeding ground. Understanding the mechanisms driving whale habitat usage is key for making informed decisions on shipping and fishing, reducing whale collision risks and mitigating noise pollution. We detect whales in the LSLS with land seismometers by using a method that relies on the intervals of the regularly repeating low frequency calls. The resulting catalogue contains 14,076 fin whale detections and 3,739 blue whale detections between February 2020 and January 2022. These detections follow the overall pattern of hydrophones, with most detections from fall to early winter in the Estuary and until mid-winter/spring in the Gulf. High detection rates in the Northwest Gulf throughout the winter months demonstrate that this region is potentially utilized year-round. This labelled catalogue may be suitable for developing a deep learning-based whale call detection algorithm. Making use of seismometers and deep learning can increase whale monitoring coverage within the LSLS and elsewhere.

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Une décennie de suivis acoustiques continus des rorquals bleus, des rorquals communs et du krill dans le parc marin du Saguenay–Saint-Laurent de 2007 à 2017

Cited by 3 publications

References 26 publications

Low-to-Mid-Frequency Monopole Source Levels of Underwater Noise from Small Recreational Vessels in the St. Lawrence Estuary Beluga Critical Habitat

Low-to-Mid-Frequency Monopole Source Levels of Underwater Noise from Small Recreational Vessels in the St. Lawrence Estuary Beluga Critical Habitat

Groundtruthing of pelagic forage fish detected by hydroacoustics in a whale feeding area using environmental DNA

Tracking Whale Calls in the Lower St. Lawrence Seaway at Land Seismometers

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