No trout about it: behavioural and transcriptional effects of long-term noise exposure in brook trout (Salvelinus fontinalis)

Canadian Journal of Fisheries and Aquatic Sciences, Journal Year: 2025, Volume and Issue: 82, P. 1 - 16

Published: Jan. 1, 2025

Exposure to acute noise sources can lead negative behavioural outcomes and fitness deficits in fishes, but it is unknown whether fish habituate chronic exposures. As underwater increases globally, understanding how long-term exposures affect behavioural, morphological, transcriptional measures of stress critical. We tested responses captive brook trout ( Salvelinus fontinalis) immediately after exposure a 2 weeks exposure. Behavioural tests quantified movements before, during, sound presentation, with morphological changes assessed through ears whole brains samples, respectively. Pre-control pre-experimental exhibited increased swimming distance velocity, the 2-week exposure, post-experimental showed no response while post-control group remained responsive. Post-experimental significant differences transcription levels genes involved neuroplastic, appetite, relative other groups. Together these results suggest that may appear unresponsive via metrics anthropogenic noises they still show at level possible effects.

Language: Английский

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Males miss and females forgo: Auditory masking from vessel noise impairs foraging efficiency and success in killer whales

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(9)

Published: Sept. 1, 2024

Abstract Understanding how the environment mediates an organism's ability to meet basic survival requirements is a fundamental goal of ecology. Vessel noise global threat marine ecosystems and increasing in intensity spatiotemporal extent due growth shipping coupled with physical changes ocean soundscapes from warming acidification. Odontocetes rely on biosonar forage, yet determining consequences vessel foraging has been limited by challenges observing underwater outcomes measuring levels received individuals. To address these challenges, we leveraged unique acoustic movement dataset 25 animal‐borne biologging tags temporarily attached individuals two populations fish‐eating killer whales ( Orcinus orca ) highly transited coastal waters (1) test for effects behaviors—searching (slow‐click echolocation), pursuit (buzzes), capture (2) investigate mechanism interference. For every 1 dB increase maximum level, there was 4% odds searching prey both sexes, 58% decrease females 12.5% sexes. Moreover, all but one deep (≥75 m) attempt ≥110 re μPa (15–45 kHz band; n = 6 dives 4 whales) resulted failed capture. These responses are consistent auditory masking mechanism. Our findings demonstrate across multiple phases odontocete foraging, underscoring importance managing anthropogenic inputs into achieve conservation objectives acoustically sensitive species. While timescales recovering depleted species may span decades, suggest that complementary actions reduce short term offer critical pathway opportunities.

Language: Английский

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Comparison between the acoustic fields of conventional and tubercled propellers

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(2)

Published: Feb. 1, 2025

The results of large eddy simulations on a cylindrical grid consisting 5.8 × 109 points are utilized to reconstruct the acoustic fields radiated by conventional and tubercled propellers in wetted conditions, using Ffowcs Williams Hawkings analogy. analysis flow features demonstrates that while distribution turbulent fluctuations pressure surface propeller blades is substantially affected presence leading edge tubercles (LETs), this not case for wake flow, which does display dramatic differences across cases. As result, loading component field, one at most frequencies, significantly modified implementation LETs, quadrupole component, rather similar between geometries. sound reduced around blade frequency, fb, it reinforced higher 10fb. Furthermore, was found usually one, highest resolved above 20fb, verified more intense than linear even far both propellers.

Language: Английский

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Rethinking the design of marine protected areas in coastal habitats

Marine Pollution Bulletin, Journal Year: 2025, Volume and Issue: 213, P. 117642 - 117642

Published: Feb. 12, 2025

The number and size of marine protected areas (MPAs), implemented globally to protect coastal habitats from human pressures, is growing annually. Commercial recreational fishing are a commonly recognised stressor in habitats, but the impact sound pollution largely overlooked MPA design. Coastal taxonomically diverse, this diversity represented soundscape, with many species relying on effective communication for vital life functions, including breeding, prey selection, predator avoidance. Sound can mask cause behavioural physiological effects. More research required understand role ecosystems, which actively produce sound. In interim, effects those have been studied, relative ease be mitigated, strongly supports addressing design management existing future MPAs.

Language: Английский

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Assessment of the effectiveness of ship machinery noise reduction measures using a test platform in a water basin

Ocean Engineering, Journal Year: 2024, Volume and Issue: 313, P. 119380 - 119380

Published: Oct. 3, 2024

Language: Английский

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Musseling through: Mytilus byssal thread production is unaffected by continuous noise

Marine Environmental Research, Journal Year: 2024, Volume and Issue: 200, P. 106661 - 106661

Published: July 30, 2024

Anthropogenic low-frequency noise (ALFN) is a rising pollutant in the world oceans. Despite ubiquity of ALFN, its effect on marine invertebrates still poorly understood. Here, we tested how continuous (CLFN), substantial component affects byssal thread production Mytilus, cosmopolitan genus mussels with high ecological and economic importance. The effects acute CLFN exposure predator cues byssogenesis by Mytilus spp. were explored both presence absence cues. While effluents increased production, had seemingly no counts. Further, trends suggested synergistic behavioral indifference toward could contribute to observed prevalence these animals inherently disturbed habitats. This would partly explain their success colonizing persisting artificial substrata rife disturbances.

Language: Английский

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Underwater noise in the Xinluo Reserve: a potential stressor for the critically endangered Yangtze finless porpoise

Water Biology and Security, Journal Year: 2024, Volume and Issue: unknown, P. 100342 - 100342

Published: Dec. 1, 2024

Language: Английский

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