ArticleScientific reports2019
Interacting effects of vessel noise and shallow river depth elevate metabolic stress in Ganges river dolphins.
Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed.
- Exploring the evidence of direct threats to cetaceans from maritime vessels: A systematic map.PloS one · 2026Article
- Influence of vessel disturbance on Pacific harbour porpoise (Phocoena phocoena vomerina) echolocation.Ecological applications : a publication of the Ecological Society of America · 2025Article
- Humpback whale masked hearing thresholds in noise measured with modified behavioral observation audiometry.Communications biology · 2025Article
- Towards automated long-term acoustic monitoring of endangered river dolphins: a case study in the Brazilian Amazon floodplains.Scientific reports · 2023Article
- The effect of physiographic and hydrologic complexities and their alterations on the distribution of obligate freshwater dolphins.Ecology and evolution · 2023Article
- A Quieter Ocean: Experimentally Derived Differences in Attentive Responses ofAnimals : an open access journal from MDPI · 2023Article
- Pingers are effective in reducing net entanglement of river dolphins.Scientific reports · 2022Article
- Cetacean Acoustic Welfare in Wild and Managed-Care Settings: Gaps and Opportunities.Animals : an open access journal from MDPI · 2021Review
- Article
- In-stream habitat availability for river dolphins in response to flow: Use of ecological integrity to manage river flows.PloS one · 2021Article
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Authors and funding
4 authors.
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Abstract
In riverine 'soundscapes', complex interactions between sound, substrate type, and depth create difficulties in assessing impacts of anthropogenic noise pollution on freshwater fauna. Underwater noise from vessels can negatively affect endangered Ganges river dolphins (Platanista gangetica), which are 'almost blind' and rely entirely on high-frequency echolocation clicks to sense their environment. We conducted field-based acoustic recordings and modelling to assess acoustic responses of Platanista to underwater noise exposure from vessels in the Ganga River (India), which is now being transformed into a major waterway. Dolphins showed enhanced activity during acute noise exposure and suppressed activity during chronic exposure. Increase in ambient noise levels altered dolphin acoustic responses, strongly masked echolocation clicks, and more than doubled metabolic stress. Noise impacts were further aggravated during dry-season river depth reduction. Maintaining ecological flows, downscaling of vessel traffic, and propeller modifications to reduce cavitation noise, could help mitigate noise impacts on Ganges river dolphins.
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