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Updated: Mar 26, 2026

Necropsy-based Wild Fish Health Assessment

Necropsy-based Wild Fish Health Assessment

Published on: September 11, 2018

Anthropogenic noise increases fish mortality by predation.

Stephen D Simpson¹, Andrew N Radford², Sophie L Nedelec²

¹Biosciences, College of Life and Environmental Sciences, University of Exeter, Geoffrey Pope, Stocker Road, Exeter EX4 4QD, UK.

Nature Communications

|February 6, 2016

Summary

Motorboat noise increases fish stress and reduces predator evasion, leading to higher mortality. This highlights the significant impact of anthropogenic noise on marine animal survival and population dynamics.

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A Fish-feeding Laboratory Bioassay to Assess the Antipredatory Activity of Secondary Metabolites from the Tissues of Marine Organisms

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Published on: January 11, 2015

Area of Science:

Marine Biology
Behavioral Ecology
Environmental Science

Background:

Human activities generate noise pollution, impacting wildlife behavior and physiology.
Evidence linking noise pollution to animal survival rates is limited, particularly for marine species.

Purpose of the Study:

To investigate the effects of motorboat noise on the survival and physiology of a prey fish species.
To assess how motorboat noise impacts prey fish performance when facing predators.

Main Methods:

Exposed Ambon damselfish (Pomacentrus amboinensis) to motorboat noise (playback and direct disturbance).
Measured metabolic rates and predator response times in fish under noise conditions.
Conducted field experiments with natural predators (dusky dottyback, Pseudochromis fuscus) to quantify prey capture rates during motorboat noise events.

Main Results:

Motorboat noise elevated metabolic rates in Ambon damselfish.
Stressed fish exhibited slower and less frequent responses to simulated predator attacks.
Prey capture rates by predators significantly increased during motorboat noise exposure, with more than double the prey consumed in field trials.

Conclusions:

Motorboat noise negatively affects prey fish survival by impairing predator evasion.
Anthropogenic noise poses a significant threat to marine fish populations and demographics.
Management plans for marine environments should incorporate strategies to mitigate anthropogenic noise pollution.