Hearing Thresholds and the Impact of Anthropogenic Noise in Four Invasive Fishes: Silver (Hypophthalmichthys molitrix), Bighead (H. nobilis), Black (Mylopharyngodon piceus), and Grass (Ctenopharyngodon idella) Carp
2018-10
Loading...
View/Download File
Persistent link to this item
Statistics
View StatisticsJournal Title
Journal ISSN
Volume Title
Title
Hearing Thresholds and the Impact of Anthropogenic Noise in Four Invasive Fishes: Silver (Hypophthalmichthys molitrix), Bighead (H. nobilis), Black (Mylopharyngodon piceus), and Grass (Ctenopharyngodon idella) Carp
Authors
Published Date
2018-10
Publisher
Type
Thesis or Dissertation
Abstract
Due to extensive ecological impacts, aggressive range expansion, and their potential to enter the Laurentian Great Lakes, silver (Hypophthalmichthys molitrix) and bighead (H. nobilis) carp are primary targets for fisheries management. One promising measure to prevent their further dispersal is the use of acoustic deterrents because carp exhibit negative responses to sound. However, for an acoustic deterrent to be effective the sound level emitted needs to be above the hearing sensitivity for any target species, yet not too high to be detrimental to fish hearing. In this study, auditory evoked potentials (AEPs) were used to determine the impacts of exposure to high intensity sound on the hearing of silver and bighead carp. Auditory temporary threshold shifts (TTS) of up to 32 dB re 1 μPa SPLrms following sound exposure were observed between 0.2 – 2 kHz for both silver and bighead carp and sensitivity to some frequencies remained elevated up to 96-hrs following exposure. As there is often overlap of detectable frequency ranges among different species, there is the potential for acoustic deterrent signals to effectively target multiple fishes. Therefore, auditory thresholds were also determined for the invasive grass (Ctenopharyngodon idella) and black (Mylopharyngodon piceus) carp. Auditory thresholds were measured from 0.2 - 4 kHz with the greatest sensitivity between 0.3 - 0.4 kHz for both species. This study indicates that acoustic deterrents could impact carp hearing and that such deterrents may also be detectable by other invasive fishes in the area, such as grass and black carp. These findings will be used to increase the long-term efficacy of acoustic deterrents aimed at preventing the range expansion of invasive carps.
Description
University of Minnesota M.S. thesis. October 2018. Major: Integrated Biosciences. Advisor: Allen Mensinger. 1 computer file (PDF); vi, 57 pages.
Related to
Replaces
License
Series/Report Number
Funding information
Isbn identifier
Doi identifier
Previously Published Citation
Other identifiers
Suggested citation
Nissen, Andrew. (2018). Hearing Thresholds and the Impact of Anthropogenic Noise in Four Invasive Fishes: Silver (Hypophthalmichthys molitrix), Bighead (H. nobilis), Black (Mylopharyngodon piceus), and Grass (Ctenopharyngodon idella) Carp. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/201740.
Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.