Skip to main content
Duke University Libraries
DukeSpace Scholarship by Duke Authors
  • Login
  • Ask
  • Menu
  • Login
  • Ask a Librarian
  • Search & Find
  • Using the Library
  • Research Support
  • Course Support
  • Libraries
  • About
View Item 
  •   DukeSpace
  • Theses and Dissertations
  • Nicholas School of the Environment
  • View Item
  •   DukeSpace
  • Theses and Dissertations
  • Nicholas School of the Environment
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

USING PASSIVE ACOUSTICS TO MONITOR BOTTLENOSE DOLPHIN (TURSIOPS TRUNCATUS) USE OF TWO MILITARY RANGES IN PAMLICO SOUND, NORTH CAROLINA

Thumbnail
View / Download
14.6 Mb
Date
2009-04-24
Author
Laura, Anna-Marie
Advisor
Read, Andrew
Repository Usage Stats
354
views
525
downloads
Abstract
A passive acoustic monitoring device to detect bottlenose dolphin (Tursiops truncatus) presence in two military ranges in Pamlico Sound, NC is being developed by researchers at the Duke University Marine Lab. Potential adverse effects of military activities in these ranges include temporary or permanent hearing loss, tissue damage, altered habitat use, and changes in behavior. The real-time passive acoustic monitoring system allows for automated detection of bottlenose dolphin whistles and alerts the Marine Core Air Station (MCAS) Cherry Point when dolphin whistles are detected. Passive acoustic monitoring relies on the detection of vocalizations, so I conducted focal follows coupled with acoustic monitoring to determine group vocalization rates. Dolphins near the ranges produced at least one detectable whistle in 25% of one-minute bins. Behavioral state and group size affected whistle production, and probability of whistle presence was significantly higher for socializing dolphins and groups of 1-2 and 11-20 dolphins. I examined focal follow tracks to determine rates of travel and calculated potential residence time for dolphins in the range. The average rate of travel for dolphins in the area was 0.871m/s, and rate of travel when traveling was significantly higher than any other behavior state. Residence time was also influenced by behavioral state and group size. The probability of whistle production is sufficient for an automated real-time passive acoustic detection device to detect bottlenose dolphins. Results of this study could be used by MCAS Cherry Point to establish procedures that will mitigate harmful effects to bottlenose dolphins without sacrificing military readiness. This type of system has potential for use at other coastal military ranges, bridge demolitions and other near shore activities posing threats to coastal dolphin populations and other marine mammals.
Type
Master's project
Department
Nicholas School of the Environment and Earth Sciences
Subject
passive acoustics
Bottlenose dolphins (Tursiops truncatus)
bombing range
Permalink
https://hdl.handle.net/10161/981
Citation
Laura, Anna-Marie (2009). USING PASSIVE ACOUSTICS TO MONITOR BOTTLENOSE DOLPHIN (TURSIOPS TRUNCATUS) USE OF TWO MILITARY RANGES IN PAMLICO SOUND, NORTH CAROLINA. Master's project, Duke University. Retrieved from https://hdl.handle.net/10161/981.
Collections
  • Nicholas School of the Environment
More Info
Show full item record
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 United States License.

Rights for Collection: Nicholas School of the Environment


Works are deposited here by their authors, and represent their research and opinions, not that of Duke University. Some materials and descriptions may include offensive content. More info

Make Your Work Available Here

How to Deposit

Browse

All of DukeSpaceCommunities & CollectionsAuthorsTitlesTypesBy Issue DateDepartmentsAffiliations of Duke Author(s)SubjectsBy Submit DateThis CollectionAuthorsTitlesTypesBy Issue DateDepartmentsAffiliations of Duke Author(s)SubjectsBy Submit Date

My Account

LoginRegister

Statistics

View Usage Statistics
Duke University Libraries

Contact Us

411 Chapel Drive
Durham, NC 27708
(919) 660-5870
Perkins Library Service Desk

Digital Repositories at Duke

  • Report a problem with the repositories
  • About digital repositories at Duke
  • Accessibility Policy
  • Deaccession and DMCA Takedown Policy

TwitterFacebookYouTubeFlickrInstagramBlogs

Sign Up for Our Newsletter
  • Re-use & Attribution / Privacy
  • Harmful Language Statement
  • Support the Libraries
Duke University