Happy Whale Humpback Happenings
June 22, 2026
A few interesting matches have come out of our Mid-Atlantic Humpback Whale Catalog efforts and partnership with Happy Whale!
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Kemp’s ridley / Loggerhead Hybrid Turtle Tagged at Jekyll Island
June 15, 2026
Researchers were surprised by an unusual turtle that stranded in Georgia-- a Kemp’s ridley / Loggerhead Hybrid Turtle, and were able to tag the animal for release.
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A Macrocephalus Mother's Day Tradition
May 27, 2026
HDR-lead team encountered a group of mainly female sperm whales with calves on Mother's Day for the 2nd year in a row, and successfully deployed a tag from a drone. We believe it's the first CATS tag deployed on a sperm whale via drone.
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Current
Pilot Project to Assess Feasibility of Multi-Sensor Tagging of Rough-Toothed Dolphins at the Pacific Missile Range Facility (PMRF)
Project Objectives
Determine feasibility and efficacy of deploying high resolution multi-sensor tags on rough-toothed dolphins at PMRF and determine how collected data can be used to move toward a better understanding of the effects of Navy activities, ultimately leading to PCoD modelling.
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Current
Visual Survey and Tagging of Hawaiian Odontocetes
Project Objectives
(1) define the spatial movement and habitat use patterns of species that are exposed to mid-frequency active (MFA) sonar (2) determine how these patterns influence exposure and potential responses
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Complete
Passive Acoustic Monitoring in the Mariana Islands: Density Estimation of Beaked Whales along the West Coast of Guam
Project Objectives
Determine what species of marine mammals, specifically beaked whales, are present in the Marianas and examine their spatial and temporal patterns of acoustic behavior. Calculate acoustic abundance and density of beaked whales in surveyed area. Analyze sonar detections in area.
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Complete
Hawaiian Monk Seal Tagging
Project Objectives
Investigate potential impacts of naval activities on Hawaiian monk seals
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Current
Monitoring Cetaceans in Hood Canal
Project Objectives
This 12‑month integrated pilot project combines three complementary components: (A) shore‑based theodolite monitoring of harbor porpoises, (B) high‑bandwidth passive acoustic monitoring and soundscape characterization, and (C) suction‑cup multi‑sensor tag deployments on Bigg’s (transient) killer whales. Together, these data streams will quantify occurrence, movement, diving, and behavioral context for these two key species in relation to the local soundscape—including operational signals near the Dabob Bay Range Complex (DBRC) and the Bangor Trident Base. Results can provide an empirical foundation and inform the study design of future cetacean behavioral response studies (BRS) in Hood Canal.
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Complete
Mariana Islands Sea Turtle and Cetacean Survey (MISTICS)
Project Objectives
Determine what species of marine mammals and sea turtles are present and estimate abundance.
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Current
Marine Mammal Monitoring on Navy Ranges (M3R)
Project Objectives
Improve understanding of the long term trends in occurrence of marine mammals on the PMRF and SOAR ranges.
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Complete
North Pacific Humpback Whale Tagging
Project Objectives
Determine the occurrence, movement patterns, and residency patterns of multiple humpback whale Distinct Population Segments within Pacific Ocean Navy Range Complexes
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Complete
Blue and Fin Whale Satellite Tagging
Project Objectives
Determine the movement patterns, occurrence, and residence times of blue whales and fin whales within U.S. Navy training and testing areas as well as Biologically Important Areas along the U.S. West Coast
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Current
Long Term Acoustic Monitoring of Marine Mammals Utilizing the Instrumented Range at Pacific Missile Range Facility (PMRF)
Project Objectives
Improve understanding of the long term trends in occurrence of marine mammals (e.g., minke, humpback, fin, Bryde's, Blainville's) on the PMRF range. Examine what, if any, acoustic and physical behavioral responses occur to Navy activities.
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Complete
Acoustic and Visual Survey for Cetaceans in Behm Canal and Southern Clarence Strait, Alaska
Project Objectives
Conduct visual line-transect surveys and passive acoustic monitoring for cetaceans, and other marine mammals, to determine species occurrence, and to estimate density within Navy’s testing range. Acoustic monitoring devices will be deployed during the vessel based survey, and long-term passive acoustic hydrophones will be monitored for year-round detection of rare and/or cryptic cetacean species.
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Summary of Marine Mammal Passive Acoustic Monitoring for the Atlantic Fleet using High-frequency Acoustic Recording Packages: 2017 Annual Report. Hildebrand et al.
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Date Published:
  • January 1, 2018

Passive acoustic monitoring was conducted using High-frequency Acoustic Recording Packages (HARPs) deployed in waters offshore of Virginia, North Carolina, and Florida with support from the US Navy during 2016 - 2017. The HARPs recorded underwater sounds between 10 Hz and 100 kHz. Data analysis consisted of analyst scans of long-term spectral averages (LTSAs) and spectrograms, and automated computer algorithm detection when possible. Three frequency bands were analyzed for marine mammal vocalizations and anthropogenic sounds: (1) Lowfrequency, between 10-1000 Hz, (2) Mid-frequency, between 1,000-5,000 Hz, and (3) Highfrequency, between 1-100 kHz.

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  • 5,208.04 KB
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Major Training Exercise Aerial Monitoring SOCAL Jun/Jul 2009. Smultea et al.
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Date Published:
  • July 30, 2009

In support of the U.S. Navy’s (Navy) Marine Mammal Monitoring Plan (M3P) in the Southern California Range Complex (SOCAL) (DoN 2009), aerial surveys were conducted by Marine Mammal Research Consultants (MMRC) and Smultea Environmental Sciences (SES) to monitor marine mammals and sea turtles (MM/ST) during June and July 2009 in the SOCAL area.

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  • 4,717.48 KB
Ocean:Region:Species:Methods:
Effects of duty-cycled passive acoustic recordings on detecting the presence of beaked whales in the northwest Atlantic. Stanistreet, J.E., D.P. Nowacek, A.J. Read, S. Baumann-Pickering, H.B. Moors-Murphy, and S.M. Van Parijs. Journal of the Acoustical Society of America. 2026. 140(1):EL31-EL37
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Date Published:
  • March 2, 2026

This study investigated the effects of using duty-cycled passive acoustic recordings to monitor the daily presence of beaked whale species at three locations in the northwest Atlantic. Continuous acoustic records were subsampled to simulate duty cycles of 50%, 25%, and 10% and cycle period durations from 10 to 60 min. Short, frequent listening periods were most effective for assessing the daily presence of beaked whales. Furthermore, subsampling at low duty cycles led to consistently greater underestimation of Mesoplodon species than either Cuvier's beaked whales or northern bottlenose whales, leading to a potential bias in estimation of relative species occurrence.

Publication:Ocean:Region:Species:Methods:
Using passive acoustic monitoring to document the distribution of beaked whale species in the western North Atlantic Ocean. Stanistreet, J.E., D.P. Nowacek, S. Baumann-Pickering, J. Bell, D.M. Cholewiak, J.A. Hildebrand, L.E.W. Hodge, H. Moors-Murphy, S.M. Van Parijs, A.J. Read. Canadian Journal of Fisheries and Aquatic Sciences. 2017. 74(12): 2098-2109. https://doi.org/10.1139/cjfas-2016-0503
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Date Published:
  • December 1, 2017

Little is known about the ecology of many beaked whale species, despite concerns raised by mass strandings linked to certain sources of anthropogenic noise. Here, we used passive acoustic monitoring to examine spatial and temporal patterns in beaked whale occurrence at six locations along the continental slope in the western North Atlantic Ocean.

Publication:Ocean:Region:Species:Methods:
Occurrence and Acoustic Ecology of North Atlantic Shelf Break Species and Effects of Anthropogenic Noise: 2019 Annual Progress Report. Van Parijs et al.
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Date Published:
  • January 1, 2020

Long-term high-frequency acoustic recording packages (HARPs) at eight sites along the western North Atlantic shelf break.

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  • 1,430.35 KB
Ocean:Region:Species:Methods:
Monitoring the acoustic ecology of the shelf break of Georges Bank, Northwestern Atlantic Ocean: new approaches to visualizing complex acoustic data. Weiss, S.G., D. Cholewiak, K.E. Frasier, J.S. Trickey, S. Baumann-Pickering, J.A. Hildebrand, and S.M. Van Parijs. Marine Policy. 2021. Volume 130. DOI: 10.1016/j.marpol.2021.104570
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Date Published:
  • August 1, 2021

This study aims to assess the co-occurrence of cetaceans and anthropogenic activities, presenting simple and accessible visualizations of the temporal and spectral overlap.

Publication:Ocean:Region:Species:Methods:
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