Hilary Moors-Murphy

Hilary Moors-Murphy
Fisheries and Oceans Canada | DFO · Bedford Institute of Oceanography

PhD

About

42
Publications
7,732
Reads
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420
Citations
Additional affiliations
August 2014 - present
Fisheries and Oceans Canada
Position
  • Cetacean Research Scientist
Description
  • I primarily conduct research relevant to the monitoring and conservation of species at risk (and other cetaceans) in eastern Canadian waters. My main area of expertise is passive acoustic monitoring of marine mammals.
Education
January 2005 - October 2012
Dalhousie University
Field of study
  • Passive Acoustic Monitoring of Cetaceans
May 2003 - October 2004
University of New Brunswick Saint John
Field of study
  • Seal acoustics

Publications

Publications (42)
Article
Full-text available
Experimental research has shown that beaked whales exhibit strong avoidance reactions to naval active sonars used during antisubmarine warfare training exercises, including cessation of echolocation and foraging activity. Behavioural responses to sonar have also been linked to strandings and mortality. Much of the research on the responses of beake...
Article
Full-text available
Anthropogenic underwater noise has been identified as a potentially serious stressor for the critically endangered North Atlantic right whale (NARW). The Government of Canada is undertaking steps to better characterize the noise sources of most concern and their associated impacts, but there is currently an insufficient understanding of which noise...
Article
Full-text available
At the onset of the winter breeding season, male humpback whales begin a prominent breeding behaviour, singing. Early songs are produced on summer feeding grounds prior to migration, but little is known about the proximate cues for the initiation of this behaviour, nor where or when it begins. We document the phenology of humpback whale singing alo...
Article
In the original paper [JASA Express Lett. 1(1), 011203 (2021)], a method for processing, storing, and sharing high-bandwidth, passive acoustic spectral data that optimizes data volume while maintaining reasonable data resolution was proposed. The format was a hybrid that uses 1-Hz resolution up to 455 Hz and millidecade frequency bands above 455 Hz...
Article
This Letter proposes a frequency scaling for processing, storing, and sharing high-bandwidth, passive acoustic spectral data that optimizes data volume while maintaining reasonable data resolution. The format is a hybrid that uses 1 Hz resolution up to 455 Hz and millidecade frequency bands above 455 Hz. This hybrid is appropriate for many types of...
Article
Full-text available
Many organizations collect large passive acoustic monitoring (PAM) data sets that need to be efficiently and reliably analyzed. To determine appropriate methods for effective analysis of big PAM data sets, we undertook a literature review of baleen whale PAM analysis methods. Methodologies from 166 studies (published between 2000-2019) were summari...
Article
Full-text available
Six baleen whale species are found in the temperate western North Atlantic Ocean, with limited information existing on the distribution and movement patterns for most. There is mounting evidence of distributional shifts in many species, including marine mammals, likely because of climate‐driven changes in ocean temperature and circulation. Previous...
Article
Passive acoustic monitoring (PAM) is crucial to expanding the knowledge of beaked whales, including the northern bottlenose whale (Hyperoodon ampullatus) and Sowerby's beaked whale (Mesoplodon bidens). Existing descriptions of clicks produced by these species are limited by sample size, number of individuals recorded, and geographic scope. Data fro...
Article
Full-text available
Humpback whale songs have been described worldwide and studies exploring non-song vocal behavior continue to expand; however, studies on the transition periods when whales shift to and from the seasonal behavioral state of singing are lacking and may be potentially informative regarding the proximal factors controlling the onset and offset of humpb...
Poster
Passive acoustic monitoring was used to investigate seasonal and diel variations in call presence of sei whales in two basins on the Scotian Shelf.
Article
Full-text available
Given new distribution patterns of the endangered North Atlantic right whale (NARW; Eubalaena glacialis) population in recent years, an improved understanding of spatio-temporal movements are imperative for the conservation of this species. While so far visual data have provided most information on NARW movements, passive acoustic monitoring (PAM)...
Article
Humpback whale use of areas off eastern Canada is poorly understood, a knowledge gap that could impact future conservation efforts. We describe the acoustic occurrence of humpback whales in and around the Gully Marine Protected Area (MPA), an eastern Scotian Shelf submarine canyon. Near-continuous acoustic recordings sampling at 16 kHz were collect...
Article
Full-text available
Using long-term data from government, non-government, academic, and industry sources, we developed Species Distribution Models (SDM) to predict priority areas to target and enhance blue whale Balaenoptera musculus and northern bottlenose whale Hyperoodon ampullatus monitoring efforts in eastern Canada. Priority areas for blue whales were located pr...
Article
Beaked whales represent some of the least understood marine mammals worldwide with the movements and distribution of many species largely unknown. Around eastern Canada current knowledge is limited to the eastern Scotian shelf and northern bottlenose whales. The acoustic signals of the beaked whale species are recognizable and sufficiently unique t...
Article
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. W...
Article
Passive acoustic monitoring (PAM) is becoming a more widely accepted tool in mitigating the potential impact of man-made noise on marine mammals. Many marine mammals, and in particular cetaceans (whales and dolphins), use sound to communicate, navigate, forage, and avoid predators. Automated vocalization detectors have been in development for many...
Article
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 peri...
Article
Full-text available
In October 2012, Fisheries and Oceans Canada began collection of two years of near-continuous autonomous acoustic recordings in the Gully Marine Protected Area and adjacent slope areas between the Gully and Shortland canyon, and between Shortland and Haldimand canyons south of Nova Scotia, Canada. Data were sampled at 16 ksps for 13 min alternating...
Presentation
Variations in calls or songs between areas are increasingly acknowledged as a way to assess stock structure. We present the results of an analysis of 163 fin whale (FW) songs recorded in seven areas of the North Atlantic (NA): Irminger Sea, Davis Strait, Grand Banks of Newfoundland, Southern Newfoundland, Gulf of St. Lawrence, eastern Scotian Shelf...
Article
Passive acoustic monitoring (PAM) is often suggested as an effective technology to mitigate impacts from anthropogenic activities; however, the ability to reliably and efficiently detect, locate, and count cetaceans using PAM is still in development. One particularly useful application of PAM is species density estimation, which requires an estimat...
Technical Report
Full-text available
Three midwater-trawl surveys of the nekton and micronekton at meso- and bathypelagic depths in The Gully, a submarine canyon and Marine Protected Area immediately east of Sable Island, were conducted in August / September 2008, August 2009 and March 2010 respectively. The surveys used an IYGPT net and followed a fixed-station, depth-stratified desi...
Technical Report
Three midwater-trawl surveys of the nekton and micronekton at meso- and bathypelagic depths in The Gully, a submarine canyon and Marine Protected Area immediately east of Sable Island, were conducted in August / September 2008, August 2009 and March 2010 respectively. The surveys were designed to gather data on fish, cephalopods and crustaceans but...
Article
Full-text available
The Gully Marine Protected Area (MPA) is a large submarine canyon at the edge of the Scotian Shelf, south of Nova Scotia. A resident population of northern bottlenose whales are known to occur in the Gully throughout the year, and the canyon provides important foraging grounds for the population. Bottom-mounted Autonomous Multichannel Acoustic Reco...
Article
Full-text available
Building on the preliminary Marine Protected Area (MPA) network analysis completed by Horsman et al. (2011), Fisheries and Oceans Canada (DFO) is leading a systematic approach to MPA network planning in the Scotian Shelf Bioregion. The major steps in the planning process are described in the National Framework for Canada’s Network of MPAs (Governme...
Article
In a recently published paper, Agardy et al. [Mind the gap: addressing the shortcomings of marine protected areas through large scale marine spatial planning. Marine Policy 2011;35:226–32] discuss the shortcomings of several Marine Protected Areas (MPAs) including the Gully MPA, located 200 km offshore Nova Scotia, Canada. Although the paper's crit...
Article
Full-text available
Akoostix continues to experiment with flexible, low-processing-load marine mammal detection options suitable for implementation in both workstations and low-power embedded systems. Building on previous work, additional processing stages have been added to normalize and de-noise spectrograms using a wide variety of user-configurable options. These p...
Article
Full-text available
Harp seal (Pagophilus groenlandicus (Erxleben, 1777)) daytime calling depth during the breeding season and Weddell seal (Leptonychotes weddellii (Lesson, 1826)) daytime and nighttime calling depth during the winter and breeding seasons were investigated using a small vertical array with hydrophones placed at depths of 10 and 60 m. Rough calling dep...
Article
Full-text available
Many vocalizations produced by Weddell seals (Leptonychotes weddellii) are made up of repeated individual distinct sounds (elements). Patterning of multiple element calls was examined during the breeding season at Casey and Davis, Antarctica. Element and interval durations were measured from 405 calls all > 3 elements in length. The duration of the...
Article
Full-text available
Rhythmically repeated calls used during vocal communication have important implications for the extent to which pinnipeds successfully transmit information over long distances and during times of high levels of background noise. Harp seals (Pagophilus groenlandicus) have a large vocal repertoire and many of their underwater vocalizations consist of...
Article
Full-text available
Rhythmically repeated calls used during vocal communication have important implications for the extent to which pinnipeds successfully transmit information over long distances and during times of high levels of background noise. Harp seals (Pagophilus groenlandicus) have a large vocal repertoire and many of their underwater vocalizations consist of...
Article
Full-text available
While echolocation in beaked whales has been studied extensively, the use of sound for communication in these animals is largely unexplored. We present analyses of acoustic recordings from two species of beaked whale describing a vocal pattern we term the double-click – a pair of clicks with inter-click intervals (ICIs) much smaller than those of i...

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Projects

Projects (3)
Project
Patterns of Biodiversity, Trophic Control, Role of Body Size in shaping ecosystems
Project
Understand the pelagic ecosystems in The Gully MPA and submarine canyon