A5002940896- Marine animal studies overview
- Arctic and Antarctic ice dynamics
- Underwater Acoustics Research
- Marine and coastal plant biology
- Marine and fisheries research
- Global Energy and Sustainability Research
- Arctic and Russian Policy Studies
Scripps Institution of Oceanography
2019-2024
University of California, San Diego
2022-2024
UC San Diego Health System
2024
Sperm whales exhibit sexual dimorphism and sex-specific latitudinal segregation. Females their young form social groups are usually found in temperate tropical latitudes, while males forage at higher latitudes. Historical whaling data rare sightings of high latitude regions the North Pacific, such as Gulf Alaska (GOA) Bering Sea/Aleutian Islands (BSAI), suggest a more complex distribution than previously understood. most sighted recorded cetacean marine mammal surveys these but capturing...
Abstract Characterizing population structure and dynamics is critical for the conservation of endangered species. Monitoring sperm whales Physeter macrocephalus especially difficult because it requires monitoring different latitudes to capture most populations. Since their remarkable sexual dimorphism in body size reflected sounds, passive acoustic presents an opportunity contiguous patterns time, space, over large scales. We show that echolocation repetition rate (measured as inter‐click...
Abstract Construction in the southern New England wind energy area (WEA), a large-scale offshore farm on east coast of United States, started June 2023. Baseline data was collected from 2020 to 2022, with six passive acoustic recorders (SoundTraps) deployed at shallow (<60 m) sites vicinity Nantucket Shoals and Cox’s Ledge. Data were analysed for sperm whale presence, demographic composition assessed using interclick intervals. Presence varied by site, season, year. Sperm whales...
Sperm whales (Physeter macrocephalus) are a cosmopolitan species but only found in ice-free regions of the ocean. It is unknown how their distribution might change undergoing rapid loss sea ice and ocean warming like Baffin Bay eastern Canadian Arctic. In 2014 2018, sperm were sighted near Eclipse Sound, Bay: first recorded uses this region by whales. study, we investigate spatiotemporal Sound using visual acoustic data. We combine several published open-source, data sets to create map...
Abstract Sperm whales exhibit sexual dimorphism and sex-specific latitudinal segregation. Females their young form social groups are usually found in temperate tropical latitudes, while males forage at higher latitudes. Historical whaling data rare sightings of high latitude regions the North Pacific, such as Gulf Alaska (GOA) Bering Sea/Aleutian Islands (BSAI), suggest a more nuanced distribution than previously understood. most sighted recorded cetacean marine mammal surveys these but...
Sperm whales are a cosmopolitan species only found in ice-free regions. Understanding the distribution of sperm regions undergoing rapid loss sea ice and ocean warming is important. In 2014 2018, were sighted Pond Inlet, Baffin Bay: first recorded uses this region. We investigated whale near Inlet using visual sighting passive acoustic data from two recording sites between 2015 2019. no records sightings outside 2014/2018 observations. However, revealed presence yearly 2015-2019 late summer...
An accumulation of 26 859 days acoustic recordings (spanning over 74 years at six sites) was processed and analyzed to investigate the interannual, seasonal, diel patterns within ocean soundscapes. Biological sound levels (18-25 Hz 40–45 Hz) quantified energy from fin blue whales, ambient (63-Hz 800-Hz one-third-octave) ships wind, broadband spectra (15 1 kHz) identified changes across time space. varied seasonally correlated with large-scale climatic long-term fluctuations. During marine...
Sperm whales (Physeter macrocephalus) are cosmopolitan cetaceans exhibiting sex-based differences in ecology and distribution. present at Guadalupe Island (GI), Mexico, where tourism vessels employed ultrasonic antifouling (UA) devices through 2021. We investigated sperm whale presence demographics near the island examined their spatial distribution using signal amplitude distributions from a single-hydrophone system. were detected intermittently GI between 2018 2022. used inter-click...
Sperm whales are a sexually dimorphic, cosmopolitan species, with stratified distribution. Generally, males grow larger and travel to higher latitudes, while mature females immature form social units thought be more common in tropical temperate regions. Little is known about their migration, especially by for mating. Here, we outline an approach detect presence of sperm echolocation clicks the spatiotemporal distribution sexes at 12 sites along eastern North Pacific using click...
Passive acoustic monitoring (PAM) is an efficient method for large-scale marine mammal monitoring. PAM technologies concurrently sample multiple soniferous species, and when coupled with verified detectors, provide information that can be used to evaluate community composition. This analysis data collected by array of high-frequency recorders at eight sites between 30°0’N 42°0’N along the shelf-break in western North Atlantic Ocean. Daily presence 13 known species grouped unknown odontocetes...