A5018519425- Marine animal studies overview
- Underwater Acoustics Research
- Arctic and Antarctic ice dynamics
- Marine and fisheries research
- Animal Vocal Communication and Behavior
- Marine and coastal plant biology
- Cephalopods and Marine Biology
- Avian ecology and behavior
- Wildlife Ecology and Conservation
- Underwater Vehicles and Communication Systems
- Identification and Quantification in Food
- Ichthyology and Marine Biology
- Aerospace Engineering and Energy Systems
- Species Distribution and Climate Change
- Bat Biology and Ecology Studies
- Coral and Marine Ecosystems Studies
- Marine Ecology and Invasive Species
- International Maritime Law Issues
- Advanced Image and Video Retrieval Techniques
Marine Ecology and Telemetry Research
2016-2025
Cascadia Research Collective
2005-2016
Cuvier's beaked whales (Ziphius cavirostris) are known as extreme divers, though behavioral data from this difficult-to-study species have been limited. They also the most often stranded in association with Mid-Frequency Active (MFA) sonar use, a relationship that remains poorly understood. We used satellite-linked tags to record diving behavior and locations of eight Ziphius off Southern California coast for periods up three months. The effort resulted 3732 hr dive associated regional...
Most marine mammal strandings coincident with naval sonar exercises have involved Cuvier's beaked whales ( Ziphius cavirostris ). We recorded animal movement and acoustic data on two tagged obtained the first direct measurements of behavioural responses this species to mid-frequency active (MFA) signals. Each recording included a 30-min playback (one 1.6-s simulated MFA signal repeated every 25 s); one whale was also incidentally exposed from distant exercises. Whales responded strongly...
Mid-frequency military (1-10 kHz) sonars have been associated with lethal mass strandings of deep-diving toothed whales, but the effects on endangered baleen whale species are virtually unknown. Here, we used controlled exposure experiments simulated sonar and other mid-frequency sounds to measure behavioural responses tagged blue whales (Balaenoptera musculus) in feeding areas within Southern California Bight. Despite using source levels orders magnitude below some operational systems, our...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 494:291-306 (2013) - DOI: https://doi.org/10.3354/meps10508 Strong maternal fidelity and natal philopatry shape genetic structure in North Pacific humpback whales C. Scott Baker1,*, Debbie Steel1, John Calambokidis2, Erin Falcone2, Ursula González-Peral3, Jay Barlow4, Alexander M. Burdin5, Phillip J....
Abstract We estimated the abundance of humpback whales in North Pacific by capture‐recapture methods using over 18,000 fluke identification photographs collected 2004–2006. Our best estimate was 21,808 (CV = 0.04). biases this value a simulation model. Births and deaths, which violate assumption closed population, resulted bias +5.2%, exclusion calves samples −10.5%, failure to achieve random geographic sampling −0.4%, missed matches +9.3%. Known sex‐biased favoring males breeding areas did...
The extreme body size of blue whales requires a high energy intake and therefore demands efficient foraging strategies. As an obligate lunge feeder on aggregations small zooplankton, engulf large volume prey-laden water in single, rapid gulp. efficiency this feeding mechanism is strongly dependent the amount prey that can be captured during each lunge, yet food resources tend to patchily distributed both space time. Here, we measured three-dimensional kinematics behaviour krill, using...
Abstract Marine mammals may be negatively affected by anthropogenic noise. Behavioural response studies (BRS) aim to establish a relationship between noise exposure conditions (dose) from potential stressor and associated behavioural responses of animals. A recent series BRS have focused on the effects naval sonar sounds cetaceans. Here, we review current state understanding impact marine highlight knowledge gaps future research priorities. Many mammal species exhibit sounds. However, vary...
For marine animals, acoustic communication is critical for many life functions, yet individual calling behavior poorly understood most large whale species. These topics are important understanding social and can also serve as a baseline behavioral studies assessing response to disturbance. Using new technique identifying the individual, we measured body orientation, dive behavior, surface in relation call production tagged fin whales Southern California. Behavioral metrics associated with...
Cuvier's beaked whales ( Ziphius cavirostris ) have stranded in association with mid-frequency active sonar (MFAS) use, and though the causative mechanism linking these events remains unclear, it is believed to be behaviourally mediated. To determine whether MFAS use was associated behavioural changes this species, satellite tags were used record diving movements of 16 for up 88 days a region frequent training off coast Southern California. Tag data combined summarized records concurrent...
Beaked whales are hypothesized to be particularly sensitive anthropogenic noise, based on previous strandings and limited experimental observational data. However, few species have been studied in detail. We describe the underwater behavior of a Baird's beaked whale (Berardius bairdii) from first deployment multi-sensor acoustic tag this species. The animal exhibited shallow (23 ± 15 m max depth), intermediate (324 49 m) deep (1138 243 dives. Echolocation clicks were produced with mean...
The relationship between beaked whales and certain anthropogenic sounds remains poorly understood of great interest. Although Cuvier's (Ziphius cavirostris) are widely distributed, little is known their behavior population structure throughout much range. We conducted a series five combined visual-acoustic marine mammal surveys from 2006 to 2008 in the southern San Nicolas Basin, site frequent naval activity off California coast, west Clemente Island. study area was defined by 1,800 km2...
Abstract Aim Understanding the spatial ecology of endangered species is crucial to predicting habitat use at scales relevant conservation and management. Here, we aim model influence biophysical conditions on suitability for fin whales Balaenoptera physalus , with a view informing management in heavily impacted ocean region. Location We satellite‐tracked movements 67 through California Current System ( CCS ), dynamic eastern boundary upwelling ecosystem Northeast Pacific. Methods multi‐scale...
Several legal acts mandate that management agencies regularly assess biological populations. For species with distinct markings, these assessments can be conducted noninvasively via capture-recapture and photographic identification (photo-ID), which involves processing considerable quantities of data. To ease this burden, increasingly rely on automated (ID) algorithms. Identification algorithms present an opportunity-reducing the cost population assessments-and a challenge-propagating...
An animal's movement reflects behavioral decisions made to address ecological needs; specifically, that will become less directional in regions with high prey availability, indicating foraging behavior. In the marine realm, animal behavior occurs below sea surface and is difficult observe. We used an extensive satellite tagging dataset explore how physical biological habitat characteristics influence blue (Balaenoptera musculus) fin (B. physalus) whale California Current Ecosystem across...
Abstract Correlations between surface behavior and concurrent underwater vocalizations were modeled for common dolphins ( Delphinus spp.) in the Southern California Bight (SCB) over multiple field seasons. Clicks, pulsed calls, whistles examined, with a total of 50 call features identified. Call used to classify using random forest decision trees, rates correct classification reaching 80.6% fast travel, 84.6% moderate 59.8% slow 58% foraging behavior. Common spent most their time traveling....
Abstract Researchers can investigate many aspects of animal ecology through noninvasive photo–identification. Photo–identification is becoming more efficient as matching individuals between photos increasingly automated. However, the convolutional neural network models that have facilitated this change need training images to generalize well. As a result, they often been developed for individual species meet threshold. These single‐species methods might underperform, ignore potential...
Collisions with ships (ship strikes) are a pressing conservation concern for fin whales (Balaenoptera physalus) along western North America. Fin exhibit strong diel patterns in dive behavior, remaining near the surface most of night, but how this behavior affects ship-strike risk is unknown. We combined use, habitat suitability predictions, and ship traffic data to evaluate spatial temporal trends California Current System (CCS). tested range surface-use scenarios found that both increased...
Abstract Bayesian mark‐recapture estimates of survival, abundance, and trend are reported for Cuvier's beaked whales ( Ziphius cavirostris ) using a Navy training range off southern California. The deep‐diving whale family is exceptionally vulnerable to mid‐frequency active sonar (MFAS), which has been implicated in mass strandings altered foraging behavior. Extremely low sighting probabilities impede studies population‐level impacts MFAS on whales. San Nicolas Basin hosts subject frequent...
Abstract Harbor porpoises ( Phocoena phocoena ) are the only cetaceans routinely sighted in Hood Canal, a narrow fjord that comprises western edge of Puget Sound, Washington, USA. sensitive to anthropogenic sounds, including noise from recreational and commercial vessel traffic, United States Navy, which conducts military training testing within Canal can include underwater sound sources. This study was funded as part Navy monitoring program assess potential impacts naval activities on...
Anthropogenic activities can lead to changes in animal behavior. Predicting population consequences of these behavioral requires integrating short-term individual responses into models that forecast dynamics across multiple generations. This is especially challenging for long-lived animals, because the different time scales involved. Beaked whales are a group deep-diving odontocete respond behaviorally when exposed military mid-frequency active sonar (MFAS), but effect nonlethal on beaked...
The Pacific Offshore killer whale population is currently listed as data deficient on the IUCN Red List and Threatened in Canada. estimated at 300 individuals with a range extending from Southern California to Aleutian Islands Alaska. Only 157 encounters this ecotype have been photo-documented between 1988 2014; consequently, movement behavioral are limited restricted areas commonly surveyed. To better understand movements, habitat use, diving behavior, we deployed seven dart-attached...