Field Physiology: Studying Organismal Function in the Natural Environment

Williams, C. L.; Hindle, Allyson G.

doi:10.1002/cphy.c200005

Cited by 9 publications

(4 citation statements)

References 334 publications

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“…We recently demonstrated the utility of CW-NIRS in voluntarily diving seals and breath-hold diving humans performing deep dives (>100 m) ( McKnight et al, 2019 , 2021a , b ). Thus, this technology promises to open new avenues for physiological research in free-ranging animals, as highlighted in a number of recent physio-logging reviews ( Fahlman et al, 2021a ; Ponganis, 2021 ; Williams et al, 2021 ; Williams and Hindle, 2021 ; Williams and Ponganis, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Near-Infrared Spectroscopy as a Tool for Marine Mammal Research and Care

Ruesch

McKnight

Fahlman³

et al. 2022

Front. Physiol.

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Developments in wearable human medical and sports health trackers has offered new solutions to challenges encountered by eco-physiologists attempting to measure physiological attributes in freely moving animals. Near-infrared spectroscopy (NIRS) is one such solution that has potential as a powerful physio-logging tool to assess physiology in freely moving animals. NIRS is a non-invasive optics-based technology, that uses non-ionizing radiation to illuminate biological tissue and measures changes in oxygenated and deoxygenated hemoglobin concentrations inside tissues such as skin, muscle, and the brain. The overall footprint of the device is small enough to be deployed in wearable physio-logging devices. We show that changes in hemoglobin concentration can be recorded from bottlenose dolphins and gray seals with signal quality comparable to that achieved in human recordings. We further discuss functionality, benefits, and limitations of NIRS as a standard tool for animal care and wildlife tracking for the marine mammal research community.

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Section: Introductionmentioning

confidence: 99%

Near-Infrared Spectroscopy as a Tool for Marine Mammal Research and Care

Ruesch

McKnight

Fahlman³

et al. 2022

Front. Physiol.

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“…For example, BCGs extracted from gliding phases before and after controlled sonar exposure experiments could quantify the physiological response to anthropogenic disturbance ( Southall et al, 2019 ). Even as the field of physio-logging progresses with new hardware innovations ( Fahlman et al, 2021 ; Hawkes et al, 2021 ; Williams and Hindle, 2021 ), this method demonstrates that computational advances can derive new insights from traditional sensors.…”

Section: Resultsmentioning

confidence: 99%

“…Recent advances in physio-logging (recording physiological variables using animal-borne devices) have largely been driven by new developments in sensor technology ( Hawkes et al, 2021 ; Williams and Hindle, 2021 ). For example, new physio-logging tags can detect regional changes in blood flow by incorporating functional near-infrared spectroscopy sensors ( McKnight et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

An accelerometer-derived ballistocardiogram method for detecting heart rate in free-ranging marine mammals

Czapanskiy

Ponganis

Fahlbusch

et al. 2022

Journal of Experimental Biology

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Physio-logging methods, which use animal-borne devices to record physiological variables, are entering a new era driven by advances in sensor development. However, existing datasets collected with traditional bio-loggers, such as accelerometers, still contain untapped eco-physiological information. Here we present a computational method for extracting heartrate from high-resolution accelerometer data using a ballistocardiogram. We validated our method with simultaneous accelerometer-electrocardiogram tag deployments in a controlled setting on a killer whale (Orcinus orca) and demonstrate the predictions correspond with previously observed cardiovascular patterns in a blue whale (Balaenoptera musculus), including the magnitude of apneic bradycardia and increase in heart rate prior to and during ascent. Our ballistocardiogram method may be applied to mine heart rates from previously collected accelerometery and expand our understanding of comparative cardiovascular physiology.

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“…This mini-review is not intended to be a comprehensive examination of diving physiology or of the development and application of various physio-logging devices and techniques. For such information, readers are referred to prior publications ( Butler and Jones, 1997 ; Kooyman and Ponganis, 1998 ; Weimerskirch et al, 2000 ; Ropert-Coudert et al, 2006 ; Ponganis, 2007 ; Sakamoto et al, 2013 ; Davis, 2014 ; Williams and Ponganis, 2021 ; Williams and Hindle, 2021 ). In those reviews and papers, the works of Butler and Woakes, Kanwisher, Fedak, Hill and Zapol, Andrews and Jones, Weimerkirsch, Ropert-Coudert, K. Sakamoto, T. Williams, and M. Johnson are relevant to the development of heart rate physio-logging techniques and recorders in many different marine mammals and seabirds.…”

Section: Introductionmentioning

confidence: 99%

A Physio-Logging Journey: Heart Rates of the Emperor Penguin and Blue Whale

Ponganis

2021

Front. Physiol.

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Physio-logging has the potential to explore the processes that underlie the dive behavior and ecology of marine mammals and seabirds, as well as evaluate their adaptability to environmental change and other stressors. Regulation of heart rate lies at the core of the physiological processes that determine dive capacity and performance. The bio-logging of heart rate in unrestrained animals diving at sea was infeasible, even unimaginable in the mid-1970s. To provide a historical perspective, I review my 40-year experience in the development of heart rate physio-loggers and the evolution of a digital electrocardiogram (ECG) recorder that is still in use today. I highlight documentation of the ECG and the interpretation of heart rate profiles in the largest of avian and mammalian divers, the emperor penguin and blue whale.

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Field Physiology: Studying Organismal Function in the Natural Environment

Cited by 9 publications

References 334 publications

Near-Infrared Spectroscopy as a Tool for Marine Mammal Research and Care

Near-Infrared Spectroscopy as a Tool for Marine Mammal Research and Care

An accelerometer-derived ballistocardiogram method for detecting heart rate in free-ranging marine mammals

A Physio-Logging Journey: Heart Rates of the Emperor Penguin and Blue Whale

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