..., we introduced two non-invasive and easy-to-operate methods based on photoplethysmography, namely reflectance-type photoplethysmography (PPG) and remote photoplethysmography (rPPG), which we applied to the large yellow croaker ( Larimichthys crocea ). PPG showed perfect synchronization...

... physiological stress indicators, which can be measured non-invasively using infrared thermal imaging, overcoming many limitations of current methods. Nonetheless, which aspects of stress physiology they represent remains unclear, as the underlying mechanisms are unknown. To date, validations have primarily...

... quail were detected and are considered to reflect baroreflex mediation of f H and respiratory sinus arrhythmia, respectively. * e-mail: [email protected] 13 1 1998 5 3 1998 © 1998 The Company of Biologists Limited 1998 non-invasive heart rate...

... study we have systematically studied these potential sources of error under a variety of conditions and describe a technique for eliminating these errors in routine measurements. 16 07 1986 © 1986 by Company of Biologists 1986 methods tidal volume non-invasive aquatic air...