... of their tissues to cortisol in response to acute stress during prolonged fasting. FKBP5 HSD11B2 Glucocorticoid receptor Marine mammal Negative feedback Stress University of the Pacific http://dx.doi.org/10.13039/100009841 US Department of Defense RC20-C2-1284...

... and encoded has previously only been described in insects, fish, birds, reptiles and terrestrial mammals. The present study aimed to provide insight into how a marine mammal, the harbour seal, encodes goals relative to landmarks. In our expansion test, three harbour seals were trained to find a goal inside...

...Rebecca Rimbach; Ahmad Amireh; Austin Allen; Brian Hare; Emily Guarino; Chana Kaufman; Hannah Salomons; Herman Pontzer ABSTRACT Marine mammals are thought to have an energetically expensive lifestyle because endothermy is costly in marine environments. However, measurements of total energy...

...Arlo Adams; Wayne Vogl; Camilla Dawson; Stephen Raverty; Martin Haulena; Stacey A. Skoretz ABSTRACT Effective ‘valving’ in the upper aerodigestive tract (UAT) is essential to temporarily separate the digestive and respiratory pathways. Marine mammals are largely dedicated to feeding underwater...

...Michael Denk; Andreas Fahlman; Sophie Dennison-Gibby; Zhongchang Song; Michael Moore ABSTRACT Assessment of the compressibility of marine mammal airways at depth is crucial to understanding vital physiological processes such as gas exchange during diving. Very few studies have directly assessed...

...Kaori Yoshino; Akinori Takahashi; Taiki Adachi; Daniel P. Costa; Patrick W. Robinson; Sarah H. Peterson; Luis A. Hückstädt; Rachel R. Holser; Yasuhiko Naito ABSTRACT Knowledge of the diet of marine mammals is fundamental to understanding their role in marine ecosystems and response to environmental...

... diving to depth and breathing while swimming is reduced. New methods are being developed that may help estimation of f R and V T in free-ranging marine mammals ( Cauture et al., 2019 ; Sumich, 2001 ; van der Hoop et al., 2014 ). These may contribute to our understanding of respiratory effort...

..., including behavioral state, proximity and prey. Sonar Marine mammal Behavioral state Foraging ecology Endangered Context Sound production and reception are centrally important in the life history of all marine mammals, and their responses to natural signals as well as human noise can have...

..., little is known about the feeding behaviors used by many marine mammals. We characterized the feeding behaviors and associated kinematics of captive bearded ( Erignathus barbatus ), harbor ( Phoca vitulina ), ringed ( Pusa hispida ) and spotted ( Phoca largha ) seals through controlled feeding trials...

... auditory data for a population of healthy wild odontocetes shows that belugas have sensitive hearing with limited hearing loss and thresholds that approach quiet ambient noise conditions. Noise Marine mammal Cetacean Odontocete Arctic Underwater hearing and sound production are of primary...

... . Aust. J. Zool.   14 , 855 - 866 . 10.1071/ZO9660855 Ling , J. K. ( 1977 ). Vibrissae of marine mammals . In Functional Anatomy of Marine Mammals (ed. R. J.   Harrison ), pp. 387 - 415 . London : Academic Press . Mills , A. W. ( 1958 ). On the minimum audible angle...

... during dives? The ultra-deep diving feats of some marine mammals defy our current understanding of respiratory physiology and lung mechanics. These animals cope daily with lung compression, alveolar collapse, transient hyperoxia and extreme hypoxia. By improving our understanding of respiratory...

...Louise Day; Joffrey Jouma'a; Julien Bonnel; Christophe Guinet ABSTRACT Measuring physiological data in free-ranging marine mammals remains challenging, owing to their far-ranging foraging habitat. Yet, it is important to understand how these divers recover from effort expended underwater, as marine...

...Shawn R. Noren; Kristi West ABSTRACT The length of time required for postnatal maturation of the locomotor muscle (longissimus dorsi) biochemistry [myoglobin (Mb) content and buffering capacity] in marine mammals typically varies with nursing duration, but it can be accelerated by species-specific...

... the manuscript. B.I.M. and L.A.H. edited the manuscript. Funding This work was supported by Office of Naval Research grant N000141410404. References Davis , R. W. and Williams , T. M. ( 2012 ). The marine mammal dive response is exercise modulated to maximize aerobic dive duration...

... with a high myoglobin content that matures rapidly. Myoglobin Muscle acid buffering capacity Diving capacity Marine mammal Cetacean Arctic North Pacific Research Board 1406 North Slope Borough Over evolutionary time, the locomotor muscles of aquatic birds...

...://creativecommons.org/licenses/by/3.0 ), which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed. Summary: A step-wise filtering method to detect buoyancy changes in drift diving pinnipeds. Body condition Marine mammal Elephant...

... © 2015. Published by The Company of Biologists Ltd 2015 Summary: Myoglobin oxygen affinity varies among terrestrial and aquatic birds and mammals, with long-duration diving species having greater myoglobin oxygen affinity. Aerobic dive limit Marine mammal Hypoxia Molecular evolution...

... concentrations of carboxyhemoglobin (COHb), formed by CO binding to hemoglobin, potentially prevent adequate O 2 delivery to tissues by lowering arterial O 2 content. Elevated heme-protein concentrations, as found in marine mammals, are likely associated with greater heme degradation, more endogenous CO...

... interests The authors declare no competing financial interests. 1 7 2013 21 1 2014 © 2014. Published by The Company of Biologists Ltd 2014 Noise Marine mammal Cetacean Odontocete Arctic Beluga whales, Delphinapterus leucas (Pallas 1776), are often found in turbid...