... for correspondence: jkhudyakov@pacific.edu 31 8 2023 14 11 2023 © 2023. Published by The Company of Biologists Ltd 2023 http://www.biologists.com/user-licence-1-1/ FKBP5 HSD11B2 Glucocorticoid receptor Marine mammal Negative feedback Stress Intracellular negative feedback...

... 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...

.... Spirometry End-expired gas Breathing frequency Tidal volume Marine mammal Diving physiology Marine mammals forage underwater but need to return to the surface to replenish O 2 stores and to remove the CO 2 produced during dives. While holding their breath underwater, they use the O 2...

...) and summarized within the context of other recent studies using CEEs to study behavioral responses of marine mammals to sonar by Southall et al. (2016) . Essentially, a standard before–during–after (A–B–A) experimental design (with 30 min phases for up to a total of a 90 min full experimental sequence) was used...

..., 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...

... Hydrodynamic sensory system Marine mammal Pinnipeds Sensory biology All pinnipeds possess well-developed vibrissae ( Ling, 1966 ; Stephens et al., 1973 ; Dykes, 1975 ; Ling, 1977 ). This sensory specialisation enables the perception of haptic information ( Kastelein and van Gaalen, 1988...

... 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...

... lions. Use of a stroke–glide strategy also contributes to minimization of work effort. Diving physiology Flipper stroke rate Marine mammal Venous oxygen Optimal management of oxygen stores underlies the breath-hold capacity of air-breathing divers. The utilization of oxygen stores...

... 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...

... comparisons were used to form groupings of statistically indistinguishable Mb oxygen affinity. For assistance in acquiring muscle samples, we thank the Texas Marine Mammal Stranding Network, SeaWorld San Diego, The New England Aquarium, The Museum of the North, The Alaska SeaLife Center, Moody Gardens...

... 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...

... Marine mammal Cetacean Odontocete Arctic Beluga whales, Delphinapterus leucas (Pallas 1776), are often found in turbid, coastal waters in northern latitudes where darkness can extend for many months. They depend upon sound for many important biological functions such as foraging, navigation...