.... Active buoyancy control Baleen whale Cetacean Mother–calf Respiratory system Swimming behavior IDEX Paris-Saclay ANR-11-IDEX-0003-02 Centre National de la Recherche Scientifique http://dx.doi.org/10.13039/501100004794 Cétamada association Western Indian...

... of flexion of the flukes may indicate active control of fluke stiffness in combination with the arrangement and mechanical properties of the constituent collagen fibers. The issue of whether flexibility of the flukes of cetaceans is purely passive or has some contribution of an active mechanism...

... Summary: Estimation of bottlenose dolphin swimming effort using a physics-based energetics model shows dolphins moderate propulsive efficiency through speed and depth regulation, dependent on task effort requirements. Biologging Cetacean Efficiency Locomotion Kinematics Office of Naval...

... unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed. Highlighted Article: Validation of a computational method for extracting heart rate in free-ranging cetaceans from high-resolution accelerometer data using a ballistocardiogram...

..., but larger whales maneuver better than expected. Maneuverability Agility Scaling Cetacean Swimming National Science Foundation http://dx.doi.org/10.13039/100000001 IOS-1656691 ANT-0739483 OPP-1643877 DBI-1624645 07-39483 OPP-1644209 IOS-1656656 IOS-1656676 SMP 1011707...

... to build energy budgets, and investigate the costs of diving in free-ranging animals where bio-logging data are available. We propose that a similar approach could be applied to other cetacean species. Some individuals reached higher steady-state activity levels than others ( Fig. 4 ), which...

...-ratio lifting surfaces has evolved in many vertebrate lineages, from fish to cetaceans. Baleen whales (Mysticeti) are the largest swimming animals that exhibit this locomotor strategy, and present an ideal study system to examine how morphology and the kinematics of swimming scale to the largest body...

..., cardiorespiratory system and other attributes of diving physiology for pinnipeds and cetaceans to assess how physiological immaturity makes young marine mammals vulnerable to disturbance. Generally, the duration required for body oxygen stores to mature varies across species in accordance with the maternal...

...Lewis G. Halsey; Gil Iosilevskii ABSTRACT Displays of maximum swimming speeds are rare in the laboratory and the wild, limiting our understanding of the top-end athletic capacities of aquatic vertebrates. However, jumps out of the water – exhibited by a diversity of fish and cetaceans – might...

...Ida M. Kragh; Katherine McHugh; Randall S. Wells; Laela S. Sayigh; Vincent M. Janik; Peter L. Tyack; Frants H. Jensen ABSTRACT Anthropogenic underwater noise has increased over the past century, raising concern about the impact on cetaceans that rely on sound for communication, navigation...

... drivers of diving and surfacing heart rate in cetaceans whose faces are always mostly submerged. Using two trained harbour porpoises instrumented with an ECG-measuring sound-and-movement tag (DTAG-3), we investigated the initiation and progression of bradycardia and tachycardia during apnoea and eupnoea...

...-licence-1-1/ Summary: The relationship between body condition and blood and muscle O 2 stores in beluga whales may represent a vicious cycle, in which decreases in condition impair foraging ability, leading to further reductions in condition. Arctic climate change Cetacean Aerobic dive...

... ; paradoxically, with the hypothetical stopping of the heart and consequent absence of beat, there will be 100% reduction of blood flow and the blood flow deficit will be equal to the blood flow rate at 100 beats min −1 . Here, we emphasize that the narwhal and other potentially other deep-diving cetaceans may...

... metabolic output. We investigated the locomotor muscle morphology and metabolism of this cetacean to determine whether its muscle profile (1) explains this unique swimming performance and feeding behaviour, (2) is or is not homogeneous within the muscle, and (3) predicts allometric variations inherent...

...T. Aran Mooney; Manuel Castellote; Lori Quakenbush; Roderick Hobbs; Eric Gaglione; Caroline Goertz ABSTRACT Documenting hearing abilities is vital to understanding a species’ acoustic ecology and for predicting the impacts of increasing anthropogenic noise. Cetaceans use sound for essential...

... intensely in pinnipeds, but comparatively little is known for cetaceans, in particular in ecologically relevant settings. Here, we studied the dive f H response in one of the smallest cetaceans, the harbour porpoise ( Phocoena phocoena ). We used a novel multi-sensor data logger to record dive behaviour, f...

... (median, 0.0035) to that in other cetaceans, indicated greater basal metabolic costs during diving than for other cetaceans. This could explain the comparatively short duration (8.9±1.5 min) of their deep dives (maximum depth, 444±85 m). Hydrodynamic gliding models indicated negative buoyancy of tissue...

..., it promotes enhanced muscle biochemistry: newborn and adult spinner dolphins had four- and two-times greater Mb contents than newborn and adult bottlenose dolphins, respectively. Indeed, adult levels rivaled those of deep-diving cetaceans. Nonetheless, the relatively underdeveloped muscle biochemistry...

...Shawn R. Noren; Robert Suydam ABSTRACT Little is known about the postnatal development of the physiological characteristics that support breath-hold in cetaceans, despite their need to swim and dive at birth. Arctic species have the additional demand of avoiding entrapment while navigating under...

...Marjoleine M. H. Roos; Gi-Mick Wu; Patrick J. O. Miller ABSTRACT Respiration rate has been used as an indicator of metabolic rate and associated cost of transport (COT) of free-ranging cetaceans, discounting potential respiration-by-respiration variation in O 2 uptake. To investigate the influence...