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Keywords: diving
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Journal Articles
J Exp Biol (2021) 224 (23): jeb242993.
Published: 9 December 2021
...Alicia Borque-Espinosa; Karyn D. Rode; Diana Ferrero-Fernández; Anabel Forte; Romana Capaccioni-Azzati; Andreas Fahlman ABSTRACT Walruses rely on sea-ice to efficiently forage and rest between diving bouts while maintaining proximity to prime foraging habitat. Recent declines in summer sea ice have...
Includes: Supplementary data
Journal Articles
J Exp Biol (2021) 224 (15): jeb237628.
Published: 6 August 2021
... latirostris ) reside exclusively in tropical or subtropical waters. Although potentially providing an energetic benefit through reduced maintenance and thermal costs, little is known about the cascading effects that may alter energy expenditure during activity, dive responses and overall energy budgets...
Journal Articles
J Exp Biol (2021) 224 (12): jeb242512.
Published: 16 June 2021
... foraging sites, they have to develop effective prey search patterns and physiological capacities that enable them to capture sufficient prey to meet their energetic needs. Animals that dive to forage, such as king penguins ( Aptenodytes patagonicus ), need to acquire an adequate breath-hold capacity...
Journal Articles
J Exp Biol (2019) 222 (13): jeb201285.
Published: 2 July 2019
...Anthony B. Lapsansky; Bret W. Tobalske ABSTRACT Alcids, a family of seabirds including murres, guillemots and puffins, exhibit the greatest mass-specific dive depths and durations of any birds or mammals. These impressive diving capabilities have motivated numerous studies on the biomechanics...
Journal Articles
J Exp Biol (2019) 222 (8): jeb200824.
Published: 24 April 2019
...Cassondra L. Williams; Katsufumi Sato; Paul J. Ponganis ABSTRACT Marine turtles spend their life at sea and can rest on the seafloor for hours. As air-breathers, the breath-hold capacity of marine turtles is a function of oxygen (O 2 ) stores, O 2 consumption during dives and hypoxia tolerance...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (6): jeb199828.
Published: 21 March 2019
... contraction with wortmannin (10 µmol l −1 perfusion) approximately doubled baseline stroke volume and cardiac output. We suggest that atrial smooth muscle provides a unique mechanism to control cardiac filling that could be involved in the regulation of stroke volume during diving. There was no change (from...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (13): jeb182170.
Published: 1 July 2018
.... Foraging Little auks Copepods Diving Climate change Feeding mechanism Trophic flow and food web architecture are conditioned by prey capture techniques ( Garvey and Whiles, 2016 ). In the marine environment, many predators use raptorial feeding, seizing prey items individually, yet the largest...
Includes: Supplementary data
Journal Articles
J Exp Biol (2018) 221 (11): jeb166033.
Published: 12 June 2018
... foraging mechanisms and extremely large body size to exploit unique ecological niches in the ocean. Scaling Odontocetes Mysticetes Diving Filter feeding Echolocation Researchers have long recognized the importance of body size in biology. The influence of scale is omnipresent throughout...
Journal Articles
J Exp Biol (2017) 220 (14): 2666–2678.
Published: 15 July 2017
...Manfred R. Enstipp; Charles-André Bost; Céline Le Bohec; Caroline Bost; Yvon Le Maho; Henri Weimerskirch; Yves Handrich ABSTRACT Little is known about the early life at sea of marine top predators, like deep-diving king penguins ( Aptenodytes patagonicus ), although this dispersal phase is probably...
Journal Articles
J Exp Biol (2017) 220 (10): 1875–1881.
Published: 15 May 2017
... its validity during diving, in diving endotherms. Here, we simultaneously deployed accelerometers and heart rate loggers in a wild population of European shags ( Phalacrocorax aristotelis ). Existing calibration relationships were then used to make behaviour-specific estimates of energy expenditure...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (6): 1135–1145.
Published: 15 March 2017
... whale, a deep-diving odontocete considered especially sensitive to disturbance. By integrating energetics with swimming behavior and dive characteristics, this study demonstrates the physiological consequences of oceanic noise on diving mammals, and provides a powerful tool for predicting the biological...
Journal Articles
J Exp Biol (2016) 219 (22): 3616–3625.
Published: 15 November 2016
...Cassondra L. Williams; James W. Hicks ABSTRACT Mammals and birds maintain high arterial partial pressure of oxygen ( P O 2 ) values in order to preserve near-complete hemoglobin (Hb) oxygen (O 2 ) saturation. In diving mammals and birds, arterial O 2 follows a primarily monotonic decline...
Includes: Supplementary data
Journal Articles
J Exp Biol (2016) 219 (15): 2320–2330.
Published: 1 August 2016
... plasticity of a marine predator in different environments. We measured the oxygen stores and diving behavior of South American sea lions throughout most of its range, allowing us to demonstrate that diving ability and behavior vary across its range. We found no significant differences in mass-specific blood...
Includes: Supplementary data
Journal Articles
J Exp Biol (2015) 218 (13): 2116–2123.
Published: 1 July 2015
... on patch quality and travel time shows that for Manx shearwaters combining chick feeding and self-maintenance, bimodal foraging trip durations optimise feeding rates. Foraging strategy Puffinus puffinus Bio-logging GPS Diving Resource allocation between parents and their offspring...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (13): 2331–2337.
Published: 1 July 2014
... of Biologists Ltd 2014 Endothermy Dermochelys coriacea Jellyfish Diving Reptile Specific dynamic action Adult leatherbacks typically weigh 250–600 kg, and a small surface area-to-volume ratio combined with extensive fat deposits beneath the shell and throughout the head and neck region...
Journal Articles
J Exp Biol (2014) 217 (7): 1154–1166.
Published: 1 April 2014
...Colby Moore; Michael Moore; Stephen Trumble; Misty Niemeyer; Betty Lentell; William McLellan; Alexander Costidis; Andreas Fahlman In 1940, Scholander suggested that stiffened upper airways remained open and received air from highly compressible alveoli during marine mammal diving. There are few...
Journal Articles
J Exp Biol (2013) 216 (24): 4639–4646.
Published: 15 December 2013
... to the larynx. Toothed cetaceans (Odontoceti) are capable of producing sounds at depth, either for locating prey or for communication. It has been suggested that during dives, air from the lungs and upper respiratory tract can be moved to the vestibular and nasal cavities to permit sound generation to continue...
Journal Articles
J Exp Biol (2013) 216 (18): 3385–3387.
Published: 15 September 2013
... of the blood through the arterial retia. Formation of nitrogen bubbles that may reach the brain is thereby avoided. We also suggest that mass stranding of whales may be due to disturbances to their normal dive profiles, resulting in extra release of nitrogen that may overburden the nitrogen ‘trap’ and allow...
Journal Articles
J Exp Biol (2013) 216 (14): 2548–2563.
Published: 15 July 2013
... of tissues to respond to rapid changes in ambient ocean pressures during a dive. We tested this hypothesis by measuring arterial mechanics experimentally and modelling arterial transmural pressures mathematically. The mechanical properties of mammalian arteries reflect the physiological loads they experience...
Journal Articles
J Exp Biol (2013) 216 (10): 1793–1798.
Published: 15 May 2013
...Samuel J. Geiseler; Arnoldus S. Blix; Jennifer M. Burns; Lars P. Folkow SUMMARY Hooded seals ( Cystophora cristata ) rely on large stores of oxygen, either bound to hemoglobin or myoglobin (Mb), to support prolonged diving activity. Pups are born with fully developed hemoglobin stores, but their Mb...