Search Results - "Noren, Shawn R"

Exercise at depth alters bradycardia and incidence of cardiac anomalies in deep-diving marine mammals by Williams, Terrie M., Fuiman, Lee A., Kendall, Traci, Berry, Patrick, Richter, Beau, Noren, Shawn R., Thometz, Nicole, Shattock, Michael J., Farrell, Edward, Stamper, Andy M., Davis, Randall W.

“…Unlike their terrestrial ancestors, marine mammals routinely confront extreme physiological and physical challenges while breath-holding and pursuing prey at…”
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The dive response redefined: underwater behavior influences cardiac variability in freely diving dolphins by Noren, Shawn R, Kendall, Traci, Cuccurullo, Veronica, Williams, Terrie M

“…A hallmark of the dive response, bradycardia, promotes the conservation of onboard oxygen stores and enables marine mammals to submerge for prolonged periods…”
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Extreme physiological adaptations as predictors of climate-change sensitivity in the narwhal, Monodon monoceros by Williams, Terrie M., Noren, Shawn R., Glenn, Mike

“…Rapid changes in sea ice cover associated with global warming are poised to have marked impacts on polar marine mammals. Here we examine skeletal muscle…”
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Postnatal development of diving physiology: implications of anthropogenic disturbance for immature marine mammals by Noren, Shawn R

“…Marine mammals endure extended breath-holds while performing active behaviors, which has fascinated scientists for over a century. It is now known that these…”
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Correction: Navigating under sea ice promotes rapid maturation of diving physiology and performance in beluga whales by Noren, Shawn R, Suydam, Robert

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Body Condition at Weaning Affects the Duration of the Postweaning Fast in Gray Seal Pups (Halichoerus grypus) by Noren, Shawn R., Boness, Daryl J., Iverson, Sara J., McMillan, Jim, Bowen, W. Don

“…Gray seals (Halichoerus grypus) undergo a terrestrial postweaning fast (PWF) that depletes energy reserves acquired during the suckling interval. Plasticity in…”
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Navigating under sea ice promotes rapid maturation of diving physiology and performance in beluga whales by Noren, Shawn R, Suydam, Robert

“…Little is known about the postnatal development of the physiological characteristics that support breath-hold in cetaceans, despite their need to swim and dive…”
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Development of the Blood and Muscle Oxygen Stores in Gray Seals (Halichoerus grypus): Implications for Juvenile Diving Capacity and the Necessity of a Terrestrial Postweaning Fast by Noren, Shawn R., Iverson, Sara J., Boness, Daryl J.

“…To successfully transition from nursing to foraging, phocid seal pups must develop adequate diving physiology within the limited time between birth and their…”
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Muscle biochemistry of a pelagic delphinid ( Stenella longirostris longirostris ): insight into fishery-induced separation of mothers and calves by Noren, Shawn R, West, Kristi

“…The length of time required for postnatal maturation of the locomotor muscle (longissimus dorsi) biochemistry [myoglobin (Mb) content and buffering capacity]…”
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Different Thermoregulatory Strategies in Nearly Weaned Pup, Yearling, and Adult Weddell Seals (Leptonychotes weddelli) by Noren, Shawn R., Pearson, Linnea E., Davis, Jay, Trumble, Stephen J., Kanatous, Shane B.

“…Mammals balance heat dissipation with heat production to maintain core body temperatures independent of their environment. Thermal balance is undoubtedly most…”
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Correction: Rapid maturation of the muscle biochemistry that supports diving in Pacific walruses (Odobenus rosmarus divergens) by Noren, Shawn R, Jay, Chadwick V, Burns, Jennifer M, Fischbach, Anthony S

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Mature hematology in neonatal walruses supports diving alongside their mothers by Noren, Shawn R., Edwards, Matthew S.

“…An animal's physiology limits the environmental conditions where it can persist; quantifying the physiology of the walrus is timely since they are being…”
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Rapid maturation of the muscle biochemistry that supports diving in Pacific walruses (Odobenus rosmarus divergens) by Noren, Shawn R, Jay, Chadwick V, Burns, Jennifer M, Fischbach, Anthony S

“…Physiological constraints dictate animals' ability to exploit habitats. For marine mammals, it is important to quantify physiological limits that influence…”
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Pregnancy is a drag: hydrodynamics, kinematics and performance in pre- and post-parturition bottlenose dolphins (Tursiops truncatus) by Noren, Shawn R, Redfern, Jessica V, Edwards, Elizabeth F

“…Constraints on locomotion could be an important component of the cost of reproduction as carrying an increased load associated with eggs or developing fetuses…”
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Assessment of legacy and emerging persistent organic pollutants in Weddell seal tissue (Leptonychotes weddellii) near McMurdo Sound, Antarctica by Trumble, Stephen J., Robinson, Eleanor M., Noren, Shawn R., Usenko, Sascha, Davis, Jay, Kanatous, Shane B.

“…Muscle samples were collected from pup, juvenile and adult Weddell seals (Leptonychotes weddellii) near McMurdo Sound, Antarctica during the austral summer of…”
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Body Growth and Rapid Hematological Development Support Breath Hold of Baby Belugas (Delphinapterus leucas) during Subice Transit by Noren, Shawn R., Poll, Caryn P., Edwards, Matthew S.

“…Body size and oxygen stores in the blood and muscle set breath-hold limits in marine mammals, yet these characteristics are understudied in immature cetaceans…”
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Energy Demands for Maintenance, Growth, Pregnancy, and Lactation of Female Pacific Walruses (Odobenus rosmarus divergens) by Noren, Shawn R., Udevitz, Mark S., Jay, Chadwick V.

“…Decreases in sea ice have altered habitat use and activity patterns of female Pacific walrusesOdobenus rosmarus divergensand could affect their energetic…”
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Living in the fast lane: rapid development of the locomotor muscle in immature harbor porpoises (Phocoena phocoena) by Noren, Shawn R., Noren, Dawn P., Gaydos, Joseph K.

“…Cetaceans (dolphins and whales) are born into the aquatic environment and are immediately challenged by the demands of hypoxia and exercise. This should…”
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Identifying a reliable blubber measurement site to assess body condition in a marine mammal with topographically variable blubber, the Pacific walrus by Noren, Shawn R., Udevitz, Mark S., Triggs, Lisa, Paschke, Jessa, Oland, Lisa, Jay, Chadwick V.

“…Pacific walruses may be unable to meet caloric requirements in the changing Arctic ecosystem, which could affect body condition and have population‐level…”
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Ontogeny of swim performance and mechanics in bottlenose dolphins (Tursiops truncatus) by Noren, Shawn R, Biedenbach, George, Edwards, Elizabeth F

“…Morphological and physiological development impacts swimming performance throughout ontogeny. Our investigation of the ontogeny of swim performance (mean and…”
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