Search Results - "Huckstadt, Luis A."

What difference does a century make? Shifts in the ecosystem structure of the Ross Sea, Antarctica, as evidenced from a sentinel species, the Weddell seal by Hückstädt, Luis A., McCarthy, Matthew D., Koch, Paul L., Costa, Daniel P.

“…The arrival of humans to Antarctica's Ross Sea (100+ years ago) led to a slow, but sustained increase in human activities in the area. To investigate if human…”
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Intrinsic anti-inflammatory properties in the serum of two species of deep-diving seal by Bagchi, Aranya, Batten, Annabelle J, Levin, Milton, Allen, Kaitlin N, Fitzgerald, Michael L, Hückstädt, Luis A, Costa, Daniel P, Buys, Emmanuel S, Hindle, Allyson G

“…Weddell and elephant seals are deep diving mammals, which rely on lung collapse to limit nitrogen absorption and prevent decompression injury. Repeated…”
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Estimates of the Southern Ocean general circulation improved by animal-borne instruments by Roquet, Fabien, Wunsch, Carl, Forget, Gael, Heimbach, Patrick, Guinet, Christophe, Reverdin, Gilles, Charrassin, Jean-Benoit, Bailleul, Frederic, Costa, Daniel P., Huckstadt, Luis A., Goetz, Kimberly T., Kovacs, Kit M., Lydersen, Christian, Biuw, Martin, Nøst, Ole A., Bornemann, Horst, Ploetz, Joachim, Bester, Marthan N., McIntyre, Trevor, Muelbert, Monica C., Hindell, Mark A., McMahon, Clive R., Williams, Guy, Harcourt, Robert, Field, Iain C., Chafik, Leon, Nicholls, Keith W., Boehme, Lars, Fedak, Mike A.

“…Over the last decade, several hundred seals have been equipped with conductivity‐temperature‐depth sensors in the Southern Ocean for both biological and…”
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Anterior vena caval oxygen profiles in a deep-diving California sea lion: arteriovenous shunts, a central venous oxygen store and oxygenation during lung collapse by Tift, Michael S, Hückstädt, Luis A, Ponganis, Paul J

“…Deep-diving California sea lions ( ) can maintain arterial hemoglobin saturation ( ) above 90% despite lung collapse (lack of gas exchange) and extremely low…”
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Flipper stroke rate and venous oxygen levels in free-ranging California sea lions by Tift, Michael S, Hückstädt, Luis A, McDonald, Birgitte I, Thorson, Philip H, Ponganis, Paul J

“…The depletion rate of the blood oxygen store, development of hypoxemia and dive capacity are dependent on the distribution and rate of blood oxygen delivery to…”
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Stroke effort and relative lung volume influence heart rate in diving sea lions by McDonald, Birgitte I, Tift, Michael S, Hückstädt, Luis A, Jeffko, Michael, Ponganis, Paul J

“…The dive response, bradycardia (decreased heart rate) and peripheral vasoconstriction, is the key mechanism allowing breath-hold divers to perform…”
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Regional variability in diving physiology and behavior in a widely distributed air-breathing marine predator, the South American sea lion (Otaria byronia) by Hückstädt, Luis A, Tift, Michael S, Riet-Sapriza, Federico, Franco-Trecu, Valentina, Baylis, Alastair M M, Orben, Rachael A, Arnould, John P Y, Sepulveda, Maritza, Santos-Carvallo, Macarena, Burns, Jennifer M, Costa, Daniel P

“…Our understanding of how air-breathing marine predators cope with environmental variability is limited by our inadequate knowledge of their ecological and…”
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The extra burden of motherhood: reduced dive duration associated with pregnancy status in a deep-diving mammal, the northern elephant seal by Hückstädt, Luis A., Holser, Rachel R., Tift, Michael S., Costa, Daniel P.

“…The cost of pregnancy is hard to study in marine mammals, particularly in species that undergo pregnancy while diving continuously at sea such as elephant…”
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Night diving by some emperor penguins during the winter breeding period at Cape Washington by Kooyman, Gerald L, van Dam, Robert P, Hückstädt, Luis A

“…All through the bird literature and feature films, there is much ado about dedicated emperor penguin males fasting for 115 days while they do all the…”
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Seals and sea lions are what they eat, plus what? Determination of trophic discrimination factors for seven pinniped species by Beltran, Roxanne S., Peterson, Sarah H., McHuron, Elizabeth A., Reichmuth, Colleen, Hückstädt, Luis A., Costa, Daniel P.

“…Rationale Mixing models are a common method for quantifying the contribution of prey sources to the diet of an individual using stable isotope analysis;…”
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Influence of hunting strategy on foraging efficiency in Galapagos sea lions by Blakeway, Jessica-Anne, Arnould, John P Y, Hoskins, Andrew J, Martin-Cabrera, Patricia, Sutton, Grace J, Huckstadt, Luis A, Costa, Daniel P, Páez-Rosas, Diego, Villegas-Amtmann, Stella

“…The endangered Galapagos sea lion (GSL, ) exhibits a range of foraging strategies utilising various dive types including benthic, epipelagic and mesopelagic…”
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Latitudinal range influences the seasonal variation in the foraging behavior of marine top predators by Villegas-Amtmann, Stella, Simmons, Samantha E, Kuhn, Carey E, Huckstadt, Luis A, Costa, Daniel P

“…Non-migratory resident species should be capable of modifying their foraging behavior to accommodate changes in prey abundance and availability associated with…”
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An animal-borne active acoustic tag for minimally invasive behavioral response studies on marine mammals by Fregosi, Selene, Klinck, Holger, Horning, Markus, Costa, Daniel P, Mann, David, Sexton, Kenneth, Huckstadt, Luis A, Mellinger, David K, Southall, Brandon L

“…Background There is a variety of evidence that increased anthropogenic noise (e.g., shipping, explosions, sonar) has a measureable effect on marine mammal…”
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Acceleration-triggered animal-borne videos show a dominance of fish in the diet of female northern elephant seals by Yoshino, Kaori, Takahashi, Akinori, Adachi, Taiki, Costa, Daniel P, Robinson, Patrick W, Peterson, Sarah H, Hückstädt, Luis A, Holser, Rachel R, Naito, Yasuhiko

“…Knowledge of the diet of marine mammals is fundamental to understanding their role in marine ecosystems and response to environmental change. Recently,…”
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Dive descent rate as a buoyancy indicator to infer body condition of Weddell seals in the Antarctic by Yong, Chuanji, Harcourt, Robert, McMahon, Clive R., Costa, Daniel P., Huckstadt, Luis A., Hindell, Mark, Jonsen, Ian

“…Changes in buoyancy of marine mammals can be used to infer environmental changes. In multiple seal species, how “fast” an animal sinks reveals body condition…”
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Whiskers as hydrodynamic prey sensors in foraging seals by Adachi, Taiki, Naito, Yasuhiko, Robinson, Patrick W, Costa, Daniel P, Hückstädt, Luis A, Holser, Rachel R, Iwasaki, Wataru, Takahashi, Akinori

“…The darkness of the deep ocean limits the vision of diving predators, except when prey emit bioluminescence. It is hypothesized that deep-diving seals rely on…”
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Projected shifts in the foraging habitat of crabeater seals along the Antarctic Peninsula by Hückstädt, Luis A., Piñones, Andrea, Palacios, Daniel M., McDonald, Birgitte I., Dinniman, Michael S., Hofmann, Eileen E., Burns, Jennifer M., Crocker, Daniel E., Costa, Daniel P.

“…Crabeater seals exhibit extreme dietary specialization, feeding almost exclusively on Antarctic krill. This specialization has inextricably linked habitat use,…”
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Chlorophyll fluorescence as measured in situ by animal-borne instruments in the northeastern Pacific Ocean by Keates, Theresa R., Kudela, Raphael M., Holser, Rachel R., Hückstädt, Luis A., Simmons, Samantha E., Costa, Daniel P.

“…Chlorophyll concentration in the ocean is a metric for phytoplankton biomass, which forms the base of most pelagic food webs and is a critical component of the…”
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A Dynamic State Model of Migratory Behavior and Physiology to Assess the Consequences of Environmental Variation and Anthropogenic Disturbance on Marine Vertebrates by Pirotta, Enrico, Mangel, Marc, Costa, Daniel P., Mate, Bruce, Goldbogen, Jeremy A., Palacios, Daniel M., Hückstädt, Luis A., McHuron, Elizabeth A., Schwarz, Lisa, New, Leslie

“…Integrating behavior and physiology is critical to formulating new hypotheses on the evolution of animal life-history strategies. Migratory capital breeders…”
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Scaling up ocean conservation through recognition of key biodiversity areas in the Southern Ocean from multispecies tracking data by Becker, Sarah L, Boyd, Charlotte, Handley, Jonathan M, Raymond, Ben, Reisinger, Ryan, Ropert-Coudert, Yan, Apelgren, Nora, Davies, Tammy E, Lea, Mary-Anne, Santos, Mercedes, Trathan, Philip N, Van de Putte, Anton P, Huckstadt, Luis A, Charrassin, Jean-Benoit, Brooks, Cassandra M

“…Biodiversity is critical for maintaining ecosystem function but is threatened by increasing anthropogenic pressures. In the Southern Ocean, a highly…”
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