northern elephant seal
Acutely elevated vasopressin increases circulating concentrations of cortisol and aldosterone in fasting northern elephant seal (Mirounga angustirostris) pups
... the northern elephant seal Mirounga angustirostris undergo a 2–3 month fast, during which time they abstain from drinking seawater and are able to maintain their water balance by conserving the water ...
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Terrestrial locomotion of the northern elephant seal (Mirounga angustirostris): limitation of large aquatically adapted seals on land?
... amphibious northern elephant seal, Mirounga angustirostris, is the second largest phocid seal in the world, with males reaching 2700 ...Although elephant seals are proficient swimmers ...
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Activation of systemic, but not local, renin–angiotensin system is associated with upregulation of TNF α during prolonged fasting in northern elephant seal pups
... In northern elephant seal pups, prolonged fasting decreases local AGT production while circulating Ang II is elevated and associated with increased muscle TNF-α and decreased adipose Acrp30, ...
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Prolonged fasting does not increase oxidative damage or inflammation in postweaned northern elephant seal pups
... in seal tissues than in tissues of terrestrial mammals (Vázquez-Medina et ...in northern elephant seal pups immediately precedes the beginning of their diving lifestyle (Le Boeuf et ...
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Decreased expression of adipose CD36 and FATP1 are associated with increased plasma non esterified fatty acids during prolonged fasting in northern elephant seal pups (Mirounga angustirostris)
... The northern elephant seal pup (Mirounga angustirostris) undergoes a 2–3 month post-weaning fast, during which it depends primarily on the oxidation of fatty acids to meet its energetic ...in ...
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The contribution of nasal countercurrent heat exchange to water balance in the northern elephant seal, Mirounga angustirostris
... In the present study we investigated temporal nasal countercurrent heat exchange in the northern elephant seal by analysis of nasal morphology, measurement of nasal mucosal temperature g[r] ...
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Glucose production and substrate cycle activity in a fasting adapted animal, the northern elephant seal
... in elephant seals is near that of post-absorptive carnivores (Opazo et ...the northern elephant seal weanling may stabilize glucose utilization by making glucose available for consumption in ...
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Elevated carboxyhemoglobin in a marine mammal, the northern elephant seal
... typical elephant seal spends 9–10 months per year at sea with over 90% of its time underwater, and when on land will spend a large portion of time in sleep apnea (Blackwell and Le Boeuf, 1993; Robinson et ...
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High fatty acid oxidation capacity and phosphorylation control despite elevated leak and reduced respiratory capacity in northern elephant seal muscle mitochondria
... During development, weaned pups are known to upregulate expression of UCP2 in muscle (Martinez et al., 2013). While its cellular role is less defined, UCP2 may play a similar role in enhancing fatty acid metabolism and ...
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Apnea stimulates the adaptive response to oxidative stress in elephant seal pups
... Extended breath-hold (apnea) bouts are routine during diving and sleeping in seals. These apneas result in oxygen store depletion and blood flow redistribution towards obligatory oxygen-dependent tissues, exposing seals ...
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Southern elephant seal vagrants in Ecuador: a symptom of La Niña events?
... ern elephant seal and its congener species the northern elephant seal ...of elephant seals in 1998 and 2002 in the Gulf of Guayaquil (Alava and Carvajal 2005), it was ...
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Skin histology and its role in heat dissipation in three pinniped species
... Harp seal pups heat dissipates primarily via flippers and to a lesser ex- tent through the skin of the rest of the ...in Northern elephant seals, namely during hot weather thermal win- dows first ...
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Respiration and heart rate at the surface between dives in northern elephant seals
... TDR records were used to expedite the location of the surface intervals in the acoustic record (Fig. 2A). Acoustic recordings of surface intervals were then downloaded from the digital recording devices and analyzed ...
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Water conservation in fasting northern elephant seals (Mirounga angustirostris)
... the seal to take fewer breaths overall (Costa, 2002; Ortiz et ...fasting elephant seal pups and examined the relationship between REWL and apnea ...
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Arbovirus of Marine Mammals: a New Alphavirus Isolated from the Elephant Seal Louse, Lepidophthirus macrorhini
... southern elephant seals of known age that had returned to Macquarie Island for breeding, the annual molt, and the mid-year ...the seal was searched for lice, which were most often encountered on the hind ...
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Effects of buoyancy on the diving behavior of northern elephant seals
... in northern elephant seals Mirounga ...juvenile elephant seals translocated from Año Nuevo State Reserve, CA, USA, and released at various sites in Monterey Bay, CA, ...each seal was ...
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Voyage of the "Mary and Sally" to Macquarie Island for the purpose of obtaining sea elephant oil and seal skins
... During this fortnight of easterly gales, whilst the brig was at sea, her shore party reported that, owing to bad weather, they had got but little oil and a small lot of 30 seal skins... [r] ...
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Unihemispheric sleep and asymmetrical sleep: behavioral, neurophysiological, and functional perspectives
... Figure 3 Posture that northern fur seal assumes during USwS in water. Notes: Seal lying on its left side; the right hemisphere is awake while the left one is sleeping. Reprinted with the[r] ...
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Three-dimensional space use during the bottom phase of southern elephant seal dives
... We estimated the volume of water prospected by SES, that is to say the volume of water where SES would have been able to detect a prey during the bottom phase of a dive. To achieve this, we assumed that SES could see in ...
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Diurnal and seasonal variations in the duration and depth of the longest dives in southern elephant seals (Mirounga leonina): possible physiological and behavioural constraints
... destination (Fig. 2; Table 1). First, in both years, female 1547a/b travelled to the west coast of the Antarctic Peninsula (AP) and foraged on the continental shelf and at the shelf margin. Second, the three males (1545, ...
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