king penguins
King penguins adjust their diving behaviour with age
... African penguins, Spheniscus demersus, by almost a third (Wilson, 1985), and drastic alterations in diving behaviour have been noted following an artificial increase in the drag in several other penguin ...Adélie ...
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High peripheral temperatures in king penguins while resting at sea: thermoregulation versus fat deposition
... for king penguins at sea, we focused our analysis on the night-time, where conditions were similar to the wild ...in king penguins resting for extended periods at the sea surface (brood patch ...
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Microplastic study reveals the presence of natural and synthetic fibres in the diet of King Penguins (Aptenodytes patagonicus) foraging from South Georgia
... rare. King Penguins (Aptenodytes patagonicus) feed on mesopelagic fi sh, which undergo diel vertical migrations towards the surface at ...of King Penguin faecal samples collected in February and March ...
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Glycerol and NEFA kinetics in long term fasting king penguins: phase II versus phase III
... fasted king penguins is also suggested by the slight decrease in the plasma concentration of β-hydroxybutyrate, a product of ...in penguins (Groscolas, 1986; Cherel et ...in penguins with the ...
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Apparent changes in body insulation of juvenile king penguins suggest an energetic challenge during their early life at sea
... juvenile king penguins during their dispersal phase at sea, focusing on the long-term ...juvenile king penguins increases after repeated experimental submersion in cold water (Barré and ...
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Exploration during early life: distribution, habitat and orientation preferences in juvenile king penguins
... for king penguins ...of king penguins increased considerably, as the retreating sea ice opened up new breeding sites and migration corridors towards new feeding areas ...juvenile ...
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Changes in Heard Island glaciers, king penguins and fur seals since 1947
... glaciers, king penguins and fur seals have been documented since their beginnings by members of the nine wintering parties and 11 summer expeditions that have visited the island since 1947 (table 1), the ...
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Are stress hormone levels a good proxy of foraging success? An experiment with King Penguins, Aptenodytes patagonicus
... of penguins to extract resources from the environment because it reduced mass gain to values experienced by individuals during poor environmental conditions (Bost et ...experimental penguins because the ...
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Adjustments of gastric pH, motility and temperature during long term preservation of stomach contents in free ranging incubating king penguins
... incubating king penguins whatever the extent of their gastric content preservation, excluding temperature adjustments from those factors involved in the mechanisms of stomach food ...incubating king ...
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The oxidative debt of fasting: evidence for short to medium term costs of advanced fasting in adult king penguins
... transduction signalling pathways as secondary messengers (tyrosine kinase membrane receptors, MAP kinases, nuclear factor κ B or Ras; Kamata and Hirata, 1999; Allen and Tresini, 2000), raising the question of whether ...
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Thermal strategies of king penguins during prolonged fasting in water
... breeding, king penguins fast voluntarily for up to ...of king penguins to fasting in cold water by: (1) monitoring tissue temperatures, as a proxy of tissue perfusion, at four distinct sites ...
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Diving energetics in king penguins (Aptenodytes patagonicus)
... wild king penguins and the energetic cost of swimming in a 30 m long swim channel were determined at Ile de la Possession, Crozet Archipelago, using external data loggers and respirometry, ...that ...
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Heart rate and energetics of free ranging king penguins (Aptenodytes patagonicus)
... the penguins. The foraging pattern of the king penguins used in the present study was similar to that described by other authors (Kooyman et ...of penguins (Wilson et ...
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O2 store management in diving emperor penguins
... emperor penguins, in which muscle is isolated from the circulation during the dive, and lactate washout occurs during the eupneic period when muscle perfusion is re-established (Scholander, 1940; Scholander et ...
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Antarctic Penguins as Reservoirs of Diversity for Avian Avulaviruses
... from king penguins (Aptenodytes patagonicus), royal penguins (Eudyptes schlegeli), Adelie penguins (Pygoscelis adeliae), and gentoo penguins (Pygos- celis papua) from Antarctica (5, ...
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Development of diving capacity in emperor penguins
... juvenile penguins do not represent a complete record of all dives during this period because of missed transmissions by the NOAA satellite, but they provide a first sampling of the diving depths and durations of ...
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Buoyancy and maximal diving depth in penguins
... all penguins exhibited cessation of flipper beating during the ascent (N=664 dives, 10 Adélies; N=425 dives, 2 ...Adélie penguins stopped beating their flippers corresponded to an average of 52±20 % of the ...
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Energetics of diving in macaroni penguins
... macaroni penguins, factors other than physiological ones are likely to be more important in determining average diving ...and king penguins, which may be pushing the physiological limits of aerobic ...
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Heart rate as a predictor of energy expenditure in undisturbed fasting and incubating penguins
... acclimatized king penguins fasting ashore, for restrained birds which were either resting or moving ...incubating king penguins in fact spend most of their time resting (60–75%) and have a ...
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Measuring foraging activity in a deep diving bird: comparing wiggles, oesophageal temperatures and beak opening angles as proxies of feeding
... that king penguins do not swallow water when they fail to capture a prey item, this strongly suggests that a prey item is, or prey are, captured during type B beak ...
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