The Bacterial Microbiome in the Small Intestine of Hooded Seals (Cystophora cristata) [PDF]
Microorganisms, 2020 Arctic hooded seals (Cystophora cristata) are monogastric carnivores that go through extreme fasting and re-feeding in early life. They are born isolated on sea ice; suckle high-fat milk for four days and may then fast for up to one month before they ...
Mario Acquarone +2 more
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Investigating annual diving behaviour by hooded seals (Cystophora cristata) within the Northwest Atlantic Ocean. [PDF]
PLoS ONE, 2013 With the exception of relatively brief periods when they reproduce and moult, hooded seals, Cystophora cristata, spend most of the year in the open ocean where they undergo feeding migrations to either recover or prepare for the next fasting period ...
Julie M Andersen +6 more
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Elevated antioxidant defence in the brain of deep-diving pinnipeds [PDF]
Frontiers in Physiology, 2022 While foraging, marine mammals undertake repetitive diving bouts. When the animal surfaces, reperfusion makes oxygen readily available for the electron transport chain, which leads to increased production of reactive oxygen species and risk of oxidative ...
Gerrit A. Martens +3 more
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Drift diving by hooded seals (Cystophora cristata) in the Northwest Atlantic Ocean. [PDF]
PLoS ONE, 2014 Many pinniped species perform a specific dive type, referred to as a 'drift dive', where they drift passively through the water column. This dive type has been suggested to function as a resting/sleeping or food processing dive, and can be used as an ...
Julie M Andersen +6 more
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Transcriptomes Suggest That Pinniped and Cetacean Brains Have a High Capacity for Aerobic Metabolism While Reducing Energy-Intensive Processes Such as Synaptic Transmission [PDF]
Frontiers in Molecular Neuroscience, 2022 The mammalian brain is characterized by high energy expenditure and small energy reserves, making it dependent on continuous vascular oxygen and nutritional supply. The brain is therefore extremely vulnerable to hypoxia. While neurons of most terrestrial
Cornelia Geßner +5 more
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Hematologic and plasma biochemical prognostic indicators for stranded free-ranging phocids presented for rehabilitation [PDF]
Scientific Reports, 2022 This retrospective study used data obtained from medical records of 530 stranded free-ranging harbor (Phoca vitulina), grey (Halichoerus grypus), harp (Pagophilus groenlandicus), and hooded seals (Cystophora cristata) presented to the Marine Mammal ...
Matthew Vail +5 more
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Potential for flexible lactate shuttling between astrocytes and neurons to mitigate against diving-induced hypoxia [PDF]
Frontiers in NeuroanatomyFor most non-diving mammals, lack of O2 (hypoxia) has detrimental effects on brain function. Seals, however, display a series of systemic, cellular, and molecular adaptations that enable them to tolerate repeated episodes of severe hypoxia.
Chiara Ciccone +7 more
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Transcriptomes of Clusterin- and S100B-transfected neuronal cells elucidate protective mechanisms against hypoxia and oxidative stress in the hooded seal (Cystophora cristata) brain [PDF]
BMC Neuroscience, 2022 Background The hooded seal (Cystophora cristata) exhibits impressive diving skills and can tolerate extended durations of asphyxia, hypoxia and oxidative stress, without suffering from irreversible neuronal damage. Thus, when exposed to hypoxia in vitro,
Gerrit A. Martens +4 more
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Beach Buffet: First Observations of White‐Backed Vultures Gyps africanus Feeding on a Cape Fur Seal Arctocephalus pusillus on the Skeleton Coast [PDF]
Ecology and EvolutionVultures are avian obligate scavengers which provide important ecosystem services by efficiently removing carcasses from the landscape. Some species are now being observed feeding in coastal environments where they consume marine carcasses (i.e., whales,
Ruben Portas +7 more
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A new seal from the Late Miocene of the Eastern Paratethys highlights the past regional diversity of true seals (Phocidae) [PDF]
Swiss Journal of PalaeontologyTrue seals rapidly evolved in many forms in the epicontinental basin of Paratethys during the Miocene. However, most of their nominal taxa so far were proposed based on isolated limb bones, and their taxonomy has long been under discussion.
Pavlo Otriazhyi +4 more
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