Weddell seals
Factors affecting stroking patterns and body angle in diving Weddell seals under natural conditions
... adult Weddell seals, which are proficient divers, in McMurdo Sound, ...All seals conducted multiple deep dives (the mean dive depth range for each animal was ...(N=5 seals). But the fatter ...
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Estimating total body heat dissipation in air and water from skin surface heat flux telemetry in Weddell seals
... fur seals [18], and our observation of a larger axilla thermal signature in recently emerged animals extends this finding to Weddell ...emerged seals, indica- tive of locomotory heat production and ...
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An assessment of the audibility of sound from human transport by breeding Weddell seals (Leptonychotes weddellii)
... wildlife. Weddell seals (Leptonychotes weddellii) in particular can be exposed to anthropogenic noise because they live under, and breed on, the fast ice on which humans ...on Weddell seals we ...
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Aerobic capacities in the skeletal muscles of Weddell seals: key to longer dive durations?
... of Weddell seals are adapted for low levels of aerobic, lipid-based ...harbor seals and Steller sea lions, that experience both hypoxia and relatively high rates of oxygen consumption during diving ...
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The winter movements of Weddell seals in the sea ice zone of eastern Antarctica
... It is possible therefore that a lack of migratory behaviour may make Weddell seals less robust to climate change as: i the local habitat is under strong predatory pressure which may impa[r] ...
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Convective oxygen transport and tissue oxygen consumption in Weddell seals during aerobic dives
... less than required to maintain aerobic metabolism throughout the dive. Anaerobiosis will disrupt physiological homeostasis and possibly increase recovery time at the surface or require that subsequent dives be completely ...
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Age related differences in skeletal muscle lipid profiles of Weddell seals: clues to developmental changes
... 2006). Weddell seals in McMurdo Sound forage on a fairly predictable diet of Pleurogramma antarcticum [range 70–100% of all scats (Burns et ...juvenile Weddell seals, and to a lesser extent ...
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Reproductive Strategies of Adult Female Weddell Seals (Leptonychotes weddellii) and Their Implications for Pup Survival
... in Weddell seals (Leptonychotes weddellii), to gain a better understanding of reproductive strategies of an upper trophic level predator that must cope with unpredictable food availability in an extreme and ...
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Reproductive Strategies of Adult Female Weddell Seals (Leptonychotes weddellii) and Their Implications for Pup Survival
... development of the FASA technique (QFASA, Iverson et al., 2004) to study predator diets, but relies upon calibration coefficients of individual fatty acids to account for biosynthesis, deposition and mobilisation rates ...
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The ontogeny of aerobic and diving capacity in the skeletal muscles of Weddell seals
... been undertaken to define upstream activation motifs including a CCAC box, A/T element, nuclear factor of activated T cells (NFAT) response element and E boxes that are necessary for muscle-specific transcription of the ...
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Ecologie en mer des phoques de Weddell de l'Antarctique de l'Est en relation avec les param etres physiques de l'environnement = At sea ecology of Weddell seals in East Antarctica in relation with environmental physical parameters
... 2008). Weddell seals feed both on pelagic prey such as Pleuragramma antarcticum and squids, and benthic prey such as Trematomus fish species and invertebrates (Green & Burton 1987; Castellini et ...from ...
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Aspects of the ecology of Weddell seals at the Vestfold Hills, Prydz Bay, East Antarctica
... Interannual variation is currently being investigated by monitoring the population of Weddell seals at Vestfold Hills, Prydz Bay, East Antarctica A diurnal cycle in Weddell seal haul-out[r] ...
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Sex related differences in the postmolt distribution of Weddell seals (Leptonychotes weddellii) in the southern Weddell Sea
... tagged seals, our findings provide evidence for sex-related differences in the postmolt distribution of Weddell seals in the south- ern Weddell ...of Weddell seal habitats around the ...
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Bimodal winter haul out patterns of adult Weddell seals (Leptonychotes weddellii) in the southern Weddell Sea
... adult Weddell seals in the Weddell Sea and investigate the role of potential predictors to gain insight into the way these animals interact with the physical environment in this ...adult ...
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Metabolic rates of freely diving Weddell seals: correlations with oxygen stores, swim velocity and diving duration
... Introduction To construct reasonable models of the metabolism and the physiological constraints on the behavior of freely diving marine mammals, estimates of accessible body oxygen store[r] ...
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Aspects of the ecology of Weddell seals Leptonychotes weddellii along the Mawson Coastline, East Antarctica
... As well as being sighted within the transects during surveys 2 and 3, crabeater seals were also regularly sighted at other haul-out sites in the Macey area from late August, usually in c[r] ...
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Measuring the effect of human activity on Weddell seals (Leptonychotes weddellii) in Antarctica
... during rest or travel and, further, to determine whether heart rate changed in response to pedestrian approaches; iv to determine the immediate behavioural response of lactating Weddell [r] ...
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Response to change in the environment : population dynamics of Weddell seals in east Antarctica
... While the general pattern of sea-ice velocities around the Antarctic repeats from year to year, Figure 1 indicates that June–November ice velocities for 1990, 2003 and 2004 are lower than those in other years. During ...
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Muscular apoptosis but not oxidative stress increases with old age in a long lived diver, the Weddell seal
... of Weddell seals to determine whether previously observed morphological senescence is associated with oxidative ...years) seals exhibited a nearly 2-fold increase in apoptosis over young (age 9 – 16 ...
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Intrinsic anti inflammatory properties in the serum of two species of deep diving seal
... harbor seals (Phoca vitulina), gray seals (Halichoerus grypus) and harp seals (Pagophilus groenlandicus) have slightly reduced cell level inflammatory responses compared with dogs (Canis familiaris) ...
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