Phoca vitulina
Aerial low frequency hearing in captive and free ranging harbour seals (Phoca vitulina) using auditory brainstem responses
... (Phoca vitulina, Lin- naeus), and the overlap between their at-sea distribution and sound producing activities has led to concerns about the potential impacts of sound on this species (Hastie et ...
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The impact of glide phases on the trackability of hydrodynamic trails in harbour seals (Phoca vitulina)
... The marine environment contains different sources of information allowing aquatic animals to orient themselves and localize their prey under water. One potential source of information is given by water disturbances – ...
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Pharmacological blockade of the dive response: effects on heart rate and diving behaviour in the harbour seal (Phoca vitulina)
... (Phoca vitulina) manage their oxygen stores through cardiovascular adjustments, including bradycardia, a concurrent reduction in cardiac output, and peripheral ...
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Sensitivity of the mystacial vibrissae of harbour seals (Phoca vitulina) for size differences of actively touched objects
... The study was conducted at ‘Tierpark Rheine’, Germany, using two experimentally naive harbour seals (Phoca vitulina, L.) as subjects: a 2-year-old female (Rosi) and a male (Robbi), 15 years of age. The ...
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Assay dependence of Brucella antibody prevalence in a declining Alaskan harbor seal (Phoca vitulina) population
... Harbor seal (Phoca vitulina) populations serve many im- portant biological and sociocultural functions in Alaska. Harbor seals are apex predators and serve as an import- ant prey for species such as killer ...
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Adaptations to diving hypoxia in the heart, kidneys and splanchnic organs of harbor seals (Phoca vitulina)
... Tissue samples from 10 adult or sub-adult harbor seals (Phoca vitulina L.) were taken within seven hours of death as part of a native subsistence hunt in Alaska. The heart, kidneys, liver, stomach and ...
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Hydrodynamic sensory threshold in harbour seals (Phoca vitulina) for artificial flatfish breathing currents
... (Phoca vitulina) and three vibrissae of a California sea lion (Zalophus californianus) for the ratio of the vortex-induced vibrations caused by flowing water and a hydrodynamic signal consisting of the wake ...
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Vibrissal sensitivity in a harbor seal (Phoca vitulina)
... Prior efforts to characterize the capabilities of the vibrissal system in seals have yielded conflicting results. Here, we measured the sensitivity of the vibrissal system of a harbor seal (Phoca vitulina) ...
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Parasites in harbour seals (Phoca vitulina) from the German Wadden Sea between two Phocine Distemper Virus epidemics
... The assessment of the health status of harbour seals (Phoca vitulina) in German waters has been undertaken since the seal die-oV in 1988/1989. While searching for the cause of the epizootic in the Wadden ...
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The metabolic characteristics of the locomotory muscles of grey seals (Halichoerus grypus), harbour seals (Phoca vitulina) and Antarctic fur seals (Arctocephalus gazella)
... It is not known precisely how marine mammals are able to maintain muscle function during active swimming in breath-hold dives, when ventilation stops and heart rate falls. Examination of muscle biochemistry and ...
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Identification and Molecular Characterization of Beta Hemolytic Streptococci Isolated from Harbor Seals (Phoca vitulina) and Grey Seals (Halichoerus grypus) of the German North and Baltic Seas
... The harbor seal (Phoca vitulina) is the most common rep- resentative of the pinnipeds in the Wadden Sea of the German North Sea (8, 12). The grey seal (Halichoerus grypus) is also resident in the Wadden ...
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Spatial variation in foraging behaviour of a marine top predator (Phoca vitulina) determined by a large scale satellite tagging program
... The harbour seal (Phoca vitulina) is a widespread marine predator in Northern Hemisphere waters. British populations have been subject to rapid declines in recent years. Food supply or inter-specific ...
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Detection and direction discrimination of single vortex rings by harbour seals (Phoca vitulina)
... compartment in which two VRGs were mounted on a semi-circular horizontal profile. The animal ’ s underwater stationing consisted of a hoop station and a bite target (distance to the apertures of the VRGs: 30 cm). A start ...
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Analysis of blood gases, serum fat and serum protein: a new approach to estimate survival chances of stranded Harbor seal (Phoca vitulina) pups from the German North Sea
... Background: Facing numerous challenges, such as illness, storms or human disturbance, some harbor seal (Phoca vitulina) pups lose contact to their dams and are found abandoned along the North Sea coast. In ...
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What a jerk: prey engulfment revealed by high rate, super cranial accelerometry on a harbour seal (Phoca vitulina)
... Recent studies have shown promising use of head- and jaw- mounted accelerometers sampling at 32 Hz to measure head surge in foraging attempts of both pinnipeds (Skinner et al., 2009; Suzuki et al., 2009; Naito et al., ...
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Selective heating of vibrissal follicles in seals (Phoca vitulina) and dolphins (Sotalia fluviatilis guianensis)
... It is suggested that the follicular harbour seals Phoca vitulina and of the follicle crypts on sinus system is a thermoregulatory structure responsible the rostrum of the dolphin Sotalia[r] ...
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Saccadic movement strategy in a semiaquatic species – the harbour seal (Phoca vitulina)
... Nine harbour seals ( Phoca vitulina Linnaeus 1758) served as experimental subjects. They were housed in seawater enclosures, netpockets made out of black net with a mesh size of 5×5 cm that are attached to ...
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Seasonal variation in harbour seal (Phoca vitulina) blubber cortisol A novel indicator of physiological state?
... Cortisol is one of the main glucocorticoid hormones involved in both the mammalian stress response, and in fat metabolism and energy regulation, making it of increasing interest as a biomarker for stress, health and ...
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Exposure of harbour seals (Phoca vitulina) to Brucella in declining populations across Scotland
... ABSTRACT: Since 2000 there has been a major decline in the abundance of Scottish harbour seals Phoca vitulina. The causes of the decline remain uncertain. The aim of this study was to establish the extent ...
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Monitoring harbour seal (Phoca vitulina) in the Danish Wadden Sea
... The mass die-off in 1988 is discussed within the framework of the knowledge on the population, and it is recommended that more effort be put into monitoring and population studi[r] ...
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