Regulation of wing or foot strokes in deep-diving seabirds: a comparison between South Georgian Shag, Common Murre and Macaroni Penguin
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چکیده
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assessment of deep word knowledge in elementary and advanced iranian efl learners: a comparison of selective and productive wat tasks
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Stable isotopes indicate sex-specific and long-term individual foraging specialisation in diving seabirds
An important aspect of foraging ecology is the extent to which different individuals or genders within a population exploit food resources in a different manner. For diving seabirds, much of this information relates either to short-term dietary data or indirect measures such as time budgets. Moreover, dietary specialisation can be difficult to detect due to biases associated with conventional s...
متن کاملLocomotion and foraging strategy in foot-propelled and wing-propelled shallow-diving seabirds
Buoyancy is a major determinant of locomotory cost in diving animals. As seabirds have a large amount of air in their feathers and respiratory system, they should work hard against buoyancy to descend in the water column. Since buoyancy decreases with increasing hydrostatic pressure, shallow divers, especially, should work against buoyancy during both the descent and bottom phases of their dive...
متن کاملcomparison between conventional and alternative technique in extraction of maxillary molars
چکیده ندارد.
15 صفحه اولEnergetics of diving in macaroni penguins.
Heart rate (fH), abdominal temperature (T(ab)) and diving depth were measured in thirteen free-ranging breeding female macaroni penguins. Measurement of these variables allowed estimation of the mass-specific rate of oxygen consumption (V(O(2))) while diving and investigation of the physiological adjustments that might facilitate the diving behaviour observed in this species. In common with oth...
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ژورنال
عنوان ژورنال: Japanese Journal of Ornithology
سال: 2010
ISSN: 0913-400X,1881-9710
DOI: 10.3838/jjo.59.20