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Interaction of bodymass, fat, foraging and stopover period in trans-Sahara migrating passerine birds
TLDR
A calculation of the maximum range which can be covered with the available fat depots revealed that nearly all birds from the desert stopover place should be able to cross the desert whereas about 60% of the oasis birds should not.
Sequential increases in capillarization and mitochondrial enzymes in low-frequency-stimulated rabbit muscle.
TLDR
To investigate temporal changes in capillarization and increases in mitochondrial enzyme activity, rabbit tibialis anterior muscles underwent chronic low-frequency stimulation for up to 50 days, with significant increases in capillary density and decreases in ICD and MCA observed.
Strategies of passerine migration across the Mediterranean Sea and the Sahara Desert : a radar study
Radar observations of the diurnal timing of bird migration in the Sahara Desert are presented for autumn migration. Study sites were on a transect along the north-south migratory direction. Three
Sequential increases in capillarization and mitochondrial enzymes in low-frequency-stimulated rabbit muscle.
TLDR
To investigate temporal changes in capillarization and increases in mitochondrial enzyme activity, rabbit tibialis anterior muscles underwent chronic low-frequency stimulation for up to 50 days, with significant increases in capillary density and decreases in ICD and MCA observed.
Habitat structure and fish: assessing the role of habitat complexity for fish using a small, semiportable, 3‐D underwater observatory
TLDR
A semi-portable, digital, 3-D underwater observatory designed for long-term exposure in shallow water habitats to assess fish-habitat interactions to artificial structures of different complexity proved highly valuable in assessing small-scale temporal patterns in fish-habitat interactions, as well as changes in habitat preferences of fish over the diel cycle.
Age and Other Factors Influencing Mating Status in German Great Reed Warblers (Acrocephalus arundinaceus)
TLDR
It is concluded that ecological conditions for polygyny are suboptimal in the study area but there seem to exist enough predictable differences in breeding situations to allow female choice and that females base their mate choice on both male characteristics and territory quality, and that these factors are positively correlated.
The daily pattern of autumn bird migration in the northern Sahara
TLDR
A correlation between the number of migrants observed during the night and thenumber of resting birds in the desert on the following day suggests that an unknown proportion of birds might regularly use an intermittent migratory strategy that includes rest periods by day when crossing the desert, whereas others might adapt a non-stop migratory Strategy.
Time-dependent increase of succinate dehydrogenase activity in low-frequency stimulated rabbit muscle: a comparison between microphotometric and biochemical methods
TLDR
An improved method for microphotometric measurement of enzyme activity in muscle fibres by determining maximum reaction rates using computer-assisted image analysis is presented, revealing pronounced scattering of SDH activities within the fibre populations of both normal and stimulated muscles.
Responses of fatigable and fatigue-resistant fibres of rabbit muscle to low-frequency stimulation
TLDR
Findings suggested that a large fibre fraction of the prestimulated muscle, possibly the glycolytic type IID fibres, did not contract, and the possibility must be considered that the metabolite pattern of the 24-h-stimulated muscle primarily reflected metabolic activities of the contracting, less fatigable fibres.
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