Results 221 to 230 of about 6,647 (234)
Some of the next articles are maybe not open access.
Nestling Altricial Rodents and Lagomorphs Are Not Ectotherms
Physiological and Biochemical Zoology, 2022AbstractBased on the synthesis of data on metabolic rates of 15 species investigated at moderate ambient temperatures, nestlings of most studied species of altricial rodents and lagomorphs exhibit thermoregulatory control of thermogenesis within 3 d after birth, signifying that they express physiological thermoregulation for 86%-100% of their time as ...
openaire +2 more sources
Incremental markings of enamel in ectothermal vertebrates
Archives of Oral Biology, 2000The deposition of enamel is marked by the formation of growth lines, which reflect incremental growth. Although periodic markings have been observed in enamel of non-mammalian vertebrates, the cross-striation interval and the pattern of enamel deposition have not been formally investigated.
openaire +3 more sources
Oxygen consumption by mitochondria from an endotherm and an ectotherm
Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology, 1999Comparisons of metabolic properties of mitochondria from an endothermic and an ectothermic vertebrate were performed. Oxygen (O2) consumption rates of liver mitochondria from laboratory mice and western fence lizard (Sceloporus occidentalis) were determined over a range of temperatures (10, 20, 30 and 37 degrees C) and in the presence of a variety of ...
openaire +3 more sources
The influence of the cost of growth on ectotherm metabolism
Journal of Theoretical Biology, 1983A new model of ectothermic growth and metabolism is proposed. This model differs from most earlier models in representing explicitly the contribution of the "cost of growth" to ectotherm metabolism. It is shown that the cost of growth may constitute between 17 and 29% of the metabolism of an "average" ectotherm population.
openaire +3 more sources
Subzero temperatures and marine ectotherms
1992Sea water (osmolarity approximately 1000 mOsmoles 1−1) freezes at about −1.9°C. Most marine invertebrates have body fluids which are iso-osmotic with sea water and so have a similar freezing point. Provided that they are not in prolonged contact with ice crystals, such animals are exposed to little risk of freezing whilst immersed in sea water. Even so,
openaire +2 more sources
Thermal biology and mate acquisition in ectotherms
Trends in Ecology & Evolution, 1991Many elements of the behavioural repertoire of ectothermic animals depend on body temperature. Under differing thermal conditions, behaviours in insects, reptiles and other terrestrial ectotherms may therefore vary widely, and in any given thermal regime there may be simple physical and physiological character differences between individuals that lead ...
openaire +3 more sources
Temperature Relations of Ectotherms: A Speculative Review
1973The interpretation of the temperature relationships of ectothermic animals has already run through two phases and we now appear to be experiencing the beginning of a third. In the first phase ectotherms were regarded as being at the mercy of the environment, an interpretation best expressed by Krogh’s so-called “normal curve” (Krogh, 1914).
openaire +2 more sources
Plasticity of thymuses of ectothermic vertebrates
Immunology Today, 1996Alicja Jozkowicz +3 more
openaire +2 more sources