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Abstract: Measuring activity of small mammals in the field is challenging because they are often out of view. We used a novel method, based on temperatures of collar radio transmitters, [...]

Abstract: When food patches vary in quality over time, sampling by repeated visits can allow animals to track this variation and improve their foraging success. Sampling, however, requires spending time [...]

Abstract: When an animal has found and consumed food at a new location, information about whether and when food will be present again could improve future foraging efficiency. A series [...]

Trichomonas vaginalis, a urogenital parasite, and its dependence on polyamine backconversion are discussed as is the potential of bis(alkyl) polyamine analogs as antitrichomonad agents. A study has shown that growth of T. vaginalis with DENSpm also brings on polyamine depletion and significant inhibition of growth by a mechanism that involves competition with the transport of spermine and inhibition of SSAT effectively blocking spermidine synthesis. The parasite differs significantly from other eukaryotes in several aspects of its polyamine metabolism. The spermine taken up is backconverted to spermidine through a spermidine:spermine N(super.1)-acetyltransferase (SSAT)/polyamine oxidase-coupled pathway.

The relation between patterns of intermittent locomotion and patterns of vigilance in foraging chipmunks is examined. The conclusion states that pauses in locomotion are very similar to head raising and should be taken into account in vigilance studies.