Metabolic and cardiovascular effects of body weight supported treadmill walking in healthy older adults.

Background: The purpose of this study was to determine if body weight supported treadmill training (BWSTT) decreased metabolic and cardiovascular demand in older (50-74 years) healthy adults while walking a self-selected speed. The results of this study could impact clinician application to exercise therapy.

Methods: Twenty subjects (50% female, 58.

Using telemetry to mitigate the bycatch of long-lived marine vertebrates.

The unintended bycatch of long-lived marine species in fishing gear is an important global conservation issue. One suite of management approaches used to address this problem restricts or modifies fishing practices in areas where the probability of bycatch is believed to be high. Information on the distribution and behavior of the bycaught species is a desirable component of any such scheme, but such observations are often lacking.

Parasitic exploitation as an engine of diversity.

Parasitic exploitation occurs within and between a wide variety of taxa in a plethora of diverse contexts. Theoretical and empirical analyses indicate that parasitic exploitation can generate substantial genetic and phenotypic polymorphism within species. Under some circumstances, parasitic exploitation may also be an important factor causing reproductive isolation and promoting speciation.