BIOL2108H - Interactions and Metabolic Rates

main idea 1

species metabolic demands are shaped by their environments and thermoregulation strategies

metabolic rate

energy used per unit time

basal metabolic rate (BMR)

metabolic rate at rest

metabolic rate graph interpretation

-within the thermoneutral zone, body temperature is regulated by passive mechanisms, such as heat loss through the skin

-below the lower critical temperature, the animal expends energy to produce metabolic heat

-above the upper critical temperature, the animal must expend energy to lose heat by panting or sweating

statistical interaction

interactions occurs if a variable has a stronger or weaker effect depending on another variable (magnitude) or if a variable has a positive or negative effect depending on another variable (direction)

when one variable is numeric…

we can think of null hypothesis in terms of the intercept and slope of each regression line

interactions occur if…(slopes)

slopes are strong or weaker depending on the group (magnitude) or if slopes are positive or negative depending on the group (direction)

graph examples on slide to look at

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