create required to maintain body temp. than ectotherms€¦ · ectotherms require relatively little...

Post on 10-Aug-2020

5 Views

Category:

Documents

0 Downloads

Preview:

Click to see full reader

TRANSCRIPT

» Create own heat from metabolic processes˃ Birds & mammals  (mainly)

» Energy is required to maintain body temp.» Increased respiration

» Higher body temp. than ectotherms» Usually between 36°C ‐ 42°C

» Smaller fluctuations in body temp. » Homeotherm – stable body temperature

»Mainly physiological regulation» Body temp. not uniform

•Warmest at core, cooler at extremities

˃PRO:+Increased habitat diversity+Less vulnerable to temp. changes+Internal reproduction+Increased bacterial protection

˃CONS:+Energetically costly

» Use external sources to regulate body temp.˃ Amphibians & reptiles

» Behavioral means to regulate temp.˃ Getting wet˃ Lying on cool ground˃ Finding shade˃ Climbing onto higher rocks˃ Lay in sun˃ Inflate body

» Large fluctuations in body temp.˃Poikilotherm – body temperature varies

» Relatively even temp. throughout body

˃PRO:+ Less food required+ Afford long periods of time without food

˃CONS:+ Dependent upon environment+ Limited habitable environments+ Limited regulation strategies+ Food acquisition difficult

Environmental Temperature

top related