lec 12

Question 1

masked boobies fly about 100km radius out from clipperton island. why limit that range?

Answer 1

• energetically 100km is all they can withstand (metabolic limit)
• also might just be a matter of it not being energetically worth it (not enough food out past 100km to make a trip worth)

Question 2

different activities are assoc w different metabolic rates. which activities have higher rates?

Answer 2

lying down and sitting have lower rates, while intensive physical activity has higher rates

Question 3

different energy budgets are associated w different times. what does this look like on a short term scale? a long term scale?

Answer 3

on a short term, different budgets are seen at different times in the day (ex. night time has lower metabolic rates since u aren’t really doing much)

on a long term, different budgets are seen in different seasons (in summer ur sweating more to regulate body temp, while in winter ur working off metabolic regulation)

Question 4

how can animals reduce their energy budget (or at least, reduce energy in certain areas to be used elsewhere)

how can we observe this in cod and blenny in the north sea?

Answer 4

ectotherms (and even endotherms to some degree) move to areas that match their body temp –> no effort in regulation

cod and blenny have both been observed to move to cooler waters in response to global warming
(cod moved less than blenny –> can be said that blenny survive narrower temp ranges ie blenny are more steno-, cod are more eurythermal)

Question 5

enzymes tend to work better at higher temperatures. why then is it that we observe impaired activity as temps incr? why is it that we also observe resting activity incr?

Answer 5

the idea of enzymes working more efficiently at higher temperatures applies off the cut to optimize an animal’s activity. thus, as temps go up, the activity becomes more and more impaired and resting state is at a higher activity rate (breathing heavier etc)