QUESTION IMAGE
Question
unit 1 lesson 4a: life as a hunter
brainstorming:
after your hunt, what is your net gain?
| mass of prey item | total energy cost to hunt & kill (kcal) | total energy available per kill (kcal) |
|---|---|---|
| warthog 60 kg | -5,000 | +12,000 |
| wildebeest 265 kg | -10,000 | +25,000 |
| zebra 310 kg | -55,000 | +170,000 |
questions | answers
what do you think was motivating the lions to behave the way they did in the video: battle at kruger? | the factor(s) that motivated the lions to behave they way they is/are: the lions were motivated by the need for food and to survive and reproduce.
why do organisms like lions consume things? | lions consume specific things because...
based on the data you see on the table, what do you think would be the optimal prey for lions? | based on the data from the table, the best prey for lions is ____________ because...
what prey could give lions the greatest net gain of energy? net gain means the total increase or profit after all energy molecules/ costs, expenses, and losses have been subtracted from the total value so, net gain = amount of energy at the beginning (before hunting this prey) - the amount of energy gained from prey
activity:
using your kcal cash to represent the amount of energy a lioness begins her day, 15,000 kcal. she must consume for herself 13,500 kcal/day to survive and succeed in the environment. use the 15,000 kcal cash and the table above to calculate and design her meal for the day. ensure she consumes enough to make it through the day- which is 13,500 kcal.
what should she eat/hunt for? | why should she hunt for those specific prey?
what happens if she does not catch what she sets out to hunt for? | would the lioness be able to take care of herself, 2 cubs, and a lion? explain your answer.
Step1: Calculate net - gain for each prey
For Meerkat: Net gain = \(1000-3000=- 2000\) kcal
For Warthog: Net gain = \(12000 - 5000=7000\) kcal
For Wildebeest: Net gain = \(25000-10000 = 15000\) kcal
For Zebra: Net gain = \(170000-55000=115000\) kcal
Step2: Answer questions
Why do organisms like lions consume things?
Lions consume things to obtain energy for survival, growth, reproduction, and other life - processes.
Based on the data you see on the table, what do you think would be the optimal prey for lions?
The optimal prey is Zebra because it has the highest net gain of 115000 kcal.
What prey could give lions the greatest net gain of energy?
The prey that would give the greatest net gain is the Zebra because its net gain of 115000 kcal is higher than that of Meerkat, Warthog, and Wildebeest.
What should she eat/hunt for?
She should hunt for Zebra as it provides the highest net gain of energy which helps her meet her daily energy requirement of 13500 kcal.
Why should she hunt for those specific prey?
She should hunt for Zebra because it provides the most energy after accounting for the energy cost of hunting, allowing her to survive and succeed in the environment.
What happens if she does NOT catch what she sets out to hunt for?
If she does not catch what she sets out to hunt for, she may not meet her daily energy requirement of 13500 kcal, which could lead to weakness, reduced reproductive success, and potentially death.
Would the lioness be able to take care of herself, 2 cubs, and a lion? Explain your answer.
If she hunts and catches a Zebra, the high net gain of 115000 kcal would likely be sufficient to take care of herself, 2 cubs, and a lion as it can cover their combined energy needs. But if she fails to catch it, she may not be able to meet the energy demands for all of them.
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- Why do organisms like lions consume things? To obtain energy for survival, growth, reproduction.
- Based on the data you see on the table, what do you think would be the optimal prey for lions? Zebra, because of highest net - gain.
- What prey could give lions the greatest net gain of energy? Zebra, due to highest net - gain value.
- What should she eat/hunt for? Zebra.
- Why should she hunt for those specific prey? Provides most energy post - hunting cost.
- What happens if she does NOT catch what she sets out to hunt for? May not meet energy needs, risk of weakness/death.
- Would the lioness be able to take care of herself, 2 cubs, and a lion? If catches Zebra, likely yes; if not, likely no.