Question

are predator prey relationships density dependent

Review View Help Ink to Drawing Ink Shape Math Canvas Replay Drawing Tools Convert Insert Replay 3. Suppose the population density of a sample of deer is 50 per square kilometer. Assuming that the population is uniformly distributed what would the population size be if the deer encompassed an area that was 20km x 200km? Round to the nearest whole number 4. There are 252 deer in a population. There is no net immigration or emigration. If 47 deer die and 32 deer are born in one month, what is the population size at the end of the month? Round to the nearest whole number 5. In a population of 600 squirrels, the per capita birth rate in a particular period is 0.06 and the per capita death rate is 0.12 a. What is the per capita growth rate of the population? Round to the nearest hundredth. b. What is the actual number of squirrels that die during this particular period? Round to the nearest whole number c. What is the actual number of squirrels that are born during this period? Round to the nearest whole number. 6. In a population of 750 fish, 25 die on a particular day while 12 were born. a. What is the per capita death rate for the day? Round to the nearest thousandth. b. What is the per capita birth rate for the day? Round to the nearest thousandth. c. What is the per capita rate of increase for the day? Round to the nearest thousandth. 7. In a population of 125 foxes, 10 die on a particular day and 22 were born on that day. a. What is the per capita death rate for the day? Round to the nearest hundredth. b. What is the per capita birth rate for the day? Round to the nearest thousandth. c. What is the per capita rate of increase for the day? Round to the nearest thousandth.

Answer 1

Ans3)

Population density=Total No of individual in population (N) /Area in Km²

Total population size(N)=ppoulation density xArea in Km²=50 x 20x200=200000 individuals.

Ans4)Total initial deer population(No)=252

Growth in population =B-D +I-E

B=birth =32

D=death=47

E=Emigartion =0

I=immigration=0

Growth in population =32-47=-15

Population size at the end of month=No+ growth in population=252+(-15)=237

Ans5)

Total squirrel population =600

Per capita death rate(d)=0.12

Per capita birth rate(b)=0.06

Ans5a) per capita growth rate of population(r)=b-d=0.06-0.12= -0.06

Ans5b)Actual number of squirrel die during particular time period(D)= per capita death rate x total population =0.12x600=72 squirrels.

Ans 5c)Actual number of squirrel born during particular time period(B)=per capita birth rate x total population =0.06x600= 36 squirrels.

Ans6)

Total fish population =750

No of death on a particular day(D)=25

No of birth on a particular day(B)=12

Ans6a)per capita death rate for the day(d)=No of death on a particular day(D)/total population =25/750=0.033

Ans6b)per capita birth rate for the day(b)=No of birth at particular day(B)/Total population =12/750=0.016

Ans6c)per capita rate of increase for the day (r) =b-d=0.016-0.033= - 0.017

Ans7)

Total population =125 foxes

Total death at a particular day(D)=10

Total birth at a particular day(B)=22

Ans7a) per capita death rate for particular day(d)=D/total population =10/125=0.08

Ans7b) per capita birth rate for particular day(b)=B/total population =22/125=0.176

Ans7c)per capita rate of increase for the day(r)=b-d=0.176-0.08=0.096