Topic 10

Question 1

Age structure

Answer 1

number of different age classes + the number of individuals in each age class

Question 2

Age class

Answer 2

discrete group of individuals for at the same time

Question 3

Cohort

Answer 3

individuals that make up an age class

Question 4

Important because different age classes have ..

Answer 4

different birth and death rates. age classes contribute different numbers of offspring to the population

Question 5

Birth rate

Answer 5

number of female offspring produced per female in particular age class

Question 6

Number of offspring produced will differ ..

Answer 6

among age classes (sexual maturity)

Question 7

Primarily concerned w females because..

Answer 7

• birth rate is limited by number of females

- difficult to quantify contribution of each male

Question 8

Death rate

Answer 8

number of females that die per age class in the population

Question 9

Number of individuals dying will ..

Answer 9

differ among age class

Question 10

Survivorship curves

Answer 10

number of individuals alive (log scale) versus age. 3 hypothetical curves, few populations fit one precisely

Question 11

Birth (b) and death (d) differ amount..

Answer 11

age classes so each age class contributes to population size differently

Question 12

Population 1

Answer 12

same number of individuals in all age classes. pop. size increase if birth > death

Question 13

Population 2

Answer 13

only pre reproductive adolescents and adults to old to breed. pop size decrease if death> birth

Question 14

Life table

Answer 14

tabulation of b and d rates of each age class in a population. allows us to quantify whether the size of a population is increasing, stableor decreasing

Question 15

Cohort life tables (dynamic)

Answer 15

follow one cohort (indivs. w an age class) from birth to death determine d and b in each age class,

Question 16

Example cohort life tables

Answer 16

plants, sessile animals, mobile animals where dispersal is limit.

Question 17

Difficult to use cohort life table because

Answer 17

you cannot track high mobile animals, can take a long time to collect the data.

Question 18

Static life tables (time specific)

Answer 18

snapshot of the population at one point in time. estimate d by terming the age specific survival independently for each age class at a specific time.

Question 19

Example of static life tables

Answer 19

high mobile animals.

Question 20

Difficult to use static life tables because

Answer 20

hard to determine the ages of all individuals. can use stage or size classes if age cannot be determined.

Question 21

Underlying assumption of static life tables is stable age structure which =

Answer 21

number of individuals in each age class remains the same though time

Question 22

Ignore the variation of..

Answer 22

b and d amount individuals in an age class (ex size, competitive ability, social status)

Question 23

To construct a cohort life table we need to..

Answer 23

collect all the data