lec 4- life history

Question 1

what is maturity?

Answer 1

amount of time it takes till first reproduction

Question 2

what is parity?

Answer 2

number of episodes of reproduction in life time

Question 3

what is fecundity?

Answer 3

number of offspring in lifetime

Question 4

what is ageing/senescence?

Answer 4

life span

Question 5

what is the pattern of reproduction scene in individuals with short and long annual mortality rates?

Answer 5

low mortality means less number of offspring in one reproduction time , but more parity
high mortality means more number of offspring in one reproduction, but small parity

Question 6

what do bubble diagrams do?

Answer 6

summarize average life history events

Question 7

how did David Lack test that birds limit the number of eggs they lay because it is costly to raise offspring experimentally?

Answer 7

by increasing and decreasing egg amounts in nests

Question 8

why do birds have an optimal number of eggs when others still might be higher?

Answer 8

better survival of parent and offspring, high offspring numbers result in tradeoffs such as less time for parent survival if all is taken to care for young

Question 9

what is phenotypic plasticity?

Answer 9

Phenotypic plasticity refers to some of the changes in an organism’s behavior, morphology and physiology in response to a unique environment.