Quiz 2 Flashcards
1
Q
Ro
A
- net reproductive rate
- the mean number of offspring a typical female in the pop will produce over her lifetime
2
Q
How is Ro calculated
A
- per capita birth rate in a give year b(x) times the survivorship probability for that year l(x) summed over the fishes life
- sum of (l(x) x b(x))
3
Q
G
A
- average generation time of a population
- average age of the parents of all offspring from a single cohort
4
Q
r
A
- intrinsic rate of population increase
- also population growth rate parameter
- units are time^-1
5
Q
Px
A
- probability that an individual survives from one age class to the next
- (l(x)/l(x-1))
6
Q
Birth-pulse model
A
- assumes all the births occur in a single pulse
- projects how the population will change over time
- need Px and Fx
7
Q
Fx
A
- age specific fertilities
- b(x) times Px
8
Q
What gives us vital information on whether or not a population is growing
A
Ro and G
9
Q
Semelparity
A
spawn once then die
10
Q
Iteroparity
A
-spawn multiple times during lifetime
11
Q
What are constraints that can shape life history
A
-natural selection, reproduction, energy budget, physiology, environment
12
Q
How is reproduction a variable of life history
A
- age at first reproduciton
- size at first reproduction
- mating behavior
13
Q
How do we tell territorial and sneaker apart
A
- territorial males: High investment in seminal vesicles
- Sneaker males: high investment in sperm
14
Q
Protandry
A
- begins life as a male and then changes to female
- may be driven by energetic costs
15
Q
Protogyny
A
- begins life as a female and changes to male
- may be driven by competition
