population
group consisting of members of same species living in the same place at the same time
how is the sampling method done
organisms in a few small areas are counted and projected to the entire area
what are crucial factors that can impact the outcome of sampling
- sample size
- number of samples
how does the mark and recapture sampling method work
sample of population is captured, marked, and released
how does quadrant sampling work
series of squares of a determined size which are placed in a habitat of interest and species within these quadrants are identified and recorded
what does M mean
total of marked members of the population from first sample
what does n mean
number of individuals caught in the second sample
what does m mean
number of individuals caught in the second sample that are marked
if m is small what can happen to the estimation
may cause an overestimation of the population
if m is big what can happen to the estimation
may cause an underestimation of the population
what does the number of Indvidual’s present in a population depend on
- birth
- death
- immigration
- emigration
survivorship
proportion of offspring produced that survive to a particular age
fecundity
average number of female offspring produced by a female in each age class
what does the net reproductive rate indicate
whether population is increasing or decreasing
when will a population grow the fastest
the larger it is
exponential growth
assumes that a population is increasing at its maximum per capita rate of growth
-limitations do not exist
carrying capacity
max number of individuals of that species that the local environment can support
logistic growth model
- per capita growth rate decreases as population density increases
- carrying capacity
