lab exam 2 assumptions

Question 1

assumptions for removal

Answer 1

1. constant prop. of N captured per effort
2. catchability stays the same
3. pop. is closed
4. only mortality is from investigator

Question 2

3 procedures for getting age structure

Answer 2

1. examine cohort thru life
2. examine all age classes at moment in time
3. knowing age at death for members of pop.

Question 3

data needed for Ratio

Answer 3

1. ratio of two types before and after

2. number of each type added or subtracted

Question 4

ratio major assumptions

Answer 4

1. no recruitment/mortality between sampling

2. adding/removing doesn’t influence behavior/distribution

Question 5

mark/recapture assumptions

Answer 5

1. populations closed
2. no sig. mortality
3. random distribution of marked
4. no recruitment
5. no loss of marks/tags
6. sampling method not selective