Please turn in the
following (due next week):Mallards were banded during January and February in Illinois. Banding was done annually from 1963 through 1970 and recovery information was recorded through 1970.
The dataset is mallard.inp.
Analyze these data using program MARK (run all 4 models presented and others if you think you are up to the challenge).
All estimates Must be reported with a Confidence Interval
Which model is the best for use in making inferences from the data? How did you select this model? What are the specific assumptions of the model you selected in terms of survival and recovery rates? (5 pts.)
What is the estimated recovery rate for males and females banded during the second year of the study for the third year of recovery? (Hint: Use s(g*t) r(g*t) model to find the answer.) (2 pts.)
What is the estimated survival rate and recovery rate for the constant
survival and recovery rate across recovery periods and groups model (s(..) r(..))? (2
pts.)
Is the model s(g.)r(g.) significantly more likely to explain the variation in the data than the model s(..)r(..)? Identify your null hypothesis and alternative hypothesis and state your p-value relative to your alpha level (0.05) and state your statistical and biological conclusions. (2 pts.)
Are survival rates different for male mallards compared to female mallards banded in Illinois? (Hint: use the likelihood ratio test to determine if the difference in the estimates is statistically significant. Does sex explain a significant amount of the variation in the data.) (2 pts.)
Assume that a one-year reward-band study was conducted in 1963. In addition to the 2,583 male mallards banded with regular leg bands, an additional 2,583 male mallards were banded with $100 reward bands. Hunters turned in or reported 91 regular bands and 625 reward bands in 1963. (4 pts)
6a. What was the band reporting rate? Show your work.
6b. What was the estimated harvest rate? Show your work.
7. What factor other than the total number of birds you banded determines sample size and, consequently, the precision of your survival estimates? (3 pts.)
Extra Credit (+2 pts.) -What would you do if two different models had the same AIC value? Which one would you select?
Please turn in the
following (due next week):Hard copy of output if it was used to answer the above questions.
Typed and double spaced answers to questions. Note: your calculations for question 6 do not have to be typed.
Return to Lab Notes
 |
 |
 |
Revised: 25 August 2011