1. Read these notes and consider the items below.
    • Who popularized the use of single-census mark-recapture to estimate abundance in fisheries?
    • What would n.1.. represent? What is an alternative symbol for this value?
    • Be prepared to discuss the sampling (i.e., how fish are handled, how data is recorded, how many sample are taken,etc.) required for estimating abundance with the Petersen method?
    • Define N, M, n, and m.
    • What equation is used to estimate N?
    • What is the fundamental assumption that leads to the derivation of the equation used to estimate N with the Petersen method?
    • What are the rules for determining which distribution is used to construct a confidence interval for N?
    • Why did Chapman modify Petersen’s equation?
    • What is the equation for the Chapman Modification of the Petersen method?
    • What are the five assumptions for the Petersen (and related) methods?
    • What precautions do fisheries technicians take to attempt to have a “closed” populations?
    • What are common behaviors of fish that lead to a violation of the assumption of equal catchability?
  2. Read Section 8.3.1 in Hayes et al. (the complete reading) and consider the items below.
    • What are the six assumptions for the Petersen (and related) methods?
    • What is the equation for the Chapman Modification of the Petersen method?
    • Define N-hat, n1, n2, and m2.
    • What criteria are used to determine when the normal approximation can be used to develop confidence intervals for N?
  3. Read Section 9.2 in Introductory Fisheries Analyses with R and consider the items below.
    • What is the equation for the Chapman Modification of the Petersen method?
    • What are the five assumptions for the Petersen (and related) methods?
    • What R function is used to compute the Petersen (or related) estimates of abundance?
    • What argument must be included to specifically use the Chapman modification of the Petersen method?
    • This function can accept “data” in two ways. What are those two ways?
    • What function is used to extract the actual population estimate from the results of the main function?
    • What function is used to extract the confidence interval for the population estimate from the results of the main function?