Read Boxes 6.3 & 6.4 in Hubert et al. (2012)1 and answer the following questions. [Note that the next reading below will also help with some of these questions.]

  1. What is C/f called?
  2. How is C/f defined (i.e., what is the equation for C/f)? Define all terms in this definition/equation.
  3. Describe the conceptual relationship between C/f and N?
  4. What are the assumptions that underlie the conceptual relationship between C/f and N? Identify which of these is the “primary” assumption.
  5. What has a large impact on estimates of C/f? Describe two ways in which fisheries biologists attempt to mitigate this impact.
  6. Describe three situations that may cause the relationship between N and C/f to be “curved.”
  7. Describe “hyperdepletion” and “hyperstability.”

Read Section 7.1 in Hubert & Fabrizio (2007)2 and answer the following questions.

  1. Describe how measures of effort may differ between types of gears. Include specific examples for common types of gears such as gillnets, fyke nets, seines, and electrofishing.
  2. Define “a stock.” Why is this important when considering C/f data?
  3. What are four common uses of C/f data?
  4. Critically assess the assumption of “constant catchability” (i.e., how often do you think that this is true?).

  1. The complete chapter is here. ↩

  2. The complete chapter is here. ↩