In Fishery Science, a Cohort Is the Collection of Fish

question 99

Multiple Choice

In fishery science, a cohort is the collection of fish that results from one annual reproduction. It is usually assumed that the number of fish N( t ) still alive after t years is given by an exponential function. For Pacific halibut, , where N _o is the initial size of the cohort. Approximate the percentage of the original number still alive after 7 years.

• A)24.7%
• B)26.0%
• C)8.2%
• D)49.3%
• E)14.0%