In this exercise we explore further the Pacific sardine population. Studies to fit a logistic model to the Pacific sardine population have yielded the following. N=2.41+239e−0.338t Here, t is measured in years and N is measured in millions of tons of fish. (Round your answers to two decimal places.) (a) If the current level of the Pacific sardine population is 50,000 tons, how long will it take for the population to recover to the optimum growth level of 1.2 million tons? [Suggestion: One way to solve this is to make a new logistic formula using K = 2.4, r = 0.338, and N(0) = 0.05.] t = ____ yrs (I made a new formula and came up with: N=2.41+48e−0.338t, but using this is giving me all the wrong answers.) (b) The value of r used in the model for the Pacific sardine population ignores the effects of fishing. If fishing mortality is taken into account, then r drops to 0.215 per year (with the carrying capacity still at 2.4 million tons). Answer the question in part (a) using this lower value of r. t = ____ yrs
In this exercise we explore further the Pacific sardine population. Studies to fit a logistic model to the Pacific sardine population have yielded the following. N=2.41+239e−0.338t Here, t is measured in years and N is measured in millions of tons of fish. (Round your answers to two decimal places.) (a) If the current level of the Pacific sardine population is 50,000 tons, how long will it take for the population to recover to the optimum growth level of 1.2 million tons? [Suggestion: One way to solve this is to make a new logistic formula using K = 2.4, r = 0.338, and N(0) = 0.05.] t = ____ yrs (I made a new formula and came up with: N=2.41+48e−0.338t, but using this is giving me all the wrong answers.) (b) The value of r used in the model for the Pacific sardine population ignores the effects of fishing. If fishing mortality is taken into account, then r drops to 0.215 per year (with the carrying capacity still at 2.4 million tons). Answer the question in part (a) using this lower value of r. t = ____ yrs
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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In this exercise we explore further the Pacific sardine population. Studies to fit a logistic model to the Pacific sardine population have yielded the following.
N=2.41+239e−0.338t
Here, t is measured in years and N is measured in millions of tons of fish. (Round your answers to two decimal places.)
(a) If the current level of the Pacific sardine population is 50,000 tons, how long will it take for the population to recover to the optimum growth level of 1.2 million tons? [Suggestion: One way to solve this is to make a new logistic formula using K = 2.4, r = 0.338, and N(0) = 0.05.]
t = ____ yrs
(I made a new formula and came up with:
N=2.41+48e−0.338t, but using this is giving me all the wrong answers.)
(b) The value of r used in the model for the Pacific sardine population ignores the effects of fishing. If fishing mortality is taken into account, then r drops to 0.215 per year (with the carrying capacity still at 2.4 million tons). Answer the question in part (a) using this lower value of r.
t = ____ yrs
N=2.41+239e−0.338t
Here, t is measured in years and N is measured in millions of tons of fish. (Round your answers to two decimal places.)
(a) If the current level of the Pacific sardine population is 50,000 tons, how long will it take for the population to recover to the optimum growth level of 1.2 million tons? [Suggestion: One way to solve this is to make a new logistic formula using K = 2.4, r = 0.338, and N(0) = 0.05.]
t = ____ yrs
(I made a new formula and came up with:
N=2.41+48e−0.338t, but using this is giving me all the wrong answers.)
(b) The value of r used in the model for the Pacific sardine population ignores the effects of fishing. If fishing mortality is taken into account, then r drops to 0.215 per year (with the carrying capacity still at 2.4 million tons). Answer the question in part (a) using this lower value of r.
t = ____ yrs
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