ps1 - ESM 242 Assignment#1 Due in class Tuesday 1...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ESM 242: Assignment #1 Due in class Tuesday April 17, 2007 1 Recreational Abalone Diving Here we consider recreational abalone diving off the coast of Northern California. In this question we’ll develop and analyze a simple stylized model to assess the impact of various policy changes in the sport abalone fishery. Consider the following population growth model: N t +1 = N t + rN t 1- N t K- H t (1) where N t is the biomass of abalone, r = 0 . 2 is the intrinsic growth rate, K = 1000 is the carrying capacity of the abalone population, and H t is the harvested biomass in year t . 1. Identify the variable(s) and the parameter(s) of this model. 2. Suppose the abalone stock is severely depressed; say it is at 10% of the carrying capacity. Write a program in Excel to simulate the abalone population size over a 25 year period without harvest (i.e. if the fishery is shut down). Graph the recovery over time. Suppose we say that a population is “recovered” when it reaches 90% of carrying capacity. In what year did this population “recover”? Graph the “recovery” time as a function of the intrinsicyear did this population “recover”?...
View Full Document

This note was uploaded on 08/06/2008 for the course ESM 242 taught by Professor Costello during the Spring '07 term at UCSB.

Page1 / 2

ps1 - ESM 242 Assignment#1 Due in class Tuesday 1...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online