Fish Population Dynamic and Stock Assessment (2+1)

Problem

Using the following catch and effort data, compute catch/effort. Plot the catch/effort values against their corresponding values of effort and estimate a) intercept b) slope by linear regression techniques. Change the sign of ‘b’ from (-) to (+). Calculate the MSY and FMSY using Schaefer’s and Fox equations.

Sl. No.	Year	Catch (tonnes)	Effort (No. of vessel)
1.	1989	75	850
2.	1990	58	818
3.	1991	65	560
4.	1992	69	725
5.	1993	72	810
6.	1994	64	1100
7.	1995	70	1200
8.	1996	63	950
9.	1997	72	1200
10.	1998	63	1150

(i) Collect data from the field of a stock

(ii) Collect effort data employed to catch the stock in question

(iii) Collect the data for years.