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Problem
Using the following data, estimate, ‘Z’ based on growth and selection parameters. The input data are given in the following Table. In addition to this, VBGF parameters L$$\infty$$ , K, and selection parameters, $$\overline{L}$$and L' are needed. While L ¢ is some length for which all fish of that length and longer are under full exploitation. According to Beverton and Holt, L’ is the smallest length that are fully represented in the catch samples.
L$$\infty$$= 100cm; K = 0.3.
Sl.No. |
Length group (cm) |
Number of fishes caught (L) |
1. |
30-35 |
212 |
2. |
35-40 |
161 |
3. |
40-45 |
116 |
4. |
45-50 |
79 |
5. |
50-55 |
52 |
6. |
55-60 |
31 |
7. |
60-65 |
17 |
8. |
65-70 |
8 |
9. |
70-75 |
3 |
10. |
75-80 |
1 |
11. |
80-85 |
0 |
Last modified: Monday, 25 June 2012, 10:57 AM