Table 5
Exploitation indices for P. blennoides from the Algerian coast. Natural mortality from Djabali's equation (M1) and Pauly's equation (M2); Zc: total mortality from converted catch curve using FISAT II software; F1: fishing mortality using M1 and Zc; F2: fishing mortality using M2 and Zc; E1 and E2 exploitation rates using Zc.
| Sampling | M 1 | M2 | Zc | F1 | E1 | F2 | E2 |
|---|---|---|---|---|---|---|---|
| Bottom trawl survey in 2003 | 0.39 | 0.53 | 1.04 | 0.65 | 0.62 | 0.51 | 0.49 |
| Bottom trawl survey in 2004 | 0.44 | 0.62 | 1.68 | 1.24 | 0.74 | 1.06 | 0.63 |
| Commercial fisheries | 0.36 | 0.48 | 2.05 | 1.69 | 0.82 | 1.57 | 0.77 |
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