Table 2
Outputs of surplus production models are based on likelihood using deterministic approach. The parameters calculated below are: the slope of the Fox or Pella-Tomlinson model a, the intercept of the Fox or Pella-Tomlinson model b and the Pella-Tomlinson shape parameter m; the maximum sustainable yield (MSY in tons); the fishing effort multiplier at MSY (mEMSY), the ratio of current observed yield over the maximum sustainable yield (Ycur/MSY); the coefficient of determination for the functional relationship between abundance at equilibrium (derived from the Fox and Pella-Tomlinson models) and the abundance indices R2fun. The retained model for each species/taxa and its parameters are in bold.
| Common name | Scientific name | Model | a | b | m | MSY | mEMSY | Ycur/MSY | R2fun (%) |
|---|---|---|---|---|---|---|---|---|---|
| African lesser | G. decadactylus | Fox | –1.09 | 12923.76 | 4367 | 0.92 | 1.00 | 36.15 | |
| PT | –0.13 | 1.88 | 0.93 | 4356 | 1.03 | 1.00 | 36.24 | ||
| Bluespotted seabream | P. caeruleostictus | Fox | –0.98 | 10416.98 | 3911 | 1.02 | 1.09 | 67.17 | |
| PT | –0.11 | 1.80 | 0.94 | 3938 | 1.16 | 1.09 | 66.70 | ||
| Goatfish or Red mullet | P. prayensis | Fox | –0.30 | 1443.43 | 1761 | 3.32 | 0.72 | 62.53 | |
| PT | –0.03 | 1.53 | 0.94 | 1767 | 2.80 | 0.72 | 62.40 | ||
| Others groupers | E. spp. | Fox | –1.16 | 8436.49 | 2681 | 0.86 | 0.28 | 77.65 | |
| PT | –0.07 | 1.49 | 0.96 | 2696 | 0.87 | 0.28 | 77.52 | ||
| Red pandora | P. bellottii | Fox | –0.97 | 21335.71 | 8080 | 1.03 | 0.79 | 85.52 | |
| PT | –0.06 | 1.52 | 0.96 | 8100 | 0.97 | 0.79 | 85.13 | ||
| Rubberlip grunt | P. mediterraneus | Fox | –1.22 | 15134.03 | 4550 | 0.82 | 0.44 | 85.44 | |
| PT | –0.04 | 1.29 | 0.97 | 4575 | 0.82 | 0.44 | 85.11 | ||
| Smooth-mouth sea catfishes | A. spp. | Fox | –2.29 | 76994.75 | 12353 | 0.44 | 0.68 | 45.13 | |
| PT | –0.16 | 1.65 | 0.96 | 12050 | 0.57 | 0.70 | 44.59 | ||
| Snappers | Lutjanus spp. | Fox | –0.82 | 1933.87 | 864 | 1.21 | 0.42 | 55.15 | |
| PT | –0.08 | 1.64 | 0.93 | 866 | 0.99 | 0.42 | 55.02 | ||
| Tonguesoles | C. spp. | Fox | –1.29 | 24915.74 | 7115 | 0.58 | 0.76 | 70.25 | |
| PT | –0.11 | 1.70 | 0.95 | 7116 | 0.54 | 0.76 | 70.16 | ||
| White grouper | E. aeneus | Fox | –4.00 | 26747.68 | 2459 | 0.25 | 0.48 | 92.89 | |
| PT | –0.65 | 2.31 | 0.92 | 2458 | 0.19 | 0.48 | 92.19 |
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