Table 2
Parameter estimates of the length–weight relationship for the selected cephalopod species in the Gulf of Cadiz: N (sample size), a intercept (CV by bootstrap), b slope (CV by bootstrap) and R coefficient of determination. Lengths are presented for dorsal mantle length (cm): Lmin minimum observed length, Lmax maximum observed length and mean length (SD), and weights are mean wet weights in g (SD). Depth range (m) is also shown for each species in the study area.
| Species | N | a | b | R | Lmin | Lmax | Mean length | Mean weight | Depth range |
|---|---|---|---|---|---|---|---|---|---|
| Allotheutis media | 82 | 0.132 (0.194) | 2.117 (0.067) | 0.955 | 1.8 | 5.8 | 3.7 (1.0) | 2.2 (1.2) | 16–674 |
| Eledone cirrhosa | 100 | 1.056 (0.254) | 2.341 (0.045) | 0.951 | 3.5 | 15.0 | 6.1 (1.6) | 81.5 (52.9) | 35–108 |
| Eledone moschata | 1306 | 0.032 (0.082) | 2.702 (0.014) | 0.920 | 4.2 | 15.8 | 9.2 (2.0) | 14.4 (8.5) | 16–496 |
| Illex coindetii | 232 | 0.043 (0.252) | 2.913 (0.032) | 0.943 | 4.8 | 25.0 | 13.4 (3.5) | 96.6 (64.2) | 44–695 |
| Loligo forbesi | 390 | 0.111 (0.104) | 2.553 (0.014) | 0.980 | 6.0 | 29.4 | 14.2 (4.2) | 114.6 (87.2) | 68–431 |
| Loligo vulgaris | 1655 | 0.159 (0.088) | 2.430 (0.012) | 0.961 | 5.8 | 36.0 | 15.9 (4.2) | 150.1 (102.2) | 16–141 |
| Octopus vulgaris | 800 | 0.485 (0.191) | 2.908 (0.023) | 0.917 | 8.6 | 37.0 | 17.6 (3.7) | 2311.0 (1397.3) | 19–347 |
| Sepia elegans | 2672 | 0.229 (0.074) | 2.577 (0.021) | 0.947 | 1.6 | 7.4 | 4.0 (0.8) | 9.0 (4.6) | 16–447 |
| Sepia officinalis | 1839 | 0.212 (0.121) | 2.802 (0.015) | 0.990 | 2.5 | 29.6 | 11.7 (3.6) | 260.2 (259.4) | 19–242 |
| Sepia orbignyana | 69 | 0.394 (0.222) | 2.380 (0.046) | 0.921 | 2.8 | 8.8 | 6.7 (1.3) | 38.6 (17.4) | 24–494 |
| Sepietta oweniana | 80 | 0.653 (0.107) | 2.070 (0.071) | 0.946 | 0.5 | 3.6 | 1.9 (0.6) | 2.8 (1.8) | 42–701 |
| Todaropsis eblanae | 157 | 0.182 (0.149) | 2.668 (0.023) | 0.977 | 3.5 | 23.0 | 9.1 (3.0) | 83.2 (70.2) | 42–686 |
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