Brown & May Marine Ltd
6.0 Beam Trawl Results 6.1 Catch Rates and Species Distribution The total number of individuals caught and the catch rate (number of individuals caught per hour) for fish and shellfish species by sampling area (control and East Anglia THREE) are given in Table 0.13 below and are illustrated in Figure 0.21. The catch rates by sampling station are shown in Figure 0.22.
Spatial distribution plots for P. platessa and L. limanda are given in Figure 0.23 and Figure 0.24. Spatial plots show the percentage distribution by catch rate of P. platessa and L. limanda. The circle size corresponds to the catch rate i.e. larger circles indicate greater catch rates.
A total of 18 species of fish and shellfish were caught, 13 of which were found at the control stations and 13 within East Anglia THREE. Overall, P. platessa was the most abundant species caught, followed by L. limanda.
The station with the greatest total catch rate was control station BT01 (188.8/hr); this can be attributed to the high numbers of B. undatum caught, representing 57.1% of the catch. P. platessa represented the highest proportion of the catch at half of the sampling stations.
Overall, the total catch rate was higher at the control stations (90.7/hr) than within East Anglia THREE (69.0/hr).
Table 0.13 Number of Individuals Caught and the Catch Rate for Fish and Shellfish Species by Sampling Area Species
Number of Individuals Caught Common Name
Plaice Dab
Whelk Solenette Scientific Name
Pleuronectes platessa Limanda limanda Buccinum undatum Buglossidium luteum
Lesser Spotted Dogfish Scyliorhinus canicula Common Dragonet Velvet Crab
Callionymus lyra Necora puber
Lesser Weever Bullrout
Dover Sole
Grey Gurnard Pogge
Scaldfish John Dory Mackerel
Sea Scorpion Turbot Whiting
Echiichthys vipera
Myoxocephalus scorpius Solea solea
Eutrigla gurnardus Agonus cataphractus Arnoglossus laterna Zeus faber
Scomber scombrus Taurulus bubalis Psetta maxima
Merlangius merlangus
Total No. of Individuals Total No. of Species
Catch Rate (No. of Individuals Caught per Hour)
Control 39
20 36 4 7 3 4 1 0 1 2 1 2 0 0 0 0 1
121 13
90.7 29
East Anglia THREE
48 22 0 9 1 2 0 2 2 1 0 1 0 1 1 1 1 0
92 13
69.0
Total 87
42 36 13 8 5 4 3 2 2 2 2 2 1 1 1 1 1
Control 29.2
15.0 27.0 3.0 5.2 2.2 3.0 0.7 0.0 0.7 1.5 0.7 1.5 0.0 0.0 0.0 0.0 0.7
Catch Rate (Number of Individuals Caught per Hour)
East Anglia THREE
36.0 16.5 0.0 6.8 0.8 1.5 0.0 1.5 1.5 0.8 0.0 0.8 0.0 0.8 0.8 0.8 0.8 0.0
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