Effect of trawling on animals of the sea bed 5 



Similarly, there was no appreciable change in fauna taken in grab and dredge on 

 stations 3 miles apart running out of the protected " banks " area and in to it again. 

 The fauna was similar to that noted above. 



On the other approach — the direct attack with the tickler chain and trawl — the 

 results are shown in Table II. It will be remembered that Hauls 7-13 of the first 



Table II. — Dredi^e catches before and after traw/ing 



station and Hauls 1-8 of the second, were more or less in the trawled area. It is clear 

 that after trawUng there was a new phenomenon in the catches, namely Heart Urchins 

 recently dead and broken. Possibly there is a similar phenomenon in Paddlers 

 {Portunus depurator); but in no other form is there any sign of damage. 



It may be noted that the 9 dead whole urchins taken in Haul 12 of Station 16 

 constitute one of those observations that one so frequently wishes one had not made. 



