Dome trapBox trap

Figure 9. Crab average search angles around dome trap (left) and box trap (right) as seen from above.

Complementary observations were carried out in a large indoor tank by exposing the same 30 individual crabs to both box and dome trap designs, in order to quantify their responses and entry successes (Fig. 10). When placed in the tank only 63% of the crabs could enter the box trap in 1.5 hours, while 100% of the crabs entered the dome trap within the same time.

Box trap

Forward Side Back


โ€” 1 0%)

โ€”โ€”10 <33%)


Nn entry

Dome trap

0 0

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