4 Matching Annotations
- Sep 2016
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scienceintheclassroom.org scienceintheclassroom.org
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(C) When stimulator triggered fish twitch after doublets, eels attacked (10 trials each for two eels).
Fig. 4 tab C: The fish's movement following the eel's doublet is stimulated by the experimenter. The eel recognises this movement and attacks. Conclusion: the eel always attacks when there is movement from the fish
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(C) Schematic of attack sequence.
fig.3 tab C:
- Fish is hidden behind an agar (algae jelly) barrier
- Eel sends out weak electric signal
- Fish moves due to the eel's electric signal. The eel recognises this movement.
- Eel attacks with strong electric shocks
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Two pithed fish (fish 1, 19 g; fish 2, 21 g) preparation.
Fig.2 tab C: experimental setup with two fish with a force transducer for each one
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(C) The utility of the discharge illustrated. Shown are the prey fish at 40 ms (green) and later, the position and velocity of the eel and fish at 160 ms (red fish). Green dotted fish outline shows velocity and location of uninterrupted escaping fish matched in time, size, and position from 40 ms, suggesting that the eel would have missed without the discharge.
Fig. 1. tab C: If the eel hadn't paralysed the fish (shown in green), the fish would have been able to escape, because it swims faster. But because the eel shocked it, it was slow enough to be caught by the eel. (shown in red)
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