- Sep 2016
-
scienceintheclassroom.org scienceintheclassroom.org
-
B) Without fish twitch, eels did not follow doublets with attack (10 trials each for two eels).
Fig. 4 tabB: Fish doesn't move after the eel's doublet because of the plastic bag isolation. Thus no response for the eel that there is a fish behind the agar barrier and no attack.
-
(B) Expansion of the first doublet and corresponding tension trace (off-scale peaks were estimated).
Fig. 3 tab B: This panel is a zoomed picture of the first signal of panel A. It shows that the fish moves only some Milliseconds after the eel's doublet of shocks.
-
B) All eels induced whole-body tension, occurring 2 to 4 ms after strong discharge onset. No tension was developed from weak discharge. At low frequencies, individual twitches emerged for each discharge (top right) (fig. S2).
fig. 2 tab B: Eel EOD = eel electric organ discharge = every red peak represents an electric shock by the eel When the eel starts shocking in a cascade, the fish tension changes, which means that it moves. little top right figure: Also when the eel sends only out single shocks with longer Pauses, the fish moves very time.
-
(B) Video frames showing that fish movement is arrested by discharge. Red frames indicate electric organ discharge (movie S1)
Fig. 1 -tab B: the little fish is paralysed starting from 60 ms till the end. This is indicated by the red filter on the photographs.
-