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Figure S1. Movements of the defecation motor programme of P. pacificus. Defecation cycle of P. pacificus (relaxation periods in green and contractions in red, time in seconds). After a period of feeding the defecation process begins with a posterior body muscle contraction (pBoc) whereby food is pushed upwards to the pharynx and held for 1−2 s. The nematode then relaxes and the food moves down towards the posterior of the worm. There is a partial constriction of the lumen, the anus dilates and the worm expels the bacteria (exp). Immediately after, there is an anterior body muscle contraction (aBoc) whereby the head contracts. The worm then relaxes and resumes feeding.
Movie 1. Defecation cycle of Pristionchus pacificus. P. pacificus feeding on E. coli OP50 showing defecation movements.
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