Figure 2.

Nictation in P. pacificus. (a) A representative dauer in nictation. Its posterior end remains attached to the substrate, whereas its anterior stands erect with occasional waving. Note a lipid droplet often observed on the side of the pharynx region of dauers in nictation. (b) Number of dauers in nictation in populations (n = 1000) of two entomopathogenic Steinernema species (S. feltiae (dashed lines with triangles) and S. carpocapsae (dashed lines with crosses)), the slug parasitic P. hermaphrodita (double line with rhombi), and two P. pacificus strains (PS312 (solid lines with filled circles) and RS5386 (solid lines with open circles)). Error bars represent standard errors of the mean (s.e.m.) corrected for small sample size n < 20.