Fig. 4.

Swim types in C. robusta phototaxis. (A,B) Swim paths in ∼28 hpf C. robusta larvae responding to direction of light (indicated). Lines show all swims recorded in a 1 min capture session at 10 frames s⁻¹, and classified as sustained swims (A), or tail flicks (B). (C) Quantification of swims classified as either sustained or tail flicks for wild-type (wt) and homozygous pristine mutant (prs) larvae either with directional (light) or far-red (dark) illumination. Bars indicate means from three movies (±s.d.). (D) Total swim events. These numbers were generated by summing sustained swims and tail-flick counts from data in C. The total number of larvae screened for each condition (n) is given in parentheses in C and D. *P<0.05, **P<0.01 (Student's t-test).