Biological Fluid Mechanics -- Starfish larvae

8. W. Gilpin, Vivek N. Prakash, and M. Prakash
Vortex arrays and entangled cilia underly the feeding vs. swimming tradeoff in sea star larvae
Nature Physics, 13, 380-386 (2017) 

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(Video Gallery Below)

 

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Video Gallery 

Video 1: Feeding vortices created by a starfish larva.

An eight-week-old starfish larva in water containing 6 um beads and ~5.5 um Rhodomonas lens algae. Frames combined over 3 second intervals using maximum-intensity projection, video shown at 8x speed. Field of view: 3.3 um.

Video 2: Swimming starfish larvae in a Petri dish.

Free-swimming eight week old Patiria miniata larvae in water containing 6 um beads and R. lens. Video shown 8x speed. Field of view: 22 mm.

Video 3: Swimming starfish larvae

Two freely swimming eight week old larvae of the starfish Patiria miniata, in water containing 6 um beads and R. lens. Video shown at 4x speed. Field of view: 5.5 mm.

Video 4: Swimming starfish larva in a Petri dish

An eight-week-old starfish larva swims in a rectangular chamber containing 6 um beads and R. lens algae. Frames combined over 1.5 second intervals using maximum-intensity projection, video shown at 8x speed. Field of view: 3.3 um.

Video 6: Pair of defects in a starfish ciliary band

A "+" and "-" ciliary defect pair on the side lobe a starfish larva. Water contains 6 um beads and R. lens algae. Video shown in real time. Field of view: 700 um.

Video 11:  Feeding and swimming behaviors created by a starfish larva

An eight-week-old starfish larva in water containing 6 um beads and ~5.5 um Rhodomonas lens algae. Frames combined over 3 second intervals using maximum-intensity projection, video shown at 8x speed. Behavioral transitions are seen in the video at the 1 s, 5 s, 13 s, and 22 s markers. Field of view: 3.3 um.

Video 12:  Circumoral field of a starfish larva

The circumoral field of an eight-week old starfish larva during feeding. Algae particles can be seen being carried along the ciliary band. Video shown at 1x speed. Field of view 427 um.

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