Dome-stage Zebrafish embryo. The animal pole is at the bottom of the image. The yolk syncytial layer shows two tiers of nuclei. As the sequence begins, the yolk syncytial layer narrows. The view then ...

Epiboly movements of yolk syncytial layer (YSL) nuclei during gastrulation from a dorsal-vegetal pole view. A marginal band of nuclei moves toward the vegetal pole during epiboly, while some nuclei mo...

Timelapse of dorsal yolk syncytial layer (YSL) nuclei and blastoderm morphogenesis from sphere stage (late blastula) to 1 somite stage. Top panel shows Nomarski movie of blastoderm morphogenesis inclu...

A 2.75 hour Zebrafish embryo; the same embryo as in CIL 37403 --later in blastoderm development. The video shows dynamics in a perisagital section of the embryo. The sequence shows blastomeres dividin...

Timelapse shows yolk syncytial layer (YSL) nuclear migration on the ventral side during gastrulation. Divergence of YSL nuclei away from ventral midline can be seen. As epiboly ends and blastopore clo...

Zebrafish embryo at 80% epiboly. The initial frame shows the junction of the enveloping layer with the yolk cell. The next frame is at a focal plane deeper within the embryo. The blastoderm margin is ...

A wave spreading around the blastoderm margin and then up the primary body axis is shown at 50x real time. The wave begins on the right side of the marginal zone. The movie represents a 30-sec integr...

Pre-wave pulse (PWP). The apparently whole-embryo calcium pulse appears to initiate (the PWP region on the wave graphs) over a widespread area of blastoderm, possibly earliest at the animal pole, and...

A unidirectional calcium wave arising form the left side. The wave originates from a hot spot on the left side of the blastoderm margin and intensifies while crossing the node region. This sequence ...

Short timelapse movie of prechordal plate, hypoblast, and yolk syncytial layer (YSL) nuclear movements during 80-90% epiboly. The prechordal plate and notochord can be seen as a tighter clump of cells...