![]() Blastopore formation begins at 16.5 hours elapsed time (frame 94) and is complete by the end of the movie (23 hours elapsed). Contraction begins at about 3.3 hours elapsed time (frame 20). Scale bar is 1 mm.Movie3.aviMovie 4Shows vegetal cleavage and the large amount of contraction that occurs in the vegetal endoderm leading up to blastopore formation. Contraction of the vegetal region is apparent by about 20 hours elapsed time (frame 120). Scale bar is 1 mm.Movie2.aviMovie 3Shows vegetal view of cleavage from just before 4 cell stage through blastula stages. Scale bar is 1 mm.Movie1.aviMovie 2Shows dorsal view of cleavage through blastula stages. Mesendoderm migration during gastrulation is faintly visible through the blastocoel roof during gastrulation, starting about 50 hours (frame 300), and appears less coherent than that of Xenopus. Embryos increase in diameter throughout cleavage and gastrulation. Epiboly is evident beginning at around 30 hours elapsed time (frame 180). Please contact the author for more details or to gain access to more 1Shows cleavage from a dorsal view of four embryos still in their jelly coats, from 4 cell through gastrula stages. The first number represents the individual identifier and the second number is the image identifier. Each image is numbered with two identifiers. Representative Stage ImagesThese folders contain representative images for each stage of the embryonic table. ![]()
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