Besides that, further cleavages into morulla,
blastula, gastrula, early prism, 2-and 4-arm pluteus stages showed significant differences (P[?] 0.05) in development times among these four salinity levels.
Parameters (%) Antibody group PBS group 6- to 8-cell stages on the third day 24.8% (114/459) 48.4% (183/378)
Blastula stage on the fifth day 26.8% (123/459) 57.1% (216/378) Morula stage on the fifth day 12.4% (57/459) 24.6% (93/378) Parameters (%) Blank control group P value 6- to 8-cell stages on the third day 51.0% (192/376) <0.01 (a,b)
Blastula stage on the fifth day 64.9% (244/376) <0.01 (a,b) Morula stage on the fifth day 20.2% (76/376) <0.01 (a,b) The first day referred to the day of embryo collection.
splendens es que la gastrulacion es un fenomeno concomitante a la epibolia que acontece a partir de un grupo de celulas localizadas en el polo animal del huevo telolecito (
blastula) y durante la gastrulacion, las celulas de la
blastula experimentan una redistribucion dramatica para originar un embrion multilaminar con rudimentos de cabeza, tronco y cola (34), generado a traves de movimientos celulares altamente coordinados mediante los cuales, grupos definidos de celulas se internalizan desde la superficie formando un blastopore y dando origen al endomesodermo (28).
The beginning of gastrula marks the end of the
blastula stage, and it is followed by epiboly, defined as the movement of the yolk syncytial layer and blastodisc around the yolk cell.
Until the early
blastula stage the embryos continued to be flattened.
Collection of Embryonic Cells from
Blastula Stage Embryo.
similis 6 (9) 2 (6) 6 (14) 23 17 (17) (41) Oncaea borealis 3 (15 2 (0) 28 (6) 11 23 4 (28) (1)) (20) (17) Harpacticoids 0 (1) Unidentified 4 (4) 3 (0) 3 (0) 3 (1) 0 (3) 82 copepods (154) Copepod nauplii 7S (78) 192 553 329 273 138 (285) (457) (373) (391) (309) Zoea larvae Ostracods 1 (0) Decapod 0 (1) Euphausiid 1 (0) Veliger larvae 1 (2) 3 (4) 0 (4) Sagitta elegans 3 (2) 0 (1) 1 (0) 4 (4) 1 (0) Pluteus larvae 0 (2)
Blastula larvae Echinoderm juvenile 0 (1) Larvacea 0 (4) 3 (5) 1 (0) 3 (1) 15 (6) 3 (1) Oikopleura 1 (0) Fish larvae Zooplankton Mar 7 Mar 18 May 25 Silicoflagcllates 0 (1) Foraminifera Medusa 0 (2) 0 (2) Polychaetc larvae 3 (5) Calanus finmarchicus 2 (3) 1 (4) Pseudocalanus spp.
turn, inner, entrails, dysentery, industry,
blastula, gastrula,
An embryonic
blastula stage is a characteristic exclusive to animals.
Our findings of sharp declined of cortisol after fertilization at
blastula and gradual increased around the time of hatching has also been documented in the Japanese flounder (de Jesus et al.,1991), milkfish Chanos chanos (Hwang et al.,1992), Lates calcarifer (Sampath-Kumar et al., 1995), gilthead sea bream S.
The phenomenon occurs at the
blastula stage, between the 13th and 15th day after fertilization.