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OBSERVATIONS ON THE EMBRYONIC DEVEPOLMENT OF TRITURUS /LISSOTRITON VULGARIS L.


MARIA PRISECARU, ROXANA VOICU, ALIN IOSOB

Issue:

SCSB, Volume XV

Section:

Volume XV - Animal Biology

Abstract:

There have been observations made on the reproductive behaviour of 20 individuals – (10♂ and 10♀) of Triturus vulgaris L., egg-laying, embryo development and larval evolution. A female lays about 10-15 eggs (each attached to a submersed plant). The egg is round, covered with three gelatinous membranes which insure its protection and fixation on the plant. Cell division begins at appproximately 4 hours after egg-laying and evolves to the stage of blastula in abour 30 hours. Gastrulation is marked by the appearance of the blastopore which represents the reference point all along the gastrulation process, differentiating the middle section of the animal pole. At the end of gastrulation, there begin transformations that lead to the formation of the neural system (neurulation). At its hatching, the larva has oceli, external gills and pigmentation. Its forelimbs form at 7-10 days after hatching, whereas the hind limbs appear after 1 month. Before its passing on land, the larva suffers a reduction of the gills tissue crests.

Keywords:

Triturus vulgaris L, , embryonic development, segmentation, gastrulation, neurulation, larvae.

Code [ID]:

SCSB200815V15S01A0011 [0002471]


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