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Amphibian Reproduction - Anatomy & Physiology (view source)
Revision as of 13:21, 23 July 2008
, 13:21, 23 July 2008→Gastric brooding
* This substance has the ability to turn off the production of hydrochloric acid in the stomach. This source of PGE2 is enough to cease the production of acid during the embryonic stages of the developing eggs.
* This substance has the ability to turn off the production of hydrochloric acid in the stomach. This source of PGE2 is enough to cease the production of acid during the embryonic stages of the developing eggs.
** Once the eggs hatch, the tadpoles too create PGE2.
** Once the eggs hatch, the tadpoles too create PGE2.
*** The mucus excreted from the tadpoles' gills contains the PGE2 necessary to maintain the stomach in a non-functional state. **** These mucus excretions do not occur in tadpoles of most other species.
*** The mucus excreted from the tadpoles' gills contains the PGE2 necessary to maintain the stomach in a non-functional state.
*** These mucus excretions do not occur in tadpoles of most other species.
* During the period that the offspring are present in the stomach the frog does not eat.
* During the period that the offspring are present in the stomach the frog does not eat.
* Tadpole development takes at least six weeks, during this time the size of the mother’s stomach continues to increase until it largely fills the body cavity.
* Tadpole development takes at least six weeks, during this time the size of the mother’s stomach continues to increase until it largely fills the body cavity.