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SOME FEMALE COORDINATING FACTORS IN AMPHIBIAN FERTILIZATION
Author(s) -
CABADA MARCELO O.
Publication year - 1975
Publication title -
development, growth and differentiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.864
H-Index - 66
eISSN - 1440-169X
pISSN - 0012-1592
DOI - 10.1111/j.1440-169x.1975.00187.x
Subject(s) - amphibian , human fertilization , biology , zoology , ecology , anatomy
The influence of volume and ionic composition of the hydrating media upon the fertility of Bufo arenarum oocyte strings, has been studied with the following results: a) when immersed in equal volumes of ionic and non‐ionic media, oocyte strings have been found to become more hydrated in the latter ones; b) oocytes are no longer fertile when hydration is 300–400% of their original weight ( critical hydration ). Fertility is recovered by adding ions or egg water to the medium or by modifying its pH; c) when hydration is beyond 500% of the original string weight ( extensive hydration ) fertility can also be recovered by these treatments, but only after a partial jelly‐coat liquefaction by thioglycolate. Egg water was also studied, and shown to have a buffering capacity between pH 5.5 and 7.0. It seems not to influence acrosomic proteinase release.