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CHANGES IN CALCIUM CONCENTRATIONS OF SERUM AND COELOMIC FLUID OF THE BULLFROG, RANA CATESBEIANA , DURING LARVAL DEVELOPMENT AND METAMORPHOSIS
Author(s) -
OGURO CHITARU,
SASAYAMA YUICHI,
IKADAI HIROYUKI,
YOSHIZAWA HIDEKI
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.1975.00071.x
Subject(s) - bullfrog , coelom , metamorphosis , calcium , larva , endocrinology , medicine , biology , rana , body fluid , anatomy , ecology
The serum calcium levels of bullfrog tadpoles (stage 26 to 33) and adults are higher than those of the coelomic fluid. The serum levels increase gradually from stage 26 (7.6 mg/100 ml) to stage 30 (8.4 mg/100 ml), and then sharply to stage 33 (10.5 mg/100 ml), while the coelomic fluid levels increase from 7.1 to 8.7 mg/100 ml during this period. Only minor differences are found in serum and coelomic fluid sodium levels among larval stages with the exception of a temporary decrease during metamorphic climax. These results suggest that the adult type of regulation of serum calcium concentrations is established during larval development and is fully achieved after the completion of metamorphosis. The control mechanism for serum calcium may be different from that for coelomic fluid.