Abstract:
:Pyrolyzed scales, fin spines, and bone from the ray-finned bony fish Polypterus (Actinopterygii) showed two mineral phases on X-ray diffraction: hydroxyapatite (HA), Ca5(PO4)3OH, and whitlockite, Ca3(PO4)2. The ratio of HA/whitlockite varied with the structure (scale, spine, bone) within each individual fish. The relative proportions of HA to whitlockite in pyrolyzed samples reflected the Ca/P ratio of the sample. Whitlockite appears after pyrolysis when the Ca/P is lower than 1.67. Among the five fish investigated, for each structure a general trend was noted. The proportion of HA relative to whitlockite increased with size (age) of the fish. Thus the smallest fish, a juvenile, exhibited a low Ca/P mineral in its calcified tissues, whereas the larger fish had progressively more HA and less whitlockite.
journal_name
Calcif Tissue Intjournal_title
Calcified tissue internationalauthors
Meinke DK,Skinner HC,Thomson KSdoi
10.1007/BF02441216subject
Has Abstractpub_date
1979-08-24 00:00:00pages
37-42issue
1eissn
0171-967Xissn
1432-0827journal_volume
28pub_type
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journal_title:Calcified tissue international
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journal_title:Calcified tissue international
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