P. Mattila et al., POSSIBLE FACTORS RESPONSIBLE FOR THE HIGH VARIATION IN THE CHOLECALCIFEROL CONTENTS OF FISH, Journal of agricultural and food chemistry, 45(10), 1997, pp. 3891-3896
Previously a high variation was found in the cholecalciferol (vitamin
D-3) contents of fish samples representing the same species but caught
in different habitats in Finland. The present study was designed to p
rovide reasons for this variation. The influences of various; factors,
e.g. weight, age, and sex of the fish as well as the cholecalciferol
content of zooplankton, on the cholecalciferol contents. of fish flesh
were studied. Perch, vendace, and pike samples were caught in three d
ifferent types of lakes, and perch, Baltic herring, and pike samples w
ere caught in the Baltic Sea. Zooplankton samples were caught in all f
our habitats. The cholecalciferol determinations were performed with H
PLC after purification with preparative HPLC. No consistent relationsh
ip between the weight, sex, or age of the fish and cholecalciferol con
tent was found. According to this study, it is possible that diet is a
likely factor which causes the variation in the cholecalciferol conte
nts of the fish.