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Bioassay and Distribution of Thiamine in the Sea

K. V. Natarajan and R. C. Dugdale
Limnology and Oceanography
Vol. 11, No. 4 (Oct., 1966), pp. 621-629
Stable URL: http://www.jstor.org/stable/2833260
Page Count: 9
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Bioassay and Distribution of Thiamine in the Sea
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Abstract

A marine yeast, Cryptococcus albidus (Saito) Skinner, ahs been used for the biossay of thiamine in seawater and is sensitive in the range of 10 to 300 pg/ml thiamine. The distribution of thiamine has been determined in the North Pacific Ocean and the Gulf of Alaska. Thiamine concentrations in surface waters were found to range from undetectable levels up to 490 ng/liter and were generally high in coastal regions and low in open waters. The concentrations generally decreased with depth down to 50 to 75 m, below which the values were generally low or undetectable. Thiamine followed the temperature distribution, with high concentrations in the thermally stratified layer above the thermocline. In one area, there were high concentrations during April and September, but in November the concentrations decreased markedly.

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