PRIMARY PRODUCTION AND ITS GRAZING LOSS ESTIMATED BY PHYTOPLANKTON PIGMENTS IN THE WESTERN PART OF THE SUBARCTIC PACIFIC

浮游植物细胞中含有多种色素，每种浮游植物都有一定的色素附属物。通过高效液相色谱法（HPLC）定量观察这些色素。在本研究中，我们观察了在Oyashio地区的椰子石体的季节变化，以了解在亚北极太平洋的浮游植物的季节变化正在使用HPLC估计。28种椰子石体在Oyashio水域被观察到的椰子石体，EMILIANIA HUXLEYI V. HUXLEYI（51.6%），Calicopappus RIGIDUS（6.2%），和ZYGOSPHAER AMOENE（5.2%）是丰富的全年。从春季开始，随着季节的推移，各深度的石藻浓度和生物量中心逐渐增加。最大丰度出现在8月，水深30 M，水温10℃，PSU为32.8。从10月开始丰度变低。这些结果表明，椰子石细胞的浓度与水有关。我们将观察椰子石细胞的丰度和每种色素浓度之间的关系。

PHYTOPLANKTON HAS A CERTAIN ACCESSORY PIGMENT IN EACH SPECIES WHEREAS THERE ARE MANY PIGMENTS IN ITS CELL. THESE PIGMENTS ARE OBSERVED QUANTITATIVELY BY THE HIGH PERFORMANCE LIQUID CHROMATOGRAPHY (HPLC). IN THE PRESENT STUDY, WE OBSERVED SEASONAL CHANGES IN COCCOLITHOPHORES IN THE OYASHIO AREA TO UNDERSTAND SEASONAL CHANGE IN PHYTOPLANKTON BEING ESTIMATED BY USING HPLC IN THE SUBARCTIC PACIFIC.28 COCCOLITHOPHORE SPECIES WERE OBSERVED IN THE OYASHIO WATER AMONG COCCOLITHOPHORES, EMILIANIA HUXLEYI V. HUXLEYI (51.6%), CALICOPAPPUS RIGIDUS (6.2%), AND ZYGOSPHAER AMOENE (5.2%) WERE ABUNDANT THROUGHOUT THE YEAR. CONCENTRATION OF COCCOLITHOPHORES AND THE BIOMASS CENTER OF THE DEPTH WAS INCREASED WITH SEASON STARTED FROM SPRING. MAXIMUM ABUNDANCE WAS OBSERVED IN AUGUST AT 30 M DEPTH WHERE WATER TEMPERATURE WAS 10℃ WITH 32.8 PSU. THE ABUNDANCE BECAME LOW FROM OCTOBER. THESE RESULTS REVEAL THAT CONCENTRATION OF COCCOLITHOPHORES WAS RELATED WITH THE WATER.HPLC ANALYSIS WAS RECENTLY COMPLETED. WE WILL OBSERVE THE RELATION BETWEEN ABUNDANCE OF COCCOLITHOPHORES AND EACH PIGMENT CONCENTRATION.