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ANALYSIS OF ENVIRONMENTAL HISTORIES OF MARINE LIVES USING IT'S BIO-MINERALS

利用海洋生物矿物质分析海洋生物的环境历史

基本信息

批准号：
06839016
负责人：
ARAI Nobuaki
金额：
$ 1.34万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06839016/
关键词：
Red sea bream Pagrus major Scale Circulus Otolith Japanese Short-necked clam Tapes philippinarum Sr Ca PIXE Seawater temerature 硬組織微量元素分析鱗隆起線

项目摘要

(1) Scale circuli of red sea bream Pagrus major were counted to investigate the relation between circuli deposition and seawater temperature. The samples were collected from several stations indicated different temperature fluctuation. The daily deposition rate depended on their scale growth rate in accordance with their body growth since the circuli numbers were linearly proportional to their fork length.(2) Trace element concentration in red sea bream otoliths by particle induced X-ray emission, PIXE.Otoliths were collected from the juveniles reared at several stations indicated different temperature fluctuation. Otolith surfaces without cutting or polishing were exposed to a proton beam. X-ray spectra detected with a litium-drift silicon detector indicated that the otoliths contained several trace elements of 2+ valence such as Mn (40-64ppm), Fe (169-246ppm), zn (61-120ppm), and Sr (1634-2330ppm). The concentrations seemed to increase in proportion to temerature.(3) Japanese short-necked clams Tapes philippinarum were cultivated under three different immersed conditions then growth band patterns in the shell were statistically compared. The group A was immersed except at semi-diurnal low tide, group B was out in-air at lowest sea level in high tide and group C was kept always below sea surface throughout the experiment. No numerical difference was found in the growth band number among the groups. All clams subjected to a 66 minutes period seich in the band as well as semi-diurnal and diurnal tidal period.

(1)对红鲷鳞环进行了统计，探讨了鳞环沉积与海水温度的关系。从几个站点采集的样品显示出不同的温度波动。日沉积速率取决于它们的鳞片生长速率，而鳞片生长速率与它们的身体生长速率一致，因为它们的环数与它们的叉长成线性关系。(2)用粒子诱导x射线发射法测定红鲷耳石中微量元素含量。在不同地点饲养的幼鱼耳石显示出不同的温度波动。未经切割或抛光的耳石表面暴露在质子束下。用锂漂硅探测器检测的x射线光谱表明，耳石中含有Mn （40 ~ 64ppm）、Fe （169 ~ 246ppm）、zn （61 ~ 120ppm）和Sr （1634 ~ 2330ppm）等2+价微量元素。浓度似乎与温度成比例地增加。(3)在3种不同的浸泡条件下培养日本短颈蛤，并对其壳内生长带形态进行了统计比较。除半昼夜退潮时外，A组均浸泡在水中，B组在涨潮时海平面最低处出水，C组在整个实验过程中均保持在海面以下。各组间生长带数无数值差异。所有蛤蜊都经历了66分钟的潮带、半日潮和日潮期。