大洋性鱿鱼的洄游路径能够给我们重要的信息，帮助我们了解其时空分布的变化。标记-重捕和电子标记方法在施行过程中仍存在一些问题。头足类的硬组织，如角质颚，有着稳定的形态特征和类似耳石的连续生长纹，同时包含丰富的生态信息，可以为我们研究物种的时空分布提供相关信息。本研究中，我们以北太平洋柔鱼为研究对象，基于不同角质颚生长阶段进行取样来重建鱿鱼的洄游路径。研究结果认为，通过电感耦合等离子质谱仪（LA-ICP-MS）取样，发现角质颚的喙端矢状平面（RSS）检测到9种微量元素。针对上述几种元素，发现不同生长阶段的磷（P）、铜（Cu）和锌（Zn）存在显著差异。利用钠（Na）、磷和锌与海表面温度（SST）建立线性回归模型。基于贝叶斯模型，计算出不同时期柔鱼出现的较高概率的海域。结合不同时期的高概率分布海域，建立起柔鱼的洄游路径，该结果与前人研究结果一致。本研究也证实了角质颚可以为研究大洋性柔鱼的洄游路径提供有效的信息。

From 1979 to 1989, the current Qingshuigou course of the Huanghe River formed a sub-delta which resembles a beak extending into the Laizhou Bay. It covers 618 km² in area. To meet the needs of developing and constructing the Huanghe River Delta and under the presupposition of keeping the current course for 15-20 a, we forecast mainly by using the OM (1, 1) model that the front border of the sub-delta will be close to 119°30'E and its area will become 923 km² by the end of the year 2000.The Huanghe River will make land 760 km² in area.

By using the wavelet transform (WT), we analysed part of the CTD data rnllected from the equatorial western Pacific Ocean, the results show that the temperature fine structure has selfsimilarity and may be described with fractel.The singularity exponents of temperature series and their probability distributions are also calculated.The probability distribution functions(pdfs) have nearly a universal form.The nonzero probability at negative exponents implies the posmible existence of sigular points in the temperature profiles.When computing the averaged period of the WT, we end that the mean period Δ of the WT of the temperature series has a power dependence on the transform Beak a.i.e.,Δ-α^β, with β≈1.This suggests that a simple dichomotous cascading mechanism may govern the fine-strueture dynamics.In addtion, since the amplitudes of the wavelet transform is related with the strength of the temperature fluctuations, the vertical distribution of fluctuation energy can be calculated by wavelet transform.Compared to the FFT spectrum, the WT spectrum is,smooth and is capable of giving more accurate spectral slopes.

本文分析了2009、2010和2013年期间采集于哥斯达黎加、厄瓜多尔、秘鲁和智利外海的茎柔鱼的角质颚下颚的δ¹³C和δ¹⁵N含量。各海区的稳定同位素含量反应了不同海区背景值的不同，海区间稳定同位素含量差异显著，其中厄瓜多尔外海最低，智利外海最高。δ¹³C和δ¹⁵N散点图显示，尽管秘鲁海区的同位素值与哥斯达黎加和智利的存在一定的重叠，但是δ13C和δ15N值可明显将各海区的样本明显分开。哥斯达黎加、厄瓜多尔和智利外海样本的δ¹³C和δ¹⁵N值分布相对集中以及三海区之间的δ¹³C和δ¹⁵N值差异显著说明，采自哥斯达黎加、厄瓜多尔和智利外海的茎柔鱼样本属于不同地理群体，它们的产卵起源不同，各自在相对狭小的地理区域内移动，相互之间没有种群交流。与之相比，δ¹³C和δ¹⁵N值变化范围广说明，秘鲁外海茎柔鱼样本的幼体是来自不同海区，经理不同的移动路线和索饵场。秘鲁和智利外海茎柔鱼样本的同位素值存在一定的重叠可能是由于两者之间存在一定的种群交流所致。总体来说，通过分析茎柔鱼角质颚稳定同位素的空间差异有助于我们了解其不同地理种群的迁徙策略以及相互之间的连通性。