| 摘要: |
| 选取凤鲚(Coilia mystus)、湖鲚(Coilia nasus taihuensis)以及采自崇明、黄海和瓯江口3 个水域的刀鲚(Coilia nasus)的矢耳石为对象, 描述了这些鱼类耳石的形态特征, 并进一步使用基于12 组形态数据的框架测量进行了种间和种内比较和判别分析。结果表明耳石形态的差异种间较种内更为明显。本研究中, 刀鲚与凤鲚、刀鲚与湖鲚、凤鲚与湖鲚矢耳石形态间的差异极其显著, 相互间的判别准确率分别可达100%、94%、100%。不同水域刀鲚间虽亦有不同程度的差异,但判别的准确率仅为56%～83%,其中崇明和黄海刀鲚的耳石形态较为接近, 瓯江口刀鲚则与前两者差异相对较大。本研究还就影响耳石形态差异可能的因素进行了探讨。 |
| 关键词: 刀鲚(Coilia nasus) 凤鲚(Coilia mystus) 湖鲚(Coilia nasus taihuensis) 矢耳石 形态 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金项目(30871920); 国家973 计划项目(2010CB429005); 中国水产科学研究院内陆渔业生态环境和资源重点开放实验室开放基金项目(YZ2009-07) |
|
| A comparative study of the morphology of sagittal otolith in Coilia nasus, Coilia mystus and Coilia nasus taihuensis |
|
|
| Abstract: |
| A study using a truss network of 12 distance measurements was carried out on the intra-/inter-species morphological characteristics of the sagittal otolith in Coilia mystus (the Chongming Island), Coilia nasus taihuensis (the Yellow Sea), and Coilia nasus (the Oujiang Estuary). The results suggested that much more significant inter-species differences were observed than those of intra-species. Discriminant function analysis allowed correct classification rate of 100%, 94%, 100% for C. mystus vs. C. nasus, C. nasus vs. C. nasus taihuensis, and C. mystus vs. C. nasus taihuensis, respectively. In contrast, those only reached 56%～83% among C. nasus from the waters of Chongming Island, Yellow Sea, and Oujiang Estuary. The otolith morphological characteristics in C. nasus from the former two waters were more similar. Furthermore, the possible influential factors for otolith morphology of these Coilia fishes were also discussed in the present study. |
| Key words: Coilia nasus Coilia mystus Coilia nasus taihuensis morphology sagittal otolith |
