利用耳石信息重建东南太平洋茎柔鱼的迁徙过程

项目名称： 利用耳石信息重建东南太平洋茎柔鱼的迁徙过程

项目编号： No.41306127

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 天文学、地球科学

项目作者： 刘必林

作者单位： 上海海洋大学

项目金额： 27万元

中文摘要： 茎柔鱼广泛分布于东南太平洋，资源量丰富且生态地位重要，同时也是我国远洋鱿钓渔业主要捕捞对象，年最高产量超过24万吨。尽管该资源已规模性开发有20年的历史，但对其生活史过程的了解极其缺乏，已制约着该资源的可持续利用和科学管理。耳石是头足类重要的硬组织之一，具有结构稳定、储存信息良好等特点，为此，本项目采用耳石微结构和微化学技术，结合地统计学等方法，通过对耳石生态信息的分析与判读及其与海洋环境的关系研究，揭示茎柔鱼不同生长阶段(胚胎、仔鱼、稚鱼、亚成鱼和成鱼)所适合的栖息环境，推测茎柔鱼所适合的产卵场和索饵场，重建产卵场到索饵场的迁徙过程，为掌握东南太平洋茎柔鱼资源分布及种群变动规律提供基础。同时，通过比较厄尔尼诺、拉尼娜和正常年份茎柔鱼迁徙路线的变化，探讨厄尔尼诺期间秘鲁外海茎柔鱼产量下降的原因以及分布范围的变化。

中文关键词： 耳石；微结构；微量元素；茎柔鱼；迁徙

英文摘要： The Jumbo flying squid (Dosidicus gigas) is one of most abundant and ecological important species widely distributed in the Southeastern Pacific Ocean. It plays a critical role in Chinese distant-water jigging fisheries with the largest yield more than 240,000 tones. Up to now, few studies focused on Dosidicus gigas life history has restricted the sustainable use and scientific manage of the resources, although it was large-scale developed more than 20 years. Statolith is one of hard tissues of cephalopod with structural satbility and storage of much information. In this study, we use multidisciplinary approach including geostatistics to investigate the migration strategy of D. gigas in the Southeastern Pacific Ocean base on statolith microstructure and microchemical information analysis. Our objectives of this study are to determine suitable habitat of each ontogenetic stage (embryonic, paralarval, juvenile, subadult and adult stages), speculate potential spawning and feeding ground and reconstruct migration strategy between the two places, which will provide the basis for mastering the distribution and population dynamics of D. gigas resources. Besides, we want to find reasons for the decline of Dosidicus gigas yield and change of distribution off Peruvian waters during El Nino by migration routes difference a

英文关键词： Statolith；microstructure；trace element；Dosidicus gigas；migration