基于耳石信息的鸢乌贼不同地理种群比较研究

The purpleback flying squid Sthenoteuthis oualaniensis (S. oualaniensis) is one of the most important economic Cephalopods distributing in the Indian Ocean, the equator and Subtropical waters of Pacific. Comparative research of fisheries biology on S. oualaniensis would be studied among different geographic groups (the northwest Indian Ocean, high seas nearby the equator of eastern Pacific and the South China Sea). The statolith morphology of S. oualaniensis would be observed and measured to study the growth characteristic of the statolith morphology and to identify whether there would be significant differences among different geographic groups. The relationships between important featured parameters of statolith and the individual size (mentle length and body weight) will be studied and compared among different geographic groups to find the inherent relation. Age, growth and population structures of S. oualaniensis among different geographic groups would be studied based on the microstructure of statolith, and the growth characteristics will be compared to each group in order to find the internal regulations among the different geographic groups, the growth models will be created. Trace elements distributions on the statolith would be analyzed and compared among different geographic groups by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), and the relationship between the contents of trace elements and the marine environment factors would be built and compared to each different geographic groups. The populations structures will be identified by the trace elements distributions and the results would be compared to the hatching populations based on the microstructure of statolith. A new scientific system and research method of study on the different geographic groups of oceanic Cephalopod would be created by this study. The study of fisheries biology and the fisheries ecology of S. oualaniensis will be improved and the result will provide scientific basis for the reasonable development and scientific management of S. oualaniensis resources in the future.

鸢乌贼（Sthenoteuthis oualaniensis）是大洋性重要经济头足类，广泛分布于印度洋、太平洋赤道和亚热带海域。本研究以鸢乌贼的耳石为研究对象，分析不同地理种群（西北印度洋、东太平洋赤道附近公海和中国南海）鸢乌贼耳石的外部形态及其变化，建立基于耳石外部形态的判别函数；研究不同地理种群间耳石外部形态参数与个体大小（胴长和体重）关系的差异性，建立生长方程；利用耳石微结构研究其日龄、生长和群体结构，对比不同地理种群间个体的生长差异性；测定耳石微量元素，对比分析不同地理种群间微量元素分布差异性；结合海洋环境数据，研究微量元素变化与海洋环境之间的关系，建立一套基于耳石信息的不同大洋性头足类地理种群的研究方法和体系，丰富和完善鸢乌贼的渔业生物学和生态学，为合理开发与科学管理鸢乌贼资源提供科学基础。

鸢乌贼（Sthenoteuthis oualaniensis）是大洋性重要经济头足类，广泛分布于印度洋、太平洋赤道和亚热带海域，是中国鱿钓渔业和南海灯光罩网渔业重要的捕捞对象。本研究以鸢乌贼的耳石为研究对象，分析了不同地理种群（西北印度洋、东太平洋赤道附近公海和中国南海）鸢乌贼渔业生物学：分析了耳石的外部形态及其变化，建立了基于耳石外部形态的判别函数；利用耳石微结构研究其日龄、生长和群体结构，对比了不同地理种群间个体的生长差异性；测定耳石微量元素，对比分析了不同地理种群间微量元素分布差异性，丰富和完善了鸢乌贼的渔业生物学和生态学，为合理开发与科学管理鸢乌贼资源提供科学基础。