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耳石是头足类重要的硬组织之一,其微化学被用于头足类生活史的重建、群体划分等渔业生态学领域.本文根据我国鱿钓船2007年在西北太平洋海域生产期间采集的柔鱼样本,利用激光剥蚀电感等离子质谱法(laser ablation inductively coupled plasma mass spectrometry,LA-ICP-MS)分析了18枚柔鱼耳石的微量元素组成及其分布特性.结果表明:柔鱼耳石主要由55种元素组成,含量最多的前10位元素分别为钙(Ca)、锶(Sr)、钠(Na)、磷(P)、钾(K)、硅(Si)、镁(Mg)、硼(B)、铁(Fe)和钡(Ba).方差分析表明,不同性别间柔鱼的Ca、Sr、Na、K、Mg、Fe、Ba的含量不存在显著性差异,但P、Si和B含量差异性明显;不同孵化期的群体间Sr和Na含量存在显著性差异,Ca、P、K、Si、Mg、B、Fe和Ba不存在显著性差异;不同耳石部位的Ca、Sr、Na、P、Mg和Ba含量存在显著性差异,而K、Fe、B和Si则不存在显著性差异.研究表明微量元素Sr和Na比较适合用于研究柔鱼的群体划分、洄游史推测等渔业生态学.
Ostoliths are one of the most important hard tissues of cephalopods, and their micro-chemistry is used in the field of fishery ecology such as the reconstruction of head-crab life history, group division, etc. According to our country’s squid fishing vessels were collected during the production of the Pacific Northwest Pacific Ocean in 2007 , The trace element composition and distribution of 18 Ocarina otoliths were analyzed by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). The results showed that: The stone is mainly composed of 55 kinds of elements. The top 10 elements with the most content are Ca, Sr, Na, P, K, Si, Mg (B), iron (Fe) and barium (Ba) .Analysis of variance showed that the contents of Ca, Sr, Na, K, Mg, Fe and Ba in squid had no significant difference among different sexes, , There was significant difference between the contents of Si and B. The contents of Sr and Na in different hatching stages were significantly different, but there was no significant difference in Ca, P, K, Si, Mg, B, Fe and Ba. There were significant differences in Ca, Sr, Na, P, Mg and Ba contents but no significant differences in K, Fe, B and Si. The results showed that trace elements Sr Na is more suitable for the study of squid population division, speculation and other migratory history of fisheries ecology.