Trace elements in the statoliths of jumbo flying squid off the Exclusive Economic Zones of Chile and Peru

Marine Ecology Progress Series

Weiguo Qian¹  Bilin Liu¹  Xinjun Chen¹  Huajie Lu¹  Yong Chen¹ 

关键词: Dosidicus gigas;    Life history;    Chile;    Peru;    Strontium;    Barium;    Magnesium;    Sodium;   

DOI  :  10.3354/meps09106

学科分类：海洋学与技术

来源: Inter-Research

【 摘 要 】

ABSTRACT: Ontogenetic variation in 4 trace element (⁸⁸Sr, ¹³⁷Ba, ²⁴Mg, ²³Na) concentrations and their ratios to Ca were measured in statoliths of the jumbo flying squid Dosidicus gigas off the Exclusive Economic Zone of Chilean and Peruvian waters using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). The element compositions of statoliths showed no significant differences between females and males. All of the elements in different growth zones showed significant variations, except for Mg. Sr:Ca and Mg:Ca were good indicators for distinguishing squid from autumn and winter spawning seasons. Sr:Ca and Ba:Ca distribution patterns in statoliths confirmed that paralarvae and juvenile squid inhabit surface waters, while subadult squid migrate into deeper waters. An increasing Sr:Ca ratio of subadult squid could be explained by declining temperature gradients from northern to southern sampling locations, although no significant Sr:Ca differences were observed (p > 0.05). Mg:Ca ratios decreased progressively from the nucleus to the peripheral zone, which might be correlated with statolith growth rates. Na:Ca ratios slightly declined from paralarvae to the subadult phase. Quantitative relationships between statolith trace elements and environmental conditions under different growth stages are needed to improve our understanding of life history of D. gigas.

【 授权许可】

Unknown