【作者】 张辉； 姜亚洲； 袁兴伟； 张翼； 李圣法； 程家骅；

【Author】 ZHANG Hui;JIANG Ya-Zhou;YUAN Xing-Wei;ZHANG Yi;LI Sheng Fa;CHENG Jia-Hua;East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of East China Sea and Oceanic Fishery Resources Exploitation, Ministry of Agriculture;

【机构】 中国水产科学研究院东海水产研究所农业部东海与远洋渔业资源开发利用重点实验室；

【摘要】 本研究利用六水合氯化锶进行大黄鱼(Larimichthyscrocea)幼鱼耳石的标记,探讨了锶元素对大黄鱼幼鱼耳石的元素指纹标记效果,分析了锶元素标记对大黄鱼幼鱼生长和存活的影响。结果表明:(1)阶段性倍增饲养水体中锶离子浓度可使标记组个体在特定耳石区段的Sr/Ca值显著提升,形成与对照组个体和野生个体在该耳石区段Sr/Ca值上的显著差异(P<0.01),标记组、对照组和野生个体在该耳石区段的Sr/Ca值分别为(3.58±1.09)mmol/mol、(1.73±0.08)mmol/mol和(1.09±0.35)mmol/mol。此区段形成的Sr/Ca峰值可视作标记组个体的耳石锶元素人工标记。(2)标志组和对照组大黄鱼幼鱼的生长速率和存活率均无显著性差异(P>0.05),表明此项标记技术对受标个体的生长和存活状况不会产生显著负面影响,可用作大黄鱼增殖放流鱼苗的规模化标记手段。更多还原

【Abstract】 The effects of hexahydrate strontium chloride on otolith marking, growth and survival of Larimichthyscrocea were studied, aiming to improve the applicability of this marking technique in tracing Larimichthyscrocea for a better evaluating of its effect of the enhancement. The results showed that fish exposed to increased levels of strontium hadhigher strontium-calcium ratio in the given part of the otolith relative to those of control and wild fish. The strontium-calcium ratios in the given part of the otolith for the marked, control and wild fish were 3.58±1.09 mmol·mol-1, 1.73±0.08 mmol·mol-1, and 1.09±0.35 mmol·mol-1, respectively. The higher otolith strontium-calcium ratio could be used as elemental fingerprint in identifying marked fish. In addition, there were no significant difference in both survival rate and growth among marked and control fishes, indicating that immersion in water enriched in strontium did not negatively affect the survival rate and growth of marked fish. Our results suggest that immersion in water enriched with strontium could be an effective means of marking hatchery-reared Larimichthyscroceafor stock enhancement.更多还原