Otolith elemental fingerprints distinguish Atlantic cod spawning areas in Newfoundland and Labrador
Otolith elemental fingerprints distinguish Atlantic cod spawning areas in Newfoundland and Labrador
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DOI：
10.1016/j.fishres.2013.04.006
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发表时间：
2013-10-01
影响因子：
2.4
通讯作者：
Rose, George A.
中科院分区：
文献类型：
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作者：
D'Avignon, Genevieve;Rose, George A.
采用激光烧蚀电感耦合等离子体质谱法（LA-ICP-MS）对纽芬兰和拉布拉多海域近岸、近海、北部和南部四个主要产卵聚集区的鳕鱼耳石组成进行了分析。利用Mg、Mn、Sr和Ba与Ca的元素比和鱼类生长速率，建立了每个产卵地点的群体特征指纹。指纹在不同组之间有所不同，但随着时间的推移也表现出一些变化。连续2年收集的3个队列的鳕鱼正确分配到产卵群的准确率为66%，当近海产卵区合并时，准确率提高到78%。我们的研究结果表明，耳石特征与生长速度相结合，有可能跟踪鳕鱼随时间的运动，识别可能随着气候变化而发生的分布变化，并有可能确定每个产卵群对渔业的贡献。(C) 2013 Elsevier B.V.版权所有
We used laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) to analyse the otolith composition of four key spawning aggregations of cod in Newfoundland and Labrador waters in inshore, offshore, north and south locations. A group-specific fingerprint was established for each spawning location, using the elemental ratios of Mg, Mn, Sr, and Ba to Ca and fish growth rates. The fingerprint differed among groups but showed some variations through time. Cod of three cohorts collected in two consecutive years were correctly assigned to their spawning group with 66% accuracy and increased to 78% when inshore spawning areas were merged. Our findings suggest that otolith signatures coupled with growth rates have potential to enable tracking of cod movements over time, identification of distribution shifts that may occur with changing climate, and potentially determine the contribution of each spawning group to fisheries. (C) 2013 Elsevier B.V. All rights reserved.