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首页> 外文期刊>Marine ecology progress series >Discriminating nursery grounds of juvenile plaice (Pleuronectes platessa) in the south-eastern Irish Sea using otolith microchemistry
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Discriminating nursery grounds of juvenile plaice (Pleuronectes platessa) in the south-eastern Irish Sea using otolith microchemistry

机译：使用耳石微化学鉴别东南爱尔兰海的幼年nurse（Pleuronectes platesa）的育苗场

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摘要

Nursery grounds are valuable habitats providing sources of food and refuge during early life stages for many commercially caught marine fish. Distinguishing between different nursery grounds and identifying habitat origin using trace elemental concentrations in aragonite structures of teleost fish has proved valuable in fish ecology and fisheries. This study aimed to (1) compare chemical signatures (elemental fingerprints) within sagittal otoliths of juvenile European plaice Pleuronectes platessa sampled from known nursery habitats in the south-eastern Irish Sea and (2) assess their potential and robustness as natural tags for identifying nursery grounds for the putative south-eastern Irish Sea plaice stock. Otoliths from juvenile plaice ('1-group', 6 to 15 cm total length) were obtained from 8 nursery grounds in coastal areas off north-west England and north Wales (including Anglesey) between June and August 2008. Solution-based inductively coupled plasma-mass spectrometry determined the concentrations of 10 elements (Li, Na, Mg, K, Mn, Zn, Rb, Sr, Sn, Ba), with significant differences in otolith element composition observed between all nursery grounds. Cross-validation linear discriminant function analysis (CV-LDFA) classified fish to their nursery ground of capture (46.2 to 93.3%), with a total group CV-LDFA accuracy of 71.0%. CV-LDFA between regions (north-west England and north Wales) classified fish with 82% accuracy. The discrimination of juvenile plaice from all 8 nursery grounds within the southeastern Irish Sea using otolith microchemistry offers significant opportunities in the development of future effective fisheries management strategies through understanding the supply of juveniles from specific nursery grounds and adult plaice in the south-eastern Irish Sea.
机译：苗圃是宝贵的栖息地，在生命早期为许多商业捕获的海鱼提供了食物和庇护所。在硬骨鱼的文石结构中使用微量元素浓度区分不同的育苗场并确定栖息地起源已被证明对鱼类生态学和渔业具有重要意义。这项研究的目的是（1）比较从东南爱尔兰海的已知苗圃栖息地采样的欧洲欧洲P（Pleuronectes）板的矢状耳石中的化学特征（元素指纹），以及（2）评估其潜力和健壮性，作为鉴定苗圃的天然标签推测的东南爱尔兰海种群的理由。在2008年6月至2008年8月之间，从英格兰西北部和威尔士北部（包括安格尔西）沿海地区的8个苗圃场中获得了来自幼年（（“ 1群”，总长6至15厘米）的耳石。基于溶液的感应耦合等离子体质谱法测定了10种元素（Li，Na，Mg，K，Mn，Zn，Rb，Sr，Sn，Ba）的浓度，在所有育苗场之间观察到的耳石元素组成存在显着差异。交叉验证线性判别函数分析（CV-LDFA）将鱼分类到其捕获的育苗场（46.2至93.3％），总的CV-LDFA准确度为71.0％。地区（英格兰西北部和威尔士北部）之间的CV-LDFA对鱼类进行分类的准确度为82％。通过使用耳石微化学技术对爱尔兰东南部海域内所有8个苗圃场的少年进行区分，通过了解东南爱尔兰海特定苗圃场和成年鱼的供应，为今后有效的渔业管理策略的发展提供了重大机遇。 。

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