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首页> 外文期刊>Estuarine Coastal and Shelf Science >Environmental migratory patterns and stock identification of Mugil cephalus in the Spanish Mediterranean Sea, by means of otolith microchemistry
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Environmental migratory patterns and stock identification of Mugil cephalus in the Spanish Mediterranean Sea, by means of otolith microchemistry

机译：耳石微化学方法在西班牙地中海环境中的Mugill cephalus的环境迁移模式和种群识别

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The Flathead grey mullet, Mugil cephalus is the most globally-distributed Mugilidae species and its migrations and movement patterns have been studied globally but not in-depth in the Mediterranean region. Thus, the present study aimed: (1) to identify migratory patterns throughout the life-history of the Mugil cephalus in different Spanish Mediterranean wetlands, and (2) to study the presence of potential fish stocks of the species in the region, by means of otolith microchemistry. Specimens (n = 43) were obtained in three wetlands: Parque Natural Delta del Ebro (DE), a stratified estuary; Parque Natural de l'Albufera de Valencia (AV), a Mediterranean lake; and Parque Natural Salinas de Santa Pola (SP), a coastal salt marsh. Otolith microchemistry was studied using LA-ICP-MS (chronological variation of Sr:Ca and Ba:Ca ratios). The analysis of lifetime profiles revealed four behavioral patterns: Type I: most frequent use of estuarine environments (estuarine resident); Type II: freshwater behaviour during, early life history, moving though estuarine to marine waters at the end of their profile (freshwater migrant); Type III: estuarine water use in early life stages moving then towards sea waters (estuarine migrant); and Type IV: sea/high salinity water habitat use during their entire lifetime (seawater resident). A Canonical Discriminant Analysis, using Sr:Ca and Ba:Ca ratios from core and edge as variables, assigned individuals to the detected patterns with high accuracy (Type I > 95%; Type Il and Type III > 83%; and Type IV > 88%). Moreover, two potential fish stocks were identified by the analysis of Sr:Ca otoliths-edge ratios: one in the Valencian Gulf, DE-AV areas presented similar ratios, and the other in the southern location, SP (higher Sr:Ca values). Mugil cephaius presented diverse life patterns on the Valencian Community Mediterranean coast. Different strategies could be identified by the used methodology: some particular to an area (Type IV-SP); others shared among areas, changing environments in different stages of their life. The presence of different fish stocks could be influenced by a mesoscale current phenomenon observed in the region associated with the Balearic front. (C) 2017 Elsevier Ltd. All rights reserved.
机译：扁平头gray鱼，Mugil cephalus是分布最广泛的Mugilidae物种，其迁移和运动方式已在全球范围内进行了研究，但在地中海地区并未进行深入研究。因此，本研究的目的是：（1）在西班牙不同地中海湿地的整个Mugil cephalus的生活史中确定迁徙方式，以及（2）通过以下方式研究该地区该物种潜在鱼类种群的存在耳石微化学在三个湿地中获得了标本（n = 43）：天然河口三角洲埃布罗公园（DE），一个分层的河口；瓦伦西亚的阿尔布费拉自然公园（AV），地中海湖泊；和Parque Natural Salinas de Santa Pola（SP），一个沿海盐沼。使用LA-ICP-MS（Sr：Ca和Ba：Ca比值的时间变化）研究了耳石微化学。寿命分布的分析揭示了四种行为模式：I型：最经常使用河口环境（居民）。第二类：生命早期阶段的淡水行为，在其概况结束时通过河口迁移至海水（淡水移民）；第三类：在生命的早期阶段使用河口水，然后转向海水（河口移民）； IV型：在整个生命周期中使用的海水/高盐度水生境（常驻海水）。规范判别分析，使用核心和边缘的Sr：Ca和Ba：Ca比率作为变量，以高准确度将个体分配给检测到的模式（I型> 95％； II型和III型> 83％； IV型> 88％）。此外，通过分析Sr：Ca耳石边缘比率，发现了两种潜在的鱼类种群：一种在巴伦西亚海湾，DE-AV地区的比率相似，另一种在南部地区SP（较高的Sr：Ca值） 。 Mugil cephaius在巴伦西亚自治区地中海沿岸展现了多种生活模式。通过所使用的方法可以确定不同的策略：某些特定于某个区域（IV-SP类型）；其他人则在地区之间共享，在生活的不同阶段改变环境。在与巴利阿里锋有关的地区观察到的中尺度电流现象可能影响不同鱼类种群的存在。 （C）2017 Elsevier Ltd.保留所有权利。

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