Otolith chemistry analyses indicate that water Sr:Ca is the primary factor influencing otolith Sr:Ca for freshwater and diadromous fish but not for marine fish
Otolith chemistry analyses indicate that water Sr:Ca is the primary factor influencing otolith Sr:Ca for freshwater and diadromous fish but not for marine fish
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DOI：
10.1139/f09-112
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发表时间：
2009-10-01
影响因子：
2.4
通讯作者：
Severin, Kenneth P.
中科院分区：
文献类型：
--
作者：
Brown, Randy J.;Severin, Kenneth P.
水化学被认为是影响鱼耳石化学的主要因素。对淡水和淡水鱼类的实验结果与这一范例是一致的，但对海鱼来说，它们往往是模棱两可或相互矛盾的。对水化学数据的回顾表明，海水中的锶：钙(摩尔比)水平高于大多数淡水系统，而海水中的锶：钙变异性低于大多数淡水系统。因此，我们假设淡水鱼一生耳石的锶：钙含量较低，变异性适中，水栖鱼耳石的锶：钙含量较高，变异性较小，海水鱼耳石的锶：钙含量较高，变异性较小。81种淡水鱼、水栖鱼和海水鱼的耳石锶：钙剖面显示，淡水鱼的锶：钙含量较低，变异性低于预期，水栖鱼的锶：钙含量和变异性与预期一致，海水鱼具有较高的最大锶：钙含量，与预期的结果相似，但变化较大。这些结果表明，水体中的锶钙比是影响淡水和淡水鱼类耳石锶钙比变化的主要因素，而海水鱼耳石中锶钙比变化不大。
Water chemistry is thought to be the primary factor influencing fish otolith chemistry. Experimental results with freshwater and diadromous fish have been consistent with this paradigm, but with marine fish, they have often been ambiguous or contradictory. A review of water chemistry data indicated that Sr:Ca (mmol:mol) levels were higher in marine water than in most freshwater systems and that Sr:Ca variability was lower in marine water than in most freshwater systems. We therefore hypothesized that lifetime otolith Sr:Ca profiles of freshwater fish would exhibit low levels of Sr:Ca with moderate variability, of diadromous fish Would exhibit highly variable Sr:Ca levels, and of marine fish would exhibit high levels of Sr:Ca with low variability. Otolith Sr:Ca profiles from 81 species of freshwater, diadromous, and marine fish revealed that freshwater fish had low levels of Sr:Ca and lower variability than expected relative to marine fish, diadromous fish had Sr:Ca levels and variability that were consistent with expectations, and marine fish had high maximum Sr:Ca levels, as expected, and high Sr:Ca variability, similar in magnitude to diadromous fish, which was not expected. These findings indicate that water Sr:Ca is the primary factor influencing otolith Sr:Ca variation for freshwater and diadromous fish but not for marine fish.