Whitemouth croaker, Micropogonias furnieri, trapped in a freshwater coastal lagoon: a natural comparison of freshwater and marine influences on otolith chemistry
Whitemouth croaker, Micropogonias furnieri, trapped in a freshwater coastal lagoon: a natural comparison of freshwater and marine influences on otolith chemistry
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白口黄鱼（Micropogonias Furnieri）被困在淡水沿海泻湖中：淡水和海洋对耳石化学影响的自然比较
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发表时间：
2010
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影响因子：
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通讯作者：
J. Muelbert
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作者：
C. Albuquerque;N. Miekeley;J. Muelbert
锶和钡掺入耳石之间进行了比较，白口黄鱼，Micropogonias的，收集从诱捕的淡水人口（米林泻湖）和正常的海洋/河口人口在巴西南部。利用LA-ICPMS进行了化学分析，目的是验证海洋和淡水环境对Sr和Ba掺入的影响，作为进一步研究海洋和淡水连通性的基础。你好淡水种群以年龄较大的鱼类为主，平均±SD年龄为34±1岁，而沿海样本以年龄较小的鱼类为主，平均± SD年龄为14±7岁。锶和钡的掺入耳石生活史剖面之间的比较表明，显着较高的钡和较低的锶相比，海洋人口的淡水人口。此外，在淡水，河口和海洋生活史阶段沉积的耳石材料的比较表明这些环境之间的明显差异。中华绒螯蟹耳石中锶和钡的平均浓度。在淡水中，浮游生物分别为710和112 µg g g-1，在河口中分别为2069和16.7 µg g g-1，在海洋生物史阶段分别为2990和2.7 µg g g-1。本文报道了淡水黑腹叶蝉耳石中钡的含量。相对于其他淡水物种而言，鱼出现的频率较高。海洋鱼类生活史剖面中的锶水平随年龄增加，从2000微克/克增加到2900微克/克，这可能表明随着年龄的增长，在海洋中的时间比在河口沃茨中的时间更长。相比之下，对于淡水种群，锶水平在生命的第一年下降到约700 µg g-1，此后保持较低和稳定，与在米林泻湖捕获之前在河口环境中发生的早期生活史一致。结果证实了海水和淡水环境对钡和锶进入耳石的强烈和相反的影响，并表明M。米里姆泻湖中的黑猩猩是一个孤立的种群，不会繁殖，因此很可能灭绝。
Strontium and barium incorporation into otoliths was compared between whitemouth croaker, Micropogonias furnieri, collected from an entrapped freshwater population (Mirim Lagoon) and a normal marine/estuarine population in southern Brazil. Chemical analysis was performed using LA-ICPMS with the objective of validating the effects of marine and freshwater environments on Sr and Ba incorporation as a basis for further investigation of marine and freshwater connectivity of M. furnieri. The freshwater population was dominated by older fish with mean ±SD age of 34±1 y, whereas the coastal samples were dominated by younger fish of 14±7 y. Comparison of strontium and barium incorporation among otolith life-history profiles indicated significantly higher barium and lower strontium for the freshwater population compared to the marine population. Furthermore, comparison of otolith material deposited in the freshwater, estuarine and marine life-history phases demonstrated clear differences among these environments. Mean concentrations of strontium and barium in otoliths of M. furnieri were respectively 710 and 112 µg g-1 for freshwater, 2069 and 16.7 µg g-1 for estuarine, and 2990 and 2.7 µg g-1 for marine life-history phases. Barium concentrations in otoliths from the freshwater population of M. furnieri appeared high relative to other freshwater species. Strontium levels across life-history profiles of marine fish increased with age from 2000 to 2900 µg g-1, possibly indicating more time spent in marine than estuarine waters with age. In contrast, for the freshwater population, strontium levels decreased during the first year of life approximately to 700 µg g-1, and remained low and stable thereafter, consistent with the early life-history occurring in an estuarine environment prior to entrapment in Mirim Lagoon. The results confirm the strong and opposite effects of marine and freshwater environments on incorporation of barium and strontium into otoliths, and indicate that the population of M. furnieri in Mirim Lagoon represents an isolated population that does not reproduce and is therefore likely to become extinct.