文献类型： 外文期刊

作者： Arai, T ¹ ; Yang, J ² ; Miyazaki, N ³ ;

作者机构： 1.Univ Tokyo, Int Coastal Res Ctr, Ocean Res Inst, Otsuchi, Iwate 0281102, Japan

2.Chinese Acad Fishery Sci, Key Lab Ecol Environm & Resources Inland Fisherie, Freshwater Fisheries Res Ctr, Wuxi 214081, Peoples R China

3.Univ Tokyo, Ocean Res Inst, Ctr Int Cooperat, Tokyo 1648639, Japan

关键词： diadromy;estuarine resident;life history;otolith;pond smelt;Sr : Ca ratios

期刊名称：JOURNAL OF FISH BIOLOGY （ 影响因子：2.051； 五年影响因子：2.25 ）

ISSN： 0022-1112

年卷期： 2006 年 68 卷 5 期

页码：

收录情况： SCI

摘要： The life histories of the pond smelt Hypomesus nipponensis collected from Japanese fresh waters and brackish (sea) waters were studied by examining the strontium (Sr) and calcium (Ca) concentrations in their otoliths. The Sr:Ca ratios in the otoliths changed with the salinity of the habitat. The pond smelt living in a freshwater environment showed consistently low Sr:Ca ratios throughout the otolith, averaging 1.2-1.3 x 10(-3). These samples were identified as a standard freshwater type. In contrast, fish collected from the intertidal zone showed higher otolith Sr:Ca ratios than those in the standard freshwater type, and the ratios fluctuated along the growth phase. In addition to the two representative life-history types of H. nipponensis, i. e. freshwater and anadromous life-history types, other pond smelts were found to have an estuarine resident life history-type with no freshwater phase, indicating that the pond smelt has a flexible migration strategy with a high degree of behavioural plasticity and an ability to utilize the full range of salinity in its life history. (c) 2006 The Fisheries Society of the British Isles.