Utilization patterns of estuarine and marine habitats by the halfbeak Zenarchopterus dunckeri at Iriomote Island, southern Japan, evaluated from otolith microchemistry
Utilization patterns of estuarine and marine habitats by the halfbeak Zenarchopterus dunckeri at Iriomote Island, southern Japan, evaluated from otolith microchemistry
复制标题
从耳石微化学角度评估日本南部西表岛半喙泽南翅鱼对河口和海洋生境的利用模式
DOI：
10.1007/s12562-014-0797-8
复制
发表时间：
2014
影响因子：
1.9
通讯作者：
Mitsuhiko Sano
中科院分区：
文献类型：
--
作者：
Takahiro Kanai;Kusuto Nanjo;Kodai Yamane;Yosuke Amano;Hiroyoshi Kohno;Yoshiro Watanabe;Mitsuhiko Sano
在日本南部西表岛，通过分析耳石Li/Ca和Sr/Ca比值，研究了HalfbeakZenarchopterus dunckeri的河口和海洋栖息地利用模式。幼鱼的Li/Ca和Sr/Ca比值的变化范围为：幼鱼的Li/Ca和Sr/Ca比值的变化范围为：幼鱼的Li/Ca和Sr/Ca比值的变化范围为：幼鱼的Li/Ca和Sr/Ca。dunckeri从最大（30 psu）到最小（0.5 psu）盐度水平的半咸水饲养实验估计，与野生个体收集的上游和下游站在浦内河口。大部分野生个体的Li/Ca和Sr/Ca比值沿着耳石样带从核心到后缘是恒定的，这落在饲养实验中估计的河口个体的耳石Li/Ca和Sr/Ca范围内，这表明这些个体在河口内发育，而不是在任何时候迁移到海洋环境，虽然一些下游居住的鱼类有较高的耳石元素比率比预定的河口范围在中间横断面。后一种鱼可能是被洪水意外地从河口冲入大海，随后又返回河口。结果表明，Z. dunckeri基本上是河口居民，在河口系统中完成其生命周期。
Estuarine and marine habitat use patterns in the halfbeakZenarchopterus dunckeriwere examined at Iriomote Island, southern Japan, by analyzing otolith Li/Ca and Sr/Ca ratios. The ranges of both Li/Ca and Sr/Ca ratios in juvenileZ. dunckerifrom the maximum (30 psu) to minimum (0.5 psu) salinity levels of brackish water estimated from rearing experiments, were compared with those of wild individuals collected from upstream and downstream stations in the Urauchi River estuary. The majority of wild-caught individuals had invariable Li/Ca and Sr/Ca ratios along an otolith transect from the core to the posterior edge, which fell within the otolith Li/Ca and Sr/Ca ranges estimated for estuarine individuals in the rearing experiments, suggesting that such individuals developed within the estuary without migrating to a marine environment at any time, although some downstream-dwelling fish had higher otolith elemental ratios than the predetermined estuarine ranges in the mid transect section. The latter fish may have been accidentally flushed from the estuary into the sea by heavy flood events, subsequently returning to the estuary. The overall results suggested thatZ. dunckeriis essentially an estuarine resident, completing its life cycle within an estuarine system.