Evidence of downstream migration of Sakhalin taimen, Hucho perryi, as revealed by Sr:Ca ratios of otolith

被引：31

作者：

Arai, T

Kotake, A

Morita, K

机构：

[1] Univ Tokyo, Ocean Res Inst, Int Coastal Res Ctr, Otsuchi, Iwate 0281102, Japan

[2] Univ Tokyo, Ocean Res Inst, Tokyo 1648639, Japan

[3] Hokkaido Natl Fisheries Res Inst, Kushiro, Hokkaido 0850802, Japan

来源：

ICHTHYOLOGICAL RESEARCH | 2004年 / 51卷 / 04期

关键词：

Hucho perryi; otolith Sr : Ce ratios; migration; anadromy; life history;

D O I：

10.1007/s10228-004-0230-x

中图分类号：

S9 [水产、渔业];

学科分类号：

0908 [水产];

摘要：

The migratory history of Sakhalin taimen, Hucho perryi, was examined in terms of strontium (Sr) and calcium (Ca) uptake in the otolith by using wavelength dispersive X-ray spectrometry on an electron microprobe. Otolioth Sr : Ca ratios of freshwater-reared samples remained consistently at low levels throughout the otolith. The Sr : Ca ratios of samples from Lake Aynskoye of Sakhalin Island showed a low value from the core up to a point of 700 - 2140 mum. Thereafter, the ratios increased sharply and remained at higher levels up to the outermost regions. The difference in Sr : Ca ratio might be the result of the presence of individuals that underwent seawater and freshwater life history phases, probably reflecting the ambient salinity or the seawater - freshwater gradient in Sr concentration. Otolith Sr : Ca ratio analysis revealed downstream migration history in H. perryi.

引用

页码：377 / 380

页数：4

共 19 条

[1]

Identifying sea-run brown trout, Salmo trutta, using Sr: Ca ratios of otolith [J].