Stable nitrogen and carbon isotope ratios as migration tracers of a landlocked goby, Rhinogobius sp. (the orange form), in the Lake Biwa water system
Stable nitrogen and carbon isotope ratios as migration tracers of a landlocked goby, Rhinogobius sp. (the orange form), in the Lake Biwa water system
复制标题
稳定的氮和碳同位素比作为内陆虾虎鱼（Rhinogobius sp）的迁移示踪剂。
DOI：
10.1046/j.1440-1703.2001.00427.x
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发表时间：
2001
影响因子：
2
通讯作者：
B. Rusuwa
中科院分区：
文献类型：
--
作者：
A. Maruyama;Yoshihiro Y. Yamada;M. Yuma;B. Rusuwa
利用稳定的氮和碳同位素比值追踪了日本琵琶湖水系中一种内陆虾虎鱼（橙子型）的河流-湖泊迁移。湖泊中吻虎鱼个体的δ 15 N值显著高于支流中大型个体（≥1+年龄）的δ 15 N值，但二者的δ 13 C值差异不大，且二者的分布范围没有重叠。由于这些值反映了相应的猎物生物在任何一个位置，它被揭示，没有一个大的个人已经从一个位置迁移到另一个。小个体（0+年龄）的δ 15 N值偏高，不可能是河流居民。这一结果表明，所有研究的小个体都度过了他们的幼虫期在湖中，和移民个体可以通过测量δ 15 N值保留在交替位置觅食的效果来区分。δ 15 N值可作为鱼类河湖洄游模式的一种有效示踪物。
Fluvial–lacustrine migrations of a landlocked goby, Rhinogobius sp. (the orange form) in the Lake Biwa water system were traced using stable nitrogen and carbon isotope ratios. The δ15N values of Rhinogobius sp. individuals in the lake were significantly higher than those of large individuals in a tributary river (≥1+ age) without overlap of the range, although there was little difference in the δ13C values between these two locations. Because these values reflected those of the corresponding prey organisms in either location, it was revealed that none of the large individuals had migrated from one location to the other. The δ15N values of the small individuals in the tributary river (0+ age) were too high to be fluvial residents. This result indicated that all of the small individuals studied had spent their larval periods in the lake, and that immigrant individuals can be distinguishable by measuring the δ15N values retaining the effect of foraging in the alternate location. We conclude that the δ15N value works as a useful tracer to clarify the fluvial–lacustrine migration pattern of the fish.
影响因子：
5
作者：
DENIRO, MJ;EPSTEIN, S
通讯作者：
EPSTEIN, S