Changes in GnRH levels in the brain and pituitary gland during migrations of sockeye salmon and chum salmon

被引：0

作者：

T. Kitani

S. Matsumoto

H. Yamada

M. Amano

M. Iwata

H. Ueda

机构：

[1] Hokkaido University,Divison of Marine Bioscience, Graduate School of Fisheries Science

[2] Hokkaido University,Laboratory of Aquatic Bioresources and Ecosystem, Field Science Center for Northern Biosphere

[3] Kitasato University,Laboratory of Ecophysiology, School of Fisheries Science

来源：

Fish Physiology and Biochemistry | 2003年 / 28卷

关键词：

GnRH; smoltification; spawning migration; sockeye salmon; chum salmon;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Levels of two moleculer types of gonadotropin-releasing hormone (GnRH), salmon GnRH (sGnRH) and chicken GnRH–II (cGnRH–II) in the various brain regions and pituitary gland of sockeye salmon (Oncorhynchus nerka) and chum salmon (O. keta) during smoltification and spawning migration, respectively, were measured using specific time-resolved fluoroimmunoassay (TR-FIA) systems. Changes in sGnRH levels in different brain regions tended to be specifically synchronized with serum thyroid hormone or pituitary gonadotropin (GTH) levels during smoltification and spawning migration, respectively. In contrast, cGnRH–II levels did not show such synchronized changes. SGnRH and cGnRH–II in various brain regions might have different roles during smoltification and spawning migration of salmonid fishes.

引用

页码：269 / 270

页数：1

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