North Pacific Anadromous Fish Commission

Technical Report 17

Table of Contents

Molecular Characterization and Expression of Synaptic Plasticity-related Genes in the Olfactory Organ and Brain of Chum and Pink Salmon during Seaward and Homeward Migration

Authors:
Takashi Abe and Hideaki Kudo

Abstract Excerpt:
Homeward migration of anadromous Pacific salmon (Genus Oncorhynchus) depends on the imprinted memory of odorants from their natal streams prior to seaward migration. Previous studies suggested the importance of synaptic plasticity in the olfactory imprinting of salmon. Although some neurotransmitters and receptors suggested its regulatory function in the olfactory imprinting by salmon, the relationship between pre-synapse molecules and olfactory imprinting was not revealed. A soluble N-ethylmaleimide-sensitive factor attachment protein receptor (Snare) complex mediates vesicle exocytosis in pre-synapse and regulates synaptic transmission and neuroplasticity (Fig. 1). In this study, three Snare component genes; snap25, stx1, and vamp2 were isolated from the olfactory center (olfactory bulb [OB] and telencephalon) of both chum salmon (Oncorhynchus keta) and pink salmon (Oncorhynchus gorbuscha) and the expressions in the olfactory nervous system during migrations of these salmon were analyzed by molecular biological techniques.

*This is the first paragraph of an extended abstract. Download the full abstract below.

DOI:
https://doi.org/10.23849/npafctr17/30.31.

Citation

Abe, T., and H. Kudo.  2021.  Molecular characterization and expression of synaptic plasticity-related genes in the olfactory organ and brain of chum and pink salmon during seaward and homeward migration.  N. Pac. Anadr. Fish Comm. Tech. Rep. 17: 30–31.  https://doi.org/10.23849/npafctr17/30.31.