Transient alterations in neurotransmitter levels during a critical period of neural development in coho salmon (Oncorhyncus kisutch).
The time of parr-smolt transformation (PST) in salmon is a critical period of brain development during which the olfactory imprinting on the natal stream takes place. PST is associated with a surge of plasma thyroxine. We report here similar surges in the brain content of serotonin (5-HT), 5-hydroxyindoleacetic acid (5-HIAA), dopamine (DA), norepinephrine (NE), and glutamine (Gln). Other putative neurotransmitters, such as glutamate and aspartate show no such change while gamma-amino-butyric acid (GABA) shows a minor elevation.
Ebbesson
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Seward Marine Center, Institute of Marine Science, University of Alaska Fairbanks, 99664, USA.
Smith
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Ebbesson
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D000818:Animals; D001224:Aspartic Acid / Q000378:metabolism; D001921:Brain / Q000254:growth & development*; D005260:Female; D018698:Glutamic Acid / Q000378:metabolism; D008297:Male; D018377:Neurotransmitter Agents / Q000378:metabolism*; D017684:Oncorhynchus kisutch / Q000502:physiology*; D013997:Time Factors; D005680:gamma-Aminobutyric Acid / Q000378:metabolism
D018377:Neurotransmitter Agents; D001224:Aspartic Acid; D018698:Glutamic Acid; D005680:gamma-Aminobutyric Acid