title: Photoperiod affects the development of central neurotransmitter systems of tilapia, Oreochromis mossambicus.
abstract: The effects of photoperiod on the development of central neurotransmitters were investigated with tilapia, Oreochromis mossambicus. Zero-day-old (the hatching day) tilapia were raised in three different photoperiods (light/dark cycle): 12/1, 24/0, and 0/24 h, respectively. On the 5th day, brain serotonin (5-HT), norepinephrine (NE), gamma-aminobutyric acid (GABA), and glutamate (Glu) contents were quantified by a high-performance liquid chromatograph with electrochemical detection. Similar experiments were performed on the 5-, 10-, 15-, 20-, and 25-day-olds. These results showed that the photoperiod influenced both brain NE and GABA contents during its respective restricted period, before days 10 posthatching. Brain 5-HT content was influenced, either facilitated or suppressed according to the developing stage, whereas, brain Glu content was not altered by the different photoperiod exposure throughout the present studies.
authors.affiliation: National Museum of Marine Biology and Aquarium, 2 Houwan Road, Checheng, Pingtung 944, Taiwan.
authors.forename: Yung-Sen
authors.initials: YS
authors.lastname: Huang
authors.forename: Li-Hsueh
authors.initials: LH
authors.lastname: Wang
authors.forename: Ching-Lin
authors.initials: CL
authors.lastname: Tsai
mesh_terms: D000818:Animals; D001921:Brain / Q000254:growth & development* / Q000378:metabolism; D005260:Female; D018377:Neurotransmitter Agents / Q000378:metabolism*; D017440:Photoperiod; D017210:Tilapia / Q000254:growth & development* / Q000378:metabolism
chemical_list: D018377:Neurotransmitter Agents