Skip to main content
. Author manuscript; available in PMC: 2009 Mar 18.
Published in final edited form as: Brain Res Bull. 2007 Nov 21;75(2-4):433–441. doi: 10.1016/j.brainresbull.2007.10.053

Figure 1. Aging in zebrafish results in reduced daytime activity and lower nighttime melatonin production.

Figure 1

A: Relative percent distance traveled in LD during the day (white) and at night (black) in zebrafish of four age groups (n=11–12 per group; same groups at daytime and at night), with daytime distance traveled by 1-year old fish represented as 100%. B: Brain melatonin levels (pg/μg protein) in the middle of the dark period in young (white) and aged (black) zebrafish (n=5–7 fish per group). C: Comparison of daily patterns of brain melatonin levels (pg/μg protein) in 1-year old (white diamond) and 3-year old (black square) zebrafish (4–7 fish per group per time point). Horizontal black bar represents the night period. Mean (SEM); * p < 0.05,** p < 0.001, compared to 1-year old zebrafish.