Abstract
The effects of experimentally alteredlife spans on the rate of fluorescent age pigment (FAP) accumulation were studied in the adult male houseflies. Two-fold differences in the median and the maximum life spans of the flies were achieved by varying the flight activity. The rate of FAP accumulation was significantly faster in the short-lived high activity flies than in the long-lived low activity flies. The maximum concentration of FAP reached was similar in both groups. The results strongly support the view that FAP accumulation is associated with physiological rather than chronological age of the houseflies. It is suggested that FAP be used as a cellular marker for physiological age.
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