20Animal behaviors are often affected by aging. In many insect species, 21 locomotor activity decreases with aging. Foraging ability may also decrease 22 with aging. However, few studies have investigated the effects of aging on 23 both locomotor activity and foraging ability. In the present study, we tested 24 the aging effect on locomotor activity and foraging ability in the assassin bug 25 Amphibolus venator. The present results showed that locomotor activity 26 decreased with age, similar to findings in many other animal species.
27However, foraging ability increased with age. Namely, the decline in 28 locomotor activity with age did not lead to a decline in foraging ability. The 29 positive relationship between foraging ability and age may be related to the 30 type of predation, sit-and-wait, used by A. venator via alterations in 31 investment in reproductive traits with age. 32 33