Children who suffer chronic abuse and become aggressive teens and adults have been found to have lower-than-normal levels of serotonin. higher-than-normal levels of testosterone. lower-than-normal levels of testosterone. lower-than-normal levels of adrenal hormones.

Children who suffer chronic abuse and become aggressive teens and adults have been found to have:
higher-than-normal levels of testosterone.

low serotonin level may concern persons with chronic depression.
Aggressivity is known to increase testosterone (male hormone) and adrenaline level released by the activation of the sympathetic system.

Children who suffer from chronic abuse and become aggressive teams and adults have been found to have lower than normal levels of serotonin.

Serotonin is termed the chemical nerve which is produced by cells. Serotonin is found in blood platelets, throughout the central nervous system, and digestive system.
Serotonin results in all parts of the body from emotions to motor skills. It can be a mood stabilizer. The chemical that helps with eating, sleeping, and digesting.
Serotonin also helps to regulate anxiety, heal wounds and reduce depression.

The rate that would change would be the  searching efficiency/attack rate. there are only two other rates in this model: the  growth rate of prey, and the  predator or consumer mortality rate.the  searching efficiency/attack rate is what indicates how effectively can a predator capture its prey whether in the searching process or actual capturing/attacking process.