Related Experiment Video
Updated: Jul 13, 2026

The Resident-intruder Paradigm: A Standardized Test for Aggression, Violence and Social Stress
Published on: July 4, 2013
Relationship between the serum concentrations of serotonin and lipids and aggression in dogs
D Cakiroğlu1, Y Meral, A A Sancak
1Department of Internal Diseases, Faculty of Veterinary Medicine, University of Ondokuz Mayis, 55139 Kurupelit, Samsun, Turkey.
Abstract:
The serum concentrations of serotonin and lipids--triglycerides, total cholesterol, low density lipoprotein, high density lipoprotein and very low density lipoprotein--were determined in 18 normal dogs and 23 dogs diagnosed as aggressive on the basis of interviews with their owners and an assessment of their behaviour with reference to a canine overt aggression chart. The serum serotonin levels in the aggressive dogs were significantly lower than in the normal dogs (P<0.01), but the differences in serum lipids between the two groups were not statistically significant.
Related Concept Videos
Aggression
Causes of Social Behavior III: Biological and Environmental Influences
Secondary Motives: Affiliation Motivation and Aggression Motivation

