Author(s):

Siswanto, IN Sadra Dharmawan, IK Puja, IGA Arta Putra and IGNG Bidura

Abstract: Previous researchers stated that dog behavior is influenced by many factors such as place/origin, the environment, food, and training. No exception the dog's aggressiveness can be influenced by management system of the owner. This study took a sample of dogs from different places, namely from the hilly places in the Kintamani highlands and from urban Denpasar. As a result of different places and management will have an impact on different behaviors/aggressiveness. The purpose of this study was to determine levels of serotonin(SrO) and monoamine oxidase (MAO) enzyme in Balinese Kintamani dogs (Canis lupus familiaris) from different originson dog aggressiveness.For this purpose, we used forty dogs, 15 male dogs and 25 female dogs were used in this study. The cross-sectional design of observational research is used in observation and sampling techniques. The results showed that the average level of serotonin in dogs from Kintamani hill were 240.2±46.5 ng/mL (male); 265.4±38.2ng/mL (female) and from Denpasar were 273.0±34.3 ng/mL (male); 297.5±45.9 ng/mL (female), respectively. The average level of MAO in dogs from Kintamani hill were male3.4±0.38 ng/mL (male), female 5.07±0.39 ng/mL (female), and from Denpasar: male 4.63±1.90 ng/mL (male) and 4.75±1.28 ng/mL (female), respectively. It was concluded that the environmental conditionsof the place, food, owner's style in maintaining, greatly affect the behavior of dogs, in turn affect the profile of serotonin and monoamine oxidase enzymes.

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