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They also acquire practical experience in the application of these concepts and methods , via half-semester mini courses ( e.g ., new product development , advertising , retailing ) and a capstone course . Monaghan 's group examined several reproductive and behavioral parameters of the seabird species including ; egg laying date , clutch size , average breeding success , body condition , foraging trip duration , foraging trip distance , and number of dives and dive duration ( for shag and murre ) . Although the evidence continues to point to androgens and serotonin ( 5-HT ) as major hormonal and neurotransmitter factors in aggressive behavior , recent work with GABA , dopamine , vasopressin , and other factors , such as nitric oxide , has revealed significant interactions with the neural circuitry underlying aggression .