Previous studies have shown androgens play an important role in the development of primary sexual characteristics, spermatogenesis, and some secondary sexual characteristics (Oliveira et al, 2001, 2002). However, the relationship between androgens and behavior is less well defined. Some previous experiments show a positive correlation in a variety of species between androgen levels and behavior such as courtship and aggression (Day et al., 2005; Arnold et al., 1975; Salek et al., 2001)
Amatitlania nigrofasciata, commonly known as the convict cichlid, is a monogamous bi-parental species. In this species, male androgen levels are highest while courting and may contribute to displays of aggression towards other males while competing for potential mates. This study will explore if manipulating levels of 11-KT, the primary androgen in fish, affects male-male competition during the courtship phase.