ABSTRACT
Teleost fishes are the largest and most diverse vertebrate group, with over 25,000 described species. Fish display an almost unique variety of reproductive strategies and behaviours, and for this reason have attracted the attention of researchers encompassing most disciplines of reproductive biology, including reproductive endocrinology and behaviour. The regulation of reproductive behaviour in fishes is complex, and involves the interaction of a number of physiological as well as environmental and social factors. Although considerable advances have been made in understanding the hormonal control of reproductive behaviour in fish,
these earlier works are now outdated and significant gaps in our knowledge still exist. One of the species that has contributed greatly to our better understanding of hormone-behavioural relationships in fish is the three-spined stickleback,
Gasterosteus aculeatus.
