Cognitive ability in fish -- Communication -- The physiology of antipredator behaviour: what you do with what you've got -- Effects of parasites on fish behavior: interactions with host physiology -- Social interactions -- Circadian rhythms in fish -- Behavioural physiology of fish migrations: salmon as a model approach -- Neuroendocrine mechanisms of alternative reproductive tactics in fish -- Reproductive pheromones -- Anthropogenic impacts unpon behaviour and physiology.