Ecological impacts and behaviour interactions of the notorious invasive lionfish (Pterois volitans)

Chapter three contrasts the effects of juvenile and adult lionfish on prey species, including the commercially significant Nephrops norvegicus, emphasizing differences in prey consumption patterns and prey types. Chapter four evaluates the impact of group behaviour on juvenile lionfish's consumption of prey species, uncovering potential destabilization effects, especially on crab species. These findings also illuminate how conspecific interactions can shape feeding behaviours of other IAS.

Chapter five explores lionfish personality traits, such as boldness and shyness, and their relationship with predatory impact. While individual personalities remained consistent, no discernible link emerged between personality and impact, suggesting that other factors wield influence over overall impact. Chapter six concludes by underscoring the significance of this thesis in combining FR and behaviour metrics as a swift tool for assessing and predicting threats posed by emerging or established invaders, thereby aiding in IAS risk assessment.

It also offers management recommendations for curtailing the lionfish invasion, advocating for collaborative efforts between researchers and managers to effectively address this ecological challenge.