Visual Cues Have a More Extensive Effect on Topmouth Gudgeon (Pseudorasbora parva) than Chemosensory Cues in Identifying Novel Predators

摘要: Through population expansion and accidental or deliberate introduction, prey commonly encounter novel predators they had never seen before. Several studies have shown that animals can generalize their learned recognition of a familiar predator to ones according predators' identical similar features. This process in fish mainly depends on the visual chemosensory cues receive. However, there is lack understanding different effects these two cues. Topmouth gudgeons (Pseudorasbora parva) turtles were captured used as subjects, three freshwater genera predators. Before after using one turtle for training treatment topmouth gudgeons, responses each tested recorded, it was found promoted gudgeons' risks represented by all training. These results further verify generalization indicate more extensive effect than identifying predators, especially are distantly related threats.