Experimental evidence for inherent Lévy search behaviour in foraging animals

摘要: Recently, Levy walks have been put forward as a new paradigm for animal search and many cases made its presence in nature. However, it remains debated whether are an inherent behavioural strategy or emerge from the reacting to habitat. Here, we demonstrate signatures of behaviour movement mud snails (Hydrobia ulvae) based on novel, direct assessment properties experimental set-up using different food distributions. Our data uncovered clusters small steps alternating with long moves independent encounter landscape complexity. Moreover, size distributions these followed truncated power laws. These two findings characteristic mechanisms underlying Levy-like movement. Thus, our study provides clear evidence that such multi-scale is rather than resulting interacting environment.