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The mode of colonization of the lateral line melanophore band of the zebrafish, Brachydanio rerio, by the second wave of melanophores has been investigated. This stripe forms in two consecutive stages. First, there is an initial migration and reorientation of pigment cells in an anteroposterior wave into the site to form an interrupted stripe. Following(More)
Object permanence in Eurasian jays (Garrulus glandarius) was investigated using a complete version of the Uzgiris and Hunt scale 1. Nine hand-raised jays were studied, divided into two groups according to their different developmental stages (experiment 1, older jays: 2-3 months old, n = 4; experiment 2, younger jays: 15 days old, n = 5). In the first(More)
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