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Gerlach, Gabriele and Wullimann, Mario F. (2021): Neural pathways of olfactory kin imprinting and kin recognition in zebrafish. In: Cell and Tissue Research, Vol. 383, No. 1: pp. 273-287

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Teleost fish exhibit extraordinary cognitive skills that are comparable to those of mammals and birds. Kin recognition based on olfactory and visual imprinting requires neuronal circuits that were assumed to be necessarily dependent on the interaction of mammalian amygdala, hippocampus, and isocortex, the latter being a structure that teleost fish are lacking. We show that teleosts-beyond having a hippocampus and pallial amygdala homolog-also have subpallial amygdalar structures. In particular, we identify the medial amygdala and neural olfactory central circuits related to kin imprinting and kin recognition corresponding to an accessory olfactory system despite the absence of a separate vomeronasal organ.

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