Abstract
In fish, environmental hypoxia is detected by O2 chemoreceptors, mainly located in the gills and orobranchial cavity, which trigger cardiorespiratory adjustments. The neuroepithelial cells (NECs), found in fish gill arches, are morphologically similar to the mammals O2 chemoreceptors and have been reported as putative O2 sensitive cells. The aim of the present study is to verify the distr…