期刊
ACTA ZOOLOGICA
卷 100, 期 2, 页码 160-166出版社
WILEY
DOI: 10.1111/azo.12242
关键词
accessory respiratory organ; Clarias gariepinus; neuroepithelial cells; neurotransmitter substances; nitric oxide
Available studies that have examined O-2 sensing in fish have indicated that oxygen-sensitive neuroepithelial cells (NECs) are O-2 sensors in the gills and initiate cardiorespiratory reflexes in aquatic vertebrates. This is the first study describing the occurrence of NECs in accessory respiratory organs in the air-breathing catfish Clarias gariepinus. Immunocytochemical stainings with specific neuronal markers such as nNOS, VAchT, 5-HT and TH have been shown to be very useful for location and distribution of these cells in the gill fans and suprabranchial chamber that take origin from the transformation of the gill tissue. But the response of these putative O-2 chemoreceptors, their role in the respiratory reflexes and their innervation await investigation.
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