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Response of olfactory receptors and blood cells of Lake Baikal fish to phenol exposure

Yakhnenko V., Klimenkov I., Pastukhova N.

Environmental Biotechnology

2010

Vol. 6, No. 2

66-73

Exposure to phenol causes ultrastructural disorders in supporting and receptor cells in the peripheral segment of the olfactory organ of yellowfin (Cottocomephorus grewingkii) and in cells in peripheral blood of stone sculpins (Paracottus knerii), yellowfin and perch (Perca fluviatilis). Identical responses to phenol exposure in the blood cells were observed in endemic Lake Baikal fish and in nonendemic fish. Differences were found only in the rate and intensity of the recovery response. Fast activation of immune processes were found in the coastal nonendemic perch, but they were slow in the stone sculpin, a coastal endemic species.

The spatial organization of the peripheral olfactory organ in the round goby (Neogobius melanostomus)

Belanger R. M., Corkum L. D., Zielinski B.

Oceanological Studies

2002

Vol. 31, No. 1-2

23-29

Round goby (Neogobius melanostomus) spawning behaviour and parental care by males may be mediated by pheromones. We examined the spatial organization of the peripheral olfactory organ in round goby. Olfactory receptor neurons were visualized in cryostat sections stained for acetylated tubulin immunocytochemistry and by transmission electron microscopy. The olfactory epithelium is located adjacent to the tentacular anterior nostril and extends ventrocaudally along the relatively flat surface of the nasal cavity. Numerous nonmyelinated nerve fascicles formed in the lamina propria and converged into a prominent olfactory nerve. A sac-like enclosure was found on the posterior ventral surface that may regulate flow through the nares.