An electrophysiological characterization of ciliated olfactory receptor cells of the coho salmon Oncorhynchus kisutch.

Re-evaluating NADPH-diaphorase histochemistry as an indicator of nitric oxide synthase: an examination of the olfactory system of coho salmon (Oncorhynchus kisutch).

The NADPH-diaphorase (NADPH-d) histochemical technique is commonly used to localize the nitric oxide (NO)-producing enzyme NO synthase (NOS) in neural tissues. In the olfactory tissues of vertebrates, however, NADPH-d staining can be present without the detection of NOS by other methods. We used pharmacological controls to determine whether NADPH-d staining was indicative of NOS in olfactory ti...

Chemosensory deprivation in juvenile coho salmon exposed to dissolved copper under varying water chemistry conditions.

Dissolved copper is an important nonpoint source pollutant in aquatic ecosystems worldwide. Copper is neurotoxic to fish and is specifically known to interfere with the normal function of the peripheral olfactory nervous system. However,the influence of water chemistry on the bioavailability and toxicity of copper to olfactory sensory neurons is not well understood. Here we used electrophysiolo...

Sublethal effects of copper on coho salmon: impacts on nonoverlapping receptor pathways in the peripheral olfactory nervous system.

The sublethal effects of copper on the sensory physiology of juvenile coho salmon (Oncorhynchus kisutch) were evaluated. In vivo field potential recordings from the olfactory epithelium (electro-olfactograms) were used to measure the impacts of copper on the responses of olfactory receptor neurons to natural odorants (L-serine and taurocholic acid) and an odorant mixture (L-arginine, L-aspartic...

Genetic characterization of coho salmon (Oncorhynchus kisutch) in Agency Creek, a tributary to the South Yamhill River (Willamette Basin, OR)

X-cell lesions in the liver of coho salmon Oncorh vnch us kisutch

A coho salmon Oncorhynchus kjsutch (Walbaum) was found to develop lesions associated with so called X-cells propagating in the liver parenchyma. The ultrastructural features, insufficient to determine the origin of X-cells, corresponded to those found in pseudobranchial tumours of Atlantic cod by Watermann & Dethlefsen (Helgolander Meeresunters. 35: 231-242, 1982).