(2008). The effects of the acetic acid " pain " test on feeding, swimming, and respiratory responses of rainbow trout (Oncorhynchus mykiss).

The olfactory system of fish is extremely important as it is able to recognize and distinguish a vast of odorous molecules involved in wide ranges of behaviors including reproduction, homing, kin recognition, feeding and predator avoidance; all of which are paramount for their survival. We cloned and characterized one type olfactory receptors (ORs) from five congeneric salmonids: lacustrine soc...

This study addressed the hypothesis that the secretion of catecholamines from trout (Oncorhynchus mykiss) chromaffin cells, during hypoxia, is triggered by stimulation of O(2) chemoreceptors located within the gills. Sodium cyanide was administered into the inspired water (external cyanide) or injected into the gill circulation (internal cyanide) to pharmacologically stimulate external (water s...

For most teleost fish, the majority of the myocardial oxygen supply is provided by the oxygen reserve remaining in venous blood after other tissues have extracted oxygen. We examined the effect of graded exercise and water temperature on this venous blood oxygen supply to the heart (termed the cardiac circulation) by performing novel on-line measurements of venous partial pressure of oxygen (Pv...

Ahstmct: Movements of juvenile coho salmon (Oncorhynrhu,~ kisutch), cutthroat trout (Oncorhynchus clarki clarki), wd steelhead trout (Oncorhynchus mykiss) were studied by observalions and rccapturc of marked individutlls in three western Washington streams to test the hypotheses that few fish would move, downstream movement would predominate, movers would be initially smaller and grow slower af...

The sensitivity of Vibrio anguillarum to the bactericidal effect of rainbow trout serum was investigated with different strains of serogroups O1 and O2a, which are the most frequently found serogroups in clinical outbreaks of vibriosis. All of the V. anguillarum strains were able to activate complement in rainbow trout serum, but smooth strains of V. anguillarum serogroup O1 were resistant to c...

Colonization of host tissues is a first step taken by many pathogens during the initial stages of infection. Despite the impact of bacterial disease on wild and farmed fish, only a few direct studies have characterized bacterial factors required for colonization of fish tissues. In this study, using live-cell and confocal microscopy, rainbow trout skin epithelial cells, the main structural comp...

In this study, the effects of arginine on growth, serum antioxidant levels, intestinal digestion physiology, protein synthesis, and expression inflammatory-related genes triploid juvenile rainbow trout (Oncorhynchus mykiss) were investigated. Five diets containing 0.86%, 1.65%, 2.10%, 2.85%, 3.50% fed to satiation triplicate groups 30 fish per tank for 8 weeks. The results showed that weight ga...

Beneficial effects of a sodium butyrate source on growth performance, intestinal bacterial communities, digestive enzymes, immune responses and disease resistance in rainbow trout (Oncorhynchus mykiss)