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We review studies claiming that fish feel pain and find deficiencies in the methods used for pain identification, particularly for distinguishing unconscious detection of injurious stimuli (nociception) from conscious pain. Results were also frequently misinterpreted and not replicable, so claims th...
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Tuna are unusual among fish in that they are warm bodied. It is agreed that one adaptive advantage to being warm is that the warmth increases the rate of delivery of oxygen from the cell boundary to the mitochondria by myoglobin. Tuna have extremely high rates of oxygen uptake, much higher than othe...
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Rainbow trout, Oncorhynchus mykiss, were injected with an adrenergic agonist. an adrenergic antagonist, or a cholinergic antagonist, via a dorsal aorta cannula. Spleen size and haemoglobin content were measured at rest and, for antagonists, following an air exposure stress. Injection of phentolamine...
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Growth hormone transgenic coho salmon Oncorhynchus kisutch fed at the same ration level as non-transgenic controls (Tc) had the same growth rate as non-transgenic controls (Nt). In contrast, growth hormone transgenic coho salmon (Tf) fed ad libitum ate about twice as much and had much higher growth ...
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We examined the effects of midline and off midline incision locations, acid incisions closed with monofilament or silk suture on spontaneous swimming behaviour in fish. Each fish had a dummy transmitter surgically implanted into its peritoneal cavity. The behaviour of fish in each treatment was esti...
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Specific activity and kinetic constants of trypsin from the pyloric caeca of rainbow trout (Salmo gairdneri) were estimated. Although one group was fed mo