Intestinal Blood Flow in Swimming Chinook Salmon Oncorhynchus Tshawytscha and the Effects of Haematocrit on Blood Flow Distribution
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Cardiovascular changes and catecholamine release following anaesthesia in Chinook salmon (Oncorhynchus tshawytscha) and snapper (Pagrus auratus).
We investigated recovery from anaesthesia in Chinook salmon (Oncorhynchus tshawytscha) with and without surgery. Fish either underwent light sedation on exposure to 60 ppm AQUI-S or surgical depth anaesthesia with 120 ppm AQUI-S. Surgical depth anaesthesia experiments were replicated using New Zealand snapper (Pagrus auratus). During light sedation, there was no evidence of catecholamine releas...
متن کاملThe Effect of Graded Methaemoglobin Levels on the Swimming Performance of Chinook Salmon (oncorhynchus Tshawytscha)
Nitrite oxidizes haemoglobin (Hb) to methaemoglobin (MetHb), which is unable to bind oxygen. Nitrite exposure can therefore be used as a tool to manipulate the oxygencarrying capacity of the blood without changing haematocrit. The objective of this study is to examine the relationship between the critical swimming velocity (Ucrit) and the functional haemoglobin concentration ([Hb]) of the blood...
متن کاملDiazinon disrupts antipredator and homing behaviors in chinook salmon (Oncorhynchus tshawytscha)
Neurotoxic pesticides are known to contaminate surface waters that provide habitat for salmonids, including some listed for protection under the U.S. Endangered Species Act. Despite their widespread use, the impacts of these pesticides on the neurological health of wild salmon are not well understood. Of particular concern are the organophosphate and carbamate insecticides that block synaptic t...
متن کاملAdaptive genetic markers discriminate migratory runs of Chinook salmon (Oncorhynchus tshawytscha) amid continued gene flow
Neutral genetic markers are routinely used to define distinct units within species that warrant discrete management. Human-induced changes to gene flow however may reduce the power of such an approach. We tested the efficiency of adaptive versus neutral genetic markers in differentiating temporally divergent migratory runs of Chinook salmon (Oncorhynchus tshawytscha) amid high gene flow owing t...
متن کاملOxygen and carbon dioxide transport during sustained exercise in diploid and triploid chinook salmon (Oncorhynchus tshawytscha)
To better understand the respiratory physiology of triploid fish, we conducted an analysis of O2 and CO2 transport in diploid and triploid chinook salmon (Oncorhynchus tshawytscha) swimming at 0.4 body lengths (BL)·s–1, at 2.0 BL·s–1, and at the critical swimming velocity (Ucrit). While O2 consumption rates (MO2), MO2 max, and Ucrit did not differ between ploidies, triploids had a smaller incre...
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تاریخ انتشار 1998