Responses of the respiratory pumps to hypoxia in the rainbow trout (Salmo gairdneri).

Free and Total Calcium Concentrations in the Blood of Rainbow Trout, Salmo Gairdneri, during 'stress' Conditions

Measurements were made of the free and total calcium concentrations ([Ca] and Cat), acid-base status, haemoglobin concentration, haematocrit and plasma protein concentration in the blood of the rainbow trout, Salmo gairdneri. In isolated blood, [Ca] was proportional to Cat while log[Ca] was inversely proportional to pH. Similar findings have been reported from human blood. During intense activi...

The effect of hypoxia and anaemia on the swimming performaance of rainbow trout (Salmo gairdneri).

A Study of the Effect of Temperature Changes on the Respiratory Pumps of the Rainbow Trout

The pumping mechanism maintaining water flow across the gills has been investigated in the trout using pressure transducers and cine analysis (Hughes & Shelton, 1957, 1958). It was shown that the mechanism could be considered as being made up of a buccal pressure pump and opercular suction pumps, the two being separated functionally by the gill resistance. In this species, Salmo gairdneri, the ...

Pituitary activation by bacterial endotoxins in rainbow trout (Salmo gairdneri).

Endotoxins from Escherichia coli and Aeromonas salmonicida caused marked cortisol production in the rainbow trout (Salmo gairdneri).

Oxygen Consumption and Swimming Performance in Hypoxia-acclimated Rainbow Trout Salmo Gairdneri

1. Swimming performance and oxygen consumption of normoxic (control) and hypoxia-acclimated (P02 — 40mmHg) rainbow trout, Salmo gairdneri Richardson, were monitored at >145, 60 and 40mmHg. 2. Maximum swimming velocity at 40mmHg was reduced from >54-8cms"' to 41-4cms" in controls and to 40-6cms" in hypoxiaacclimated fish. 3. Normoxic oxygen consumption of control fish ranged from Q-T-SmgOzkg-'h(...