. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. RESPIRATORY ADAPTATIONS IX A MYSID 111 tion and placing an oxygen electrode near the animal's pleopods. The activity and respiratory rates of animals were monitored simultaneously in several runs by fastening the animal in the above manner in a respiration chamber containing a second, isolated electrode agitated by a stirring bar. The animal's activity was indicated by the difference in readings between the animal-stirred electrode and the electrode stirred at a constant rate by the magnetic stirrer. Respiratory rate, oxygen
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. RESPIRATORY ADAPTATIONS IX A MYSID 111 tion and placing an oxygen electrode near the animal's pleopods. The activity and respiratory rates of animals were monitored simultaneously in several runs by fastening the animal in the above manner in a respiration chamber containing a second, isolated electrode agitated by a stirring bar. The animal's activity was indicated by the difference in readings between the animal-stirred electrode and the electrode stirred at a constant rate by the magnetic stirrer. Respiratory rate, oxygen in exhaled water, and flow rate of water over the gills were measured simultaneously in the following manner. The animal's head was placed in a cylindrical plastic vial and a piece of rubber balloon sealed the animal to the vial. Water was drawn in under the carapace, passed through the gills and then pumped out of the carapace into the vial where it first passed a Beckman Macro Oxygen Electrode and then a thermistor flowmeter. The term ventilation volume will be used to refer to the rate of volumetric flow of seawater over the gills. The flowmeter was a thermistor probe (Yellow Springs Instrument Co. model 403) with 30 inches of 30-gauge nichrome wire wrapped around the tip and insulated with epoxy enamel. This wire was heated with 400 ma at 3 volts and the resulting thermistor temperature was proportional to the flow rate past it. The flowmeter was calibrated by measuring the amount of water that had run past it in a given period of time. The precision of the flowmeter was about ±10% between + 3 -. -2 -I 0 +1 + 2 In WET WEIGHT (grams) FIGURE 1. Relation between (In) size and (In) respiration (lowest sustained rates, see text) in Gnathophausia ingens at ° C; - - regression line In R = — + In W, R = W°-9K ± °10, 95% confidence interval for mean R at given W, - 95% confidence interval for individual R at given W, envelope around all measured respi
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
