. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. '4000 8000 12000 "short duration" total oxygen uptake rate, uW Figure 4. Arenicola #21. Mechanical power. WMEC, necessary' to obtain the flow of water through either the low resistance Rl or the higher resistance R2. as a function of the total energy expenditure esti- mated as the "short duration" total O; uptake. shMj?1. The drawn curves were fitted by eye. Symbols as in Figure 2. Equation corresponding to Rl: r = .v' -"/( 10") (r = ) and to R2: y = xl-""/( 106) (r =
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. '4000 8000 12000 "short duration" total oxygen uptake rate, uW Figure 4. Arenicola #21. Mechanical power. WMEC, necessary' to obtain the flow of water through either the low resistance Rl or the higher resistance R2. as a function of the total energy expenditure esti- mated as the "short duration" total O; uptake. shMj?1. The drawn curves were fitted by eye. Symbols as in Figure 2. Equation corresponding to Rl: r = .v' -"/( 10") (r = ) and to R2: y = xl-""/( 106) (r = ) (see text). suring the duration of each respiratory period, TR. and calculating the stroke volume of the pump. Vs. according to the equation Vs = Vw X TR. Figure 6 shows that the breathing pattern was similar whether the animal was breathing against a low or high resistance. However, the ventilatory flow rate under high resistance was significantly lower than under low resistance, with a small, nonsignif- ouu~ 400- Exp # 21 Y re 0. 300 / ^ X 0. 200 , / n" T ^^ / ,•-* D FM 100- / i**3 + DO / ' Fit o- 0. /^^ • R1 30 ventilatory flow rate, ml/s Figure 5. Arenicola #21. APHYD, difference of pressure between the anterior chamber and atmosphere, as a function of Vw, the ventilatory flow rate through low and high resistances, R1 and R2. Values of APHVD and Vw from Figures 2 and 3. The slopes of the regression lines correspond to the mean values of R1 and R2, about 2600 and 5900 Pa • s/ml. Symbols as in Fig. 2. Equation corresponding to R1: r = 2635 .v + IO(/- = ). and to R2: y = 5917 .v + 5 (r = ). E en Exp # 21 ml/s ml/s / ml/s. ml/s 10 15 TR,S 20 25 Figure 6. Arenicola #21. Water stroke volume. Vs. versus the duration of successive ventilatory cycles. TR, with the animal breathing through a low resistance, R1, or a high resistance, R2. The oblique lines correspond to various iso-ventilatory flow rates, in mi
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
