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- W2081751504 abstract "The muscular contractions of the valves and the flow rate of inhalent currents in the brachiopod Terebratulina septentrionalis (Couthouy) have been directly and continuously monitored using a bead thermistor as the flow meter. Flow rate varied between individuals, with velocities reaching a maximum rate of 7 mm/sec. The flow rate of an individual was not constant: between adductions of the valves it increased gradually from zero to a peak velocity. A high average flow rate of up to 2 h duration alternated with low average velocities of longer duration. The variation in flow rate may be reflecting regulation of oxygen consumption. Intervals between adductions of the valves appeared to exhibit a fluctuating pattern of regularity. The sequence of adductions could not be correlated with elimination of feces, with tides, or with light factors. There was a ‘negative’ deflection of the flow curve resulting from heating of the thermistor bead in the initial flow in brachiopods which had been closed for 4 h or more: this type of deflection was also interspersed with normal inhalent flow in many specimens. Such negative deflections could be due to the erratic behavior of the thermistors or to metabolic activity. Potassium nitrate and potassium chloride were found to stimulate muscles and cilia, causing numerous muscle contractions and increased flow. Increased flow alone was induced by the addition of calcium nitrate." @default.
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- W2081751504 date "1971-01-01" @default.
- W2081751504 modified "2023-09-27" @default.
- W2081751504 title "Behavior in the brachiopod Terebratulina septentrionalis (Couthouy)" @default.
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- W2081751504 doi "https://doi.org/10.1016/0022-0981(71)90046-3" @default.
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