. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. TEMPORAL FILTER MODEL 357. CARRIER FLOW VELOCITY Cm B~' •' crou ttrUcnil center STIMULUS FLOW VELOCITY 25 cm s «t nottl* 50 ml min Figure 1. Diagram of flume used for salt plume turbulence mea- surements at the size and time scale of lobster chemoreceptor organs. Probes shown at each of the four sites; only one probe was in the water during the measurements, all taken in the cross-sectional center of the plume. exist in the functional designs of fish noses. Fish have been classified (Doving et al, 1977) as isosmates (con
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. TEMPORAL FILTER MODEL 357. CARRIER FLOW VELOCITY Cm B~' •' crou ttrUcnil center STIMULUS FLOW VELOCITY 25 cm s «t nottl* 50 ml min Figure 1. Diagram of flume used for salt plume turbulence mea- surements at the size and time scale of lobster chemoreceptor organs. Probes shown at each of the four sites; only one probe was in the water during the measurements, all taken in the cross-sectional center of the plume. exist in the functional designs of fish noses. Fish have been classified (Doving et al, 1977) as isosmates (contin- uous ciliary flow, , catfish) and cyclosmates ("sniffing" via accessory pumps and muscles, , tuna). Overall, our model was designed to represent the stimu- lus pulse patterns that a chemoreceptor cell in situ with known temporal filter characteristics might detect within the odor plume emanating from a pumping mussel lo- cated a short distance upcurrent. The first generation model is meant to define critical parameters, particularly those for which little or no information is yet available. Materials and Methods Plume model To generate the model plume we used a 248 cm X 34 cm X 23 cm flume with a tap water flow ( ± .21/min) (Fig. 1). This carrier flow passed through three sheets of window screen, and a collimator of 5 mm diameter soda straws 22 cm long. The test area was 142 cm long. An- other row of 10-cm long soda straws was placed before the outflow tube. The flow velocity in the center of the test area was ± cm/s measured by timing the movement of a patch of dye. The tracer plume was a NaCl solution injected at 50 ± 1 ml/min. into the test area of flow through a Pas- teur pipette with 1 mm ID tip opening. Flow velocity at the nozzle was 25 cm/s (Re « 500). The nozzle of the pipette was 10 cm down-stream from the collimator, 7 cm from the bottom and equidistant from the sides. A dye was mixed in with the salt solution to visually
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
