. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Control •. T B 0) w c 0) OC « 15 C 101 10° 101 102 103 101 10° 101 102 103 [] (mM) 10-' 10° 101 102 103 Figure 3. (A) Examples of multiunit nerve responses to solutions of Na2S in the second antenna, and in the medial and lateral filaments of the first antenna excised from Rimicarix sp. The bold vertical arrow s after the beginning of each 2 s record indicates when the stimulus, whether one of the Na>S or control solutions, was applied. Transient responses following the
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Control •. T B 0) w c 0) OC « 15 C 101 10° 101 102 103 101 10° 101 102 103 [] (mM) 10-' 10° 101 102 103 Figure 3. (A) Examples of multiunit nerve responses to solutions of Na2S in the second antenna, and in the medial and lateral filaments of the first antenna excised from Rimicarix sp. The bold vertical arrow s after the beginning of each 2 s record indicates when the stimulus, whether one of the Na>S or control solutions, was applied. Transient responses following the exposure may have been due to tactile receptors activated by fluid motion. The activity following the transient response increased significantly with [Na2S] in the second antenna. Exposure of filaments of either antenna to control solutions, either artificial seawater (ASW) or pH 13, evoked little or no response. These electrophysiological recordings from antennal filaments of hydrothermal vent shrimp collected from the Snake Pit site on the Mid-Atlantic Ridge (depth cti. 3600 m) were made aboard R/V Atlantis II Filaments were excised from active shrimp and maintained in Linuihis physiological solution (6). Several segments of the exoskeleton were removed to expose a short length of antennal nerve, which was either wholly or partially drawn into a suction electrode filled with the same solution. Filaments with spontaneous nerve activity and sensitivity to tactile stimuli were judged to be in good physiological condition and were chosen for further experimentation. A single drop of the test solution was gently merged with the fluid surface next to the antenna away from the tip of the suction electrode. Because of the differential behavior of the axonal responses from the various filaments, it is unlikely that the responses of the second antenna are due to some general injury response of the exposed ends of the axons to sulfide. Test solutions were as follows: Na2S was dis
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
