. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 662 Behavior CLAY SASSAMAN AND CHARLOTTE P. MANGUM The column of intact Halochii-n prudncta shows a rhythmic pattern of contrac- tion and relaxation similar to those already described for Mctridiiini senile (Batham and Pantin, 1950a) and Diadinnoie Icncolcna (Sassaman and Mangum, 1970). The frequency of the pattern is 12 (± ) contractions/hr ( hrs recording time). PI. producta also irrigates artificial burrows with cyclic peristaltic waves which originate below the tentacular ring and are propagated aborally. Obs
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 662 Behavior CLAY SASSAMAN AND CHARLOTTE P. MANGUM The column of intact Halochii-n prudncta shows a rhythmic pattern of contrac- tion and relaxation similar to those already described for Mctridiiini senile (Batham and Pantin, 1950a) and Diadinnoie Icncolcna (Sassaman and Mangum, 1970). The frequency of the pattern is 12 (± ) contractions/hr ( hrs recording time). PI. producta also irrigates artificial burrows with cyclic peristaltic waves which originate below the tentacular ring and are propagated aborally. Observations of four different individuals revealed periodicities of 25, 25, 25 and 24 sec between pumps, with the waves traveling at approximately cm/sec. Geometrical analysis of an anemone irrigating a glass tube yielded an approximate pumping volume of 148 /^I/pump which (with the above periodicity » gives a rate of 21 FIGURE 1. Kymographic recording of [lalochi-ia products irrigating an artificial burrow. Scale indicates one hour. Kymographic recordings of irrigation behavior (Fig. 1) show that irrigation can continue for substantial periods uninterrupted. Indeed, our longest recordings of continued irrigation activity exceed 24 hrs. Quantification of irrigation rate from calibrated kymograph records gives a pump volme of 127 ± /J (based on 42 pumps) and a frequency of ± pumps/hr (based on 5 hr recording time) for an irrigation rate of ml/hr. Since a typical g animal consumes 15/1,1 Oo/hr, it must utilize approximately 33% of the /d CX made available by irrigation of the burrow with air saturated water from above. Peristaltic waves are not uncommon in anthozoans, having been reported in a pennautlid, Pteroides griseum (Brafield and Chapman, 1967), and waves from pedal disc to oral disc are known to aid in body wall cleansing and defecation in Metridium senile (Batham and Pantin, 1950b). We are not, however, familiar with any previous
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