. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FEEDING BIOLOGY OF D1SCOSOMA 225 70 60 50 40 30 20 10 0. Control GSH 10-3 Proline 10-3 Proline 10-2 Figure 11. Boxplots for the number ofminutes the oral disc of Dis- cosoma sanclithomae remained closed after being stimulated with a light touch of a glass pipette and then ml of solution being injected into the cavity formed by the margin of the oral disc. The control was plain seawater and the treatments were solutions of glutathione and proline. Ten trials were performed for the control and each treatment in laboratory
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FEEDING BIOLOGY OF D1SCOSOMA 225 70 60 50 40 30 20 10 0. Control GSH 10-3 Proline 10-3 Proline 10-2 Figure 11. Boxplots for the number ofminutes the oral disc of Dis- cosoma sanclithomae remained closed after being stimulated with a light touch of a glass pipette and then ml of solution being injected into the cavity formed by the margin of the oral disc. The control was plain seawater and the treatments were solutions of glutathione and proline. Ten trials were performed for the control and each treatment in laboratory tests. Each treatment was significantly different from the control (P < ; Mann-Whitney tests), and proline (10~: M) was significantly different from the other two treatments (P ; Mann-Whitney test). mesenterial filaments and did not reopen for several hours. The time specimens remained closed was greater for animals stimulated with proline (10~2 M) than for proline (10'3 M) and GSH (1CT3 A/) (P Mann-Whitney test). Tests were done with filter papers (with and without chemicals) to determine which chemicals elicited the en- velopment response and subsequent ingestion (Table III). Most animals did not respond to plain pieces of filter paper that were dropped onto the oral disc (>93% of tri- als), and the papers were rarely ingested (<2% of trials). All trials were done by first dropping a plain piece of filter paper onto the oral disc and if there was no response then a treated piece of paper was tested. Chemicals effective only at high concentrations in the field syringe tests did not elicit consistent closure or ingestion in these tests. Proline and GSH-treated filter papers caused immediate closure of the oral disc, but GSH was effective at lower concentrations. Only GSH elicited consistent ingestion. Some filter papers with GSH that were not ingested were covered with mesenterial filaments extruded through the mouth or body wall of the oral disc. Simila
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
