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| Titel: |
Food recognition by chaetopterus variopedatus (renier): Synergy of mechanical and chemical stimulation |
| Auteur: |
Sumida, Brian H. Case, James F. |
| Verschenen in: |
Marine & freshwater behaviour & physiology |
| Paginering: | Jaargang 9 (1983) nr. 4 pagina's 249-274 |
| Jaar: |
1983-07 |
| Inhoud: |
Food recognition and related behaviour was studied in specimens of Chaetopterus variopedatus (Renier) housed in glass tubes in flowing seawater. Particulates and amino acids were added to the flow, mimicking food stimuli and water currents produced by the worm's fanning and were recorded with a Doppler flow meter. Fanning duration was negatively correlated with feeding. Of amino acids tested, glycine and taurine significantly reduced fanning duration. Cellulose chromatography beads, a non-chemically enriched particulate food mimic, also significantly reduced fanning duration. However, neither particulate nor chemical stimuli were equal to plankton (Gonyaulax polyedra) in reducing fanning duration. When an ineffectively low concentration of glycine was presented simultaneously with chromatography beads, at one-hundredth the particle concentration of plankton, fanning duration shortened to periods characteristic of responses to plankton. These results suggest that both particulate (tactile) and chemical stimuli are important in the recognition of food. Synergy between the two senses appears necessary to effect a maximum feeding response. Long-term (24 hour) exposure to low-concentration water-soluble petroleum fractions (WSF) caused desensitization of chemoreception in adult C. variopedatus. Short-term exposure to WSF had no effect on fanning duration. Dilute acetic acid solution evoked simultaneous bioluminescence and rejection responses. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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